Cyclophilin A: A 17-KDa cytoplasmic PEPTIDYLPROLYL ISOMERASE involved in immunoregulation. It is a member of the cyclophilin family of proteins that binds to CYCLOSPORINE.Cyclophilins: A family of peptidyl-prolyl cis-trans isomerases that bind to CYCLOSPORINS and regulate the IMMUNE SYSTEM. EC 5.2.1.-Peptidylprolyl Isomerase: An enzyme that catalyzes the isomerization of proline residues within proteins. EC 5.2.1.8.Amino Acid Isomerases: Enzymes that catalyze either the racemization or epimerization of chiral centers within amino acids or derivatives. EC 5.1.1.Cyclosporine: A cyclic undecapeptide from an extract of soil fungi. It is a powerful immunosupressant with a specific action on T-lymphocytes. It is used for the prophylaxis of graft rejection in organ and tissue transplantation. (From Martindale, The Extra Pharmacopoeia, 30th ed).Immunophilins: Members of a family of highly conserved proteins which are all cis-trans peptidyl-prolyl isomerases (PEPTIDYLPROLYL ISOMERASE). They bind the immunosuppressant drugs CYCLOSPORINE; TACROLIMUS and SIROLIMUS. They possess rotamase activity, which is inhibited by the immunosuppressant drugs that bind to them.Cyclosporins: A group of closely related cyclic undecapeptides from the fungi Trichoderma polysporum and Cylindocarpon lucidum. They have some antineoplastic and antifungal action and significant immunosuppressive effects. Cyclosporins have been proposed as adjuvants in tissue and organ transplantation to suppress graft rejection.Carrier Proteins: Transport proteins that carry specific substances in the blood or across cell membranes.Antigens, CD147: A widely distributed cell surface transmembrane glycoprotein that stimulates the synthesis of MATRIX METALLOPROTEINASES. It is found at high levels on the surface of malignant NEOPLASMS and may play a role as a mediator of malignant cell behavior.Mitochondrial Membrane Transport Proteins: Proteins involved in the transport of specific substances across the membranes of the MITOCHONDRIA.Transmembrane Activator and CAML Interactor Protein: A tumor necrosis factor receptor superfamily member found expressed on peripheral B-LYMPHOCYTES. It has specificity for B-CELL MATURATION ANTIGEN and TUMOR NECROSIS FACTOR LIGAND SUPERFAMILY MEMBER 13.Tacrolimus Binding Proteins: A family of immunophilin proteins that bind to the immunosuppressive drugs TACROLIMUS (also known as FK506) and SIROLIMUS. EC 5.2.1.-Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Aotidae: A family of the New World monkeys inhabiting the forests of South and Central America. There is a single genus and several species occurring in this family, including AOTUS TRIVIRGATUS (Northern night monkeys).Amino Acid Sequence: The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.Calcineurin: A CALCIUM and CALMODULIN-dependent serine/threonine protein phosphatase that is composed of the calcineurin A catalytic subunit and the calcineurin B regulatory subunit. Calcineurin has been shown to dephosphorylate a number of phosphoproteins including HISTONES; MYOSIN LIGHT CHAIN; and the regulatory subunits of CAMP-DEPENDENT PROTEIN KINASES. It is involved in the regulation of signal transduction and is the target of an important class of immunophilin-immunosuppressive drug complexes.Tumor Necrosis Factor Ligand Superfamily Member 13: A member of tumor necrosis factor superfamily found on MACROPHAGES; DENDRITIC CELLS and T-LYMPHOCYTES. It occurs as transmembrane protein that can be cleaved to release a secreted form that specifically binds to TRANSMEMBRANE ACTIVATOR AND CAML INTERACTOR PROTEIN; and B CELL MATURATION ANTIGEN.Protein Binding: The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.HIV-1: The type species of LENTIVIRUS and the etiologic agent of AIDS. It is characterized by its cytopathic effect and affinity for the T4-lymphocyte.Proline: A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons.Asthenia: Clinical sign or symptom manifested as debility, or lack or loss of strength and energy.Spiro Compounds: A group of compounds consisting in part of two rings sharing one atom (usually a carbon) in common.Subtilisin: A serine endopeptidase isolated from Bacillus subtilis. It hydrolyzes proteins with broad specificity for peptide bonds, and a preference for a large uncharged residue in P1. It also hydrolyzes peptide amides. (From Enzyme Nomenclature, 1992) EC 3.4.21.62.Virus Replication: The process of intracellular viral multiplication, consisting of the synthesis of PROTEINS; NUCLEIC ACIDS; and sometimes LIPIDS, and their assembly into a new infectious particle.Sequence Homology, Amino Acid: The degree of similarity between sequences of amino acids. This information is useful for the analyzing genetic relatedness of proteins and species.B-Cell Maturation Antigen: A member of the tumor necrosis factor receptor superfamily found on mature B-LYMPHOCYTES. It has specificity for B CELL ACTIVATING FACTOR and TUMOR NECROSIS FACTOR LIGAND SUPERFAMILY MEMBER 13. Signaling of the receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.Hippocastanaceae: A plant family of the order Sapindales, subclass Rosidae, class Magnoliopsida.Adenine Nucleotide Translocator 1: A subtype of mitochondrial ADP, ATP translocase found primarily in heart muscle (MYOCARDIUM) and skeletal muscle (MUSCLE, SKELETAL).Tacrolimus: A macrolide isolated from the culture broth of a strain of Streptomyces tsukubaensis that has strong immunosuppressive activity in vivo and prevents the activation of T-lymphocytes in response to antigenic or mitogenic stimulation in vitro.Mitochondria: Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)OxazepinesVirion: The infective system of a virus, composed of the viral genome, a protein core, and a protein coat called a capsid, which may be naked or enclosed in a lipoprotein envelope called the peplos.Gene Products, gag: Proteins coded by the retroviral gag gene. The products are usually synthesized as protein precursors or POLYPROTEINS, which are then cleaved by viral proteases to yield the final products. Many of the final products are associated with the nucleoprotein core of the virion. gag is short for group-specific antigen.Cell Line: Established cell cultures that have the potential to propagate indefinitely.HSP90 Heat-Shock Proteins: A class of MOLECULAR CHAPERONES whose members act in the mechanism of SIGNAL TRANSDUCTION by STEROID RECEPTORS.Isomerism: The phenomenon whereby certain chemical compounds have structures that are different although the compounds possess the same elemental composition. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Calmodulin-Binding Proteins: Proteins which bind calmodulin. They are found in many tissues and have a variety of functions including F-actin cross-linking properties, inhibition of cyclic nucleotide phosphodiesterase and calcium and magnesium ATPases.Models, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Immunosuppressive Agents: Agents that suppress immune function by one of several mechanisms of action. Classical cytotoxic immunosuppressants act by inhibiting DNA synthesis. Others may act through activation of T-CELLS or by inhibiting the activation of HELPER CELLS. While immunosuppression has been brought about in the past primarily to prevent rejection of transplanted organs, new applications involving mediation of the effects of INTERLEUKINS and other CYTOKINES are emerging.Chloroplast Thioredoxins: A subtype of thioredoxins found primarily in CHLOROPLASTS.B-Cell Activating Factor: A tumor necrosis factor superfamily member that plays a role in the regulation of B-LYMPHOCYTE survival. It occurs as a membrane-bound protein that is cleaved to release an biologically active soluble form with specificity to TRANSMEMBRANE ACTIVATOR AND CAML INTERACTOR PROTEIN; B-CELL ACTIVATION FACTOR RECEPTOR; and B-CELL MATURATION ANTIGEN.Membrane Potential, Mitochondrial: The voltage difference, normally maintained at approximately -180mV, across the INNER MITOCHONDRIAL MEMBRANE, by a net movement of positive charge across the membrane. It is a major component of the PROTON MOTIVE FORCE in MITOCHONDRIA used to drive the synthesis of ATP.Base Sequence: The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.Binding Sites: The parts of a macromolecule that directly participate in its specific combination with another molecule.Molecular Chaperones: A family of cellular proteins that mediate the correct assembly or disassembly of polypeptides and their associated ligands. Although they take part in the assembly process, molecular chaperones are not components of the final structures.Luteoviridae: A family of RNA plant viruses infecting disparate plant families. They are transmitted by specific aphid vectors. There are three genera: LUTEOVIRUS; Polerovirus; and Enamovirus.Cloning, Molecular: The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells.Cercopithecidae: The family of Old World monkeys and baboons consisting of two subfamilies: CERCOPITHECINAE and COLOBINAE. They are found in Africa and part of Asia.Recombinant Proteins: Proteins prepared by recombinant DNA technology.Protein Conformation: The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).Protein Folding: Processes involved in the formation of TERTIARY PROTEIN STRUCTURE.Mitochondrial Membranes: The two lipoprotein layers in the MITOCHONDRION. The outer membrane encloses the entire mitochondrion and contains channels with TRANSPORT PROTEINS to move molecules and ions in and out of the organelle. The inner membrane folds into cristae and contains many ENZYMES important to cell METABOLISM and energy production (MITOCHONDRIAL ATP SYNTHASE).

Cyclophilin A is a secreted growth factor induced by oxidative stress. (1/314)

Reactive oxygen species have been implicated in the pathogenesis of atherosclerosis, hypertension, and restenosis, in part by promoting vascular smooth muscle cell (VSMC) growth. Many VSMC growth factors are secreted by VSMC and act in an autocrine manner. Here we demonstrate that cyclophilin A (CyPA), a member of the immunophilin family, is secreted by VSMCs in response to oxidative stress and mediates extracellular signal-regulated kinase (ERK1/2) activation and VSMC growth by reactive oxygen species. Human recombinant CyPA can mimic the effects of secreted CyPA to stimulate ERK1/2 and cell growth. The peptidyl-prolyl isomerase activity is required for ERK1/2 activation by CyPA. In vivo, CyPA expression and secretion are increased by oxidative stress and vascular injury. These findings are the first to identify CyPA as a secreted redox-sensitive mediator, establish CyPA as a VSMC growth factor, and suggest an important role for CyPA and enzymes with peptidyl-prolyl isomerase activity in the pathogenesis of vascular diseases.  (+info)

Cyclophilin A regulates HIV-1 infectivity, as demonstrated by gene targeting in human T cells. (2/314)

The human immunodeficiency virus type 1 (HIV-1) Gag polyprotein binds most members of the cyclophilin family of peptidyl-prolyl isomerases. Of 15 known human cyclophilins, cyclophilin A (CypA) has been the focus of investigation because it was detected in HIV-1 virions. To determine whether CypA promotes HIV-1 replication, we deleted the gene encoding CypA (PPIA) in human CD4(+) T cells by homologous recombination. HIV-1 replication in PPIA(-/-) cells was decreased and not inhibited further by cyclosporin or gag mutations that disrupt Gag's interaction with cyclophilins, indicating that no other cyclophilin family members promote HIV-1 replication. The defective replication phenotype was specific for wild-type HIV-1 since HIV-2/SIV isolates, as well as HIV-1 bearing a gag mutation that confers cyclosporin resistance, replicated the same in PPIA(+/+) and PPIA(-/-) cells. Stable re-expression of CypA in PPIA(-/-) cells restored HIV-1 replication to an extent that correlated with steady-state levels of CypA. Finally, virions from PPIA(-/-) cells possessed no obvious biochemical abnormalities but were less infectious than virions from wild-type cells. These data formally demonstrate that CypA regulates the infectivity of HIV-1 virions.  (+info)

Palmitoylation of caveolin-1 in endothelial cells is post-translational but irreversible. (3/314)

Caveolin-1 is a palmitoylated protein involved in assembly of signaling molecules in plasma membrane subdomains termed caveolae and in intracellular cholesterol transport. Three cysteine residues in the C terminus of caveolin-1 are subject to palmitoylation, which is not necessary for caveolar targeting of caveolin-1. Protein palmitoylation is a post-translational and reversible modification that may be regulated and that in turn may regulate conformation, membrane association, protein-protein interactions, and intracellular localization of the target protein. We have undertaken a detailed analysis of [(3)H]palmitate incorporation into caveolin-1 in aortic endothelial cells. The linkage of palmitate to caveolin-1 was hydroxylamine-sensitive and thus presumably a thioester bond. However, contrary to expectations, palmitate incorporation was blocked completely by the protein synthesis inhibitors cycloheximide and puromycin. In parallel experiments to show specificity, palmitoylation of aortic endothelial cell-specific nitric-oxide synthase was unaffected by these reagents. Inhibitors of protein trafficking, brefeldin A and monensin, blocked caveolin-1 palmitoylation, indicating that the modification was not cotranslational but rather required caveolin-1 transport from the endoplasmic reticulum and Golgi to the plasma membrane. In addition, immunophilin chaperones that form complexes with caveolin-1, i.e. FK506-binding protein 52, cyclophilin A, and cyclophilin 40, were not necessary for caveolin-1 palmitoylation because agents that bind immunophilins did not inhibit palmitoylation. Pulse-chase experiments showed that caveolin-1 palmitoylation is essentially irreversible because the release of [(3)H]palmitate was not significant even after 24 h. These results show that [(3)H]palmitate incorporation is limited to newly synthesized caveolin-1, not because incorporation only occurs during synthesis but because the continuous presence of palmitate on caveolin-1 prevents subsequent repalmitoylation.  (+info)

Structural consequences of cyclophilin A binding on maturational refolding in human immunodeficiency virus type 1 capsid protein. (4/314)

While several cellular proteins are incorporated in the human immunodeficiency virus type 1 virion, cyclophilin (CyP) A is the only one whose absence has been demonstrated to impair infectivity. Incorporation of the cytosolic protein results from interaction with a highly exposed Pro-rich loop in the N-terminal region of the capsid (CA) domain of the precursor polyprotein, Pr55(Gag). Even when prevented from interacting with CyP A, Pr55Gag still forms particles that proceed to mature into morphologically wild-type virions, suggesting that CyP A influences a postassembly event. The nature of this CyP A influence has yet to be elucidated. Here, we show that while CyP A binds both Gag and mature CA proteins, the two binding interactions are actually different. Tryptophan 121 (W121) in CyP A distinguished the two proteins: a phenylalanine substitution (W121F) impaired binding of mature CA protein but not of Gag. This indicates the occurrence of a maturation-dependent switch in the conformation of the Pro-rich loop. A structural consequence of Gag binding to CyP A was to block this maturational refolding, resulting in a 24-kDa CA protein retaining the immature Pro-rich loop conformation. Using trypsin as a structure probe, we demonstrate that the conformation of the C-terminal region in mature CA is also a product of maturational refolding. Binding to wild-type CyP A altered this conformation, as indicated by a reduction in the accessibility of Cys residue(s) in the region to chemical modification. Hence, the end result of binding to CyP A, whether the Pro-rich loop is in the context of Gag or mature CA protein, is a structurally modified mature CA protein. The postassembly role of CyP A may be mediated through these modified mature CA proteins.  (+info)

Sanglifehrin A, a novel cyclophilin-binding immunosuppressant, inhibits IL-2-dependent T cell proliferation at the G1 phase of the cell cycle. (5/314)

Sanglifehrin A (SFA) is a novel immunosuppressive natural product that binds to cyclophilin but is structurally distinct from cyclosporin A (CsA). We have investigated the cellular and molecular mechanisms of the action of SFA in T lymphocytes. We show that SFA inhibits T cell proliferation induced by IL-2 with an IC(50) of 200 nM. Distinct from CsA, which also binds to cyclophilin, SFA does not affect calcium-dependent IL-2 production, although SFA enhanced IL-2 gene transcription in the same cells. SFA blocks T cell proliferation induced by IL-2 in G(1) with no appreciable effect on IL-2 receptor expression in a manner similar to that of the immunosuppressant rapamycin. Unlike rapamycin, however, SFA has no effect on the phosphorylation or enzymatic activity of p70(s6k) kinase, distinguishing SFA from rapamycin in their mode of action. SFA inhibits hyperphosphorylation of Rb and the activity of cyclin E-cyclin-dependent kinase 2 on IL-2 signaling. These results suggest that SFA has a novel mode of action in comparison with CsA, FK506, and rapamycin, and that its use as a molecular probe may lead to the discovery of a novel target involved in T cell activation.  (+info)

CD147 facilitates HIV-1 infection by interacting with virus-associated cyclophilin A. (6/314)

Cyclophilin A (CyPA) is specifically incorporated into the virions of HIV-1 and has been shown to enhance significantly an early step of cellular HIV-1 infection. Our preliminary studies implicated CD147 as a receptor for extracellular CyPA. Here, we demonstrate a role for CyPA-CD147 interaction during the early steps of HIV-1 infection. Expression of human CD147 increased infection by HIV-1 under one-cycle conditions. However, susceptibility to infection by viruses lacking CyPA (simian immunodeficiency virus or HIV-1 produced in the presence of cyclosporin A) was unaffected by CD147. Virus-associated CyPA coimmunoprecipitated with CD147 from infected cells. Antibody to CD147 inhibited HIV-1 entry as evidenced by the delay in translocation of the HIV-1 core proteins from the membrane and inhibition of viral reverse transcription. Viruses whose replication did not require CyPA (SIV or mutant HIV-1) were resistant to the inhibitory effect of anti-CD147 antibody. These results suggest that HIV-1 entry depends on an interaction between virus-associated CyPA and CD147 on a target cell.  (+info)

A partially folded intermediate species of the beta-sheet protein apo-pseudoazurin is trapped during proline-limited folding. (7/314)

The folding of apo-pseudoazurin, a 123-residue, predominantly beta-sheet protein with a complex Greek key topology, has been investigated using several biophysical techniques. Kinetic analysis of refolding using far- and near-ultraviolet circular dichroism (UV CD) shows that the protein folds slowly to the native state with rate constants of 0.04 and 0.03 min(-1), respectively, at pH 7.0 and at 15 degrees C. This process has an activation enthalpy of approximately 90 kJ/mole and is catalyzed by cyclophilin A, indicating that folding is limited by trans-cis proline isomerization, presumably around the Xaa-Pro 20 bond that is in the cis isomer in the native state. Before proline isomerization, an intermediate accumulates during folding. This species has a substantial signal in the far-UV CD, a nonnative signal in the near-UV CD, exposed hydrophobic surfaces (judged by 1-anilino naphthalenesulphonate binding), a noncooperative denaturation transition, and a dynamic structure (revealed by line broadening on the nuclear magnetic resonance time scale). We compare the properties of this intermediate with partially folded states of other proteins and discuss its role in folding of this complex Greek key protein.  (+info)

Cyclophilin a binds to peroxiredoxins and activates its peroxidase activity. (8/314)

Six distinct peroxiredoxin (Prx) proteins (Prx I-VI) from distinct genes have been identified in mammalian tissues. Prxs are members of a group of peroxidases that have conserved reactive cysteine residue(s) in the active site(s). An immediate physiological electron donor for the peroxidase catalysis for five Prx proteins (Prx I-V) has been identified as thioredoxin (Trx), but that for Prx VI (1-Cys Prx) is still unclear. To identify an immediate electron donor and a binding protein for Prx VI, we performed a Prx VI protein overlay assay. A 20-kDa binding protein was identified by the Prx VI protein overlay assay with flow-through fractions from a High-Q column with rat lung crude extracts. Using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) and MS-Fit, we identified the 20-kDa Prx VI-binding protein as a cyclophilin A (CyP-A). The binding of recombinant human CyP-A (hCyP-A) to Prx VI was confirmed by using the hCyP-A protein overlay assay and Western immunoblot analysis with hCyP-A-specific antibodies. hCyP-A enhanced the antioxidant activity of Prx VI, as well as the other known mammalian Prx isotypes. hCyP-A supported antioxidant activity of Prx II and Prx VI both against thiol (dithiothreitol)-containing metal-catalyzed oxidation (MCO) systems and ascorbate-containing MCO systems. Prx II was reduced by hCyP-A without help from any other reductant, and the reduction was cyclosporin A-independent. These results strongly suggest that CyP-A not only binds to Prx proteins but also supports its peroxidase activity as an immediate electron donor. In addition, Cys(115) and Cys(161) of hCyP-A were found to be involved in the activation and the reduction of Prx.  (+info)

Cyclophilin (Cyp) A has been reported to be overexpressed in the majority of cancer cells, including hepatocellular carcinoma (HCC). However, the biological functions of CypA in HCC are far from being understood. To determine the biological functions of CypA in HCC, the present study screened human fetal liver complementary DNA for proteins interacting with CypA using the yeast two-hybrid system. A nuclear protein, serine/arginine-rich (SR)-25, was isolated as a novel CypA-binding protein that is distinct from those previously described in the literature. Binding assays and co-immunoprecipitation confirmed the physical association between CypA and SR-25. The present study demonstrated that CypA may interact with SR-25 through its peptidyl-prolyl isomerase domain. In addition, CypA may induce the expression of SR-25 in Hep3B cells. The messenger RNA levels of CypA and SR-25 in HCC indicated that there was a significant correlation between the expression of CypA and the expression of SR-25 in HCC. It can
The host protein cyclophilin A (CypA) can both stimulate and inhibit HIV-1 infection through its interaction with the viral capsid (CA). CypA enhances the early stages of HIV-1 infection in part by promoting nuclear import of the virus; while the details of its ability to inhibit HIV-1 infection are less clear. This thesis advances our understanding of the mechanisms underlying the ability of CypA to inhibit HIV-1 infection. I demonstrate that CypA inhibits nuclear import of HIV-1 in the presence of inhibitory capsid-binding host proteins TRIM5α and CPSF6, and that inhibition is not a consequence of increased binding of inhibitory factors to the viral capsid. My work also demonstrates that CypA-dependent inhibition depends in part, on a conserved domain of HIV-1 CA which determines interactions with host nuclear pore proteins. These results suggest a common mechanism underlies the ability of CypA to stimulate HIV-1 infectivity in some cells and to inhibit infection in others. ...
Cyclophilin H / PPIH, 0.5 mg. Cyclophilin H (also known as peptidylpropyl isomerase H, PPIH) is a member of peptidyl-propyl cis-trans isomerase (PPIase) family, which catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides
Background: Cyclophilin A (CyPA, encoded by Ppia) is a ubiquitously expressed protein secreted in response to pro-inflammatory stimuli. CyPA stimulates VSMC migration and proliferation, endothelial cell adhesion molecule expression and inflammatory cell chemotaxis. Given these activities, we hypothesized that CyPA is pro-atherogenic.. Methods and Results: In the high cholesterol diet fed Apoe-/- mouse CyPA deficiency led to a reduction of atherosclerosis (% Oil Red O, en face aorta; 19.3±7.5 in Apoe-/- vs. 8.2±2.0 in Apoe-/-Ppia-/- mice, P,0.01). CyPA deficiency was associated with decreased LDL uptake, inflammatory cell accumulation, and apoptosis. Moreover, en face staining of aortic tissues showed that VCAM-1 expression was significantly reduced in mice lacking CyPA. Importantly, eNOS protein expression was significantly higher in the Apoe-/-Ppia-/- mice compared to Apoe-/- mice. To define the mechanisms responsible for decreased eNOS expression, the effect of altering CyPA levels in ...
References for Abcams Recombinant human Cyclophilin 40 protein (ab78815). Please let us know if you have used this product in your publication
When human immundeficiency virus (HIV) infects a human cell, it releases into the interior of the cell its capsid (made of about 1,300 identical so-called CA proteins), a closed, stable container that protects the viral genetic material (see also June 2013 highlight Elusive HIV-1 Capsid and August 2015 highlight Anatomy of a Dormant Killer). Once in the cell ― while avoiding detection by cellular proteins ― the capsid deceives the cell and directs the cell machinery to transport it to the nucleus. The human-cell protein Cyclophilin A (CypA) is thereby exploited to act against the cells well being and to assist the HIV infection by getting the capsid to access the cell nucleus; this results in a delicate choreography accomplished by escaping anti-viral proteins in the cell and deceiving transport proteins at the nucleus, all of which contain a CypA domain that interacts directly with the capsid. Despite the availability of the crystal structure of the complex of CypA and CA proteins ...
NOVEL RNAi THERAPEUTIC FOR TREATMENT OF HEPATITIS C INFECTION - Small interfering RNAs (siRNAs) or small hairpin RNA (shRNAs) and compositions comprising same are provided that specifically target human cyclophilin A (CyPA) to effectively inhibit Hepatitis C(HCV) infection in a cell. Such siRNA and shRNAs may have a length of from about 19 to about 29 contiguous nucleotides corresponding to a specific region of human cyclophilin A (CyPA) cDNA of from about nucleotide 155 to about nucleotide 183 having particular potency against CyPA and HCV. Such siRNA and shRNAs may be formulated as naked compositions or as pharmaceutical compositions. DNA polynucleotides, plasmids, and viral or non-viral vectors are also provided that encode siRNA or shRNA molecules, which may be delivered directly to cells or in combination with known delivery agents, such as lipids, polymers, encapsulated lipid particles, such as liposomes. Methods for treating, managing inhibiting, preventing, etc., HCV infection using such ...
Researchers at the University of Rochester Medical Center in New York said removing the gene that makes the protein cyclophilin A protected mice genetica
The HIV-1 capsid is an important determinant of viral replication. Early studies demonstrated the intrinsic importance of the capsid in mediating uncoating of t...
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TY - JOUR. T1 - Is cyclophilin involved in the immunosuppressive and nephrotoxic mechanism of action of cyclosporin A?. AU - Sigal, N. H.. AU - Dumont, F.. AU - Durette, P.. AU - Siekierka, John. AU - Peterson, L.. AU - Rich, D. H.. AU - Dunlap, B. E.. AU - Staruch, M. J.. AU - Melino, M. R.. AU - Koprak, S. L.. AU - Williams, D.. AU - Witzel, B.. AU - Pisano, J. M.. PY - 1991/1/1. Y1 - 1991/1/1. N2 - In this report we have approached two questions relating to the mechanism of action of cyclosporin A (CsA). First, we address whether the major cytosolic protein for CsA, cyclophilin, is directly involved in mediating the immunosuppressive activity of this drug, and, in particular, whether inhibition of this proteins peptidyl-prolyl cis-trans isomerase (PPIase) activity results in inhibition of murine T cell activation. Second, we ask whether the nephrotoxicity observed with CsA is related to inhibition of PPIase-dependent pathways in cells other than lymphocytes. Using a series of 61 cyclosporin ...
A critical role of Cyclophilins, mostly Cyclophilin A (CyPA), in the replication of HCV is supported by a growing body of in vitro and in vivo evidence. CyPA probably interacts directly with nonstructural protein 5A to exert its effect, through its peptidyl-prolyl isomerase activity, on maintaining the proper structure and function of the HCV replicase. The major proline substrates are located in domain II of NS5A, centered around a
The mitochondrial permeability transition pore (PTP) has been established as an important mediator of ischemia-reperfusion-induced cell death. The matrix protein cyclophilin D (CypD) is the best known regulator of PTP opening. Therefore, the authors hypothesized that isoflurane, by inhibiting the re...
DEB025 (Alisporivir) inhibits hepatitis C virus replication by preventing a cyclophilin A induced cis-trans isomerisation in domain II of ...
To find and calibrate a robust and reliable computational protocol for mapping conformational space of medium-sized molecules, exhaustive conformational sampling has been carried out for the series of seven macrocyclic compounds of varying ring size and one acyclic analogue. While five of them were taken from the MD/LLMOD/force-field study by Shelley and coworkers (J. Chem. Inf. MODEL: 2014, 54, 2680), three represent potential macrocyclic inhibitors of human cyclophilin A. The free energy values (GDFT/COSMO-RS) for all conformers of each compound were obtained by the composite protocol based on the in vacuo quantum mechanics (DFT-D3 method in a large basis set), standard gas-phase thermodynamics and the COSMO-RS solvation model (QM+COSMO-RS ...
Hepatic fibrosis can result as a pathological response to nonalcoholic steatohepatitis (NASH). Cirrhosis, the late stage of fibrosis, has been linked to poor survival and an increased risk of developing hepatocellular carcinoma, with limited treatment options available. Therefore, there is an unmet …
3RCL: Fragment-based discovery of a new family of non-peptidic small-molecule cyclophilin inhibitors with potent antiviral activities.
ProSpecs Cyclophilins include: Cyclophilin-A Human Recombinant, Cyclophilin-B Human Recombinant, Cyclophilin-D Human Recombinant
PPIL1 antibody [N1C3] (peptidylprolyl isomerase (cyclophilin)-like 1) for ICC/IF, WB. Anti-PPIL1 pAb (GTX118126) is tested in Human samples. 100% Ab-Assurance.
ARZNEIMITTELENTWICKLUNG + ARZNEIMITTELDESIGN + ARZNEIMITTELENTDECKUNG; ORGANISCHE SYNTHESE (CHEMIE); PEPTIDYLPROLYL-ISOMERASE, CYCLOPHILIN (ENZYME); ENZYMINHIBITOREN (BIOCHEMIE); DRUG DEVELOPMENT + DRUG DESIGN + DRUG DISCOVERY (PHARMACY); ORGANIC SYNTHESIS (CHEMISTRY); PEPTIDYLPROLYL ISOMERASE, CYCLOPHILIN (ENZYMES); ENZYME INHIBITORS (BIOCHEMISTRY ...
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Keywords: HIV; Herpes; Host Factors; Host-Pathogen Interactions; Innate Immunity; Infection; Viruses; Restriction; Cyclophilin; TRIM5; Tetherin; Tropism; Gene ...
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Author Summary Cyclophilins are proteins that catalyze the isomerization of prolines, interconverting this structurally important amino acid between cis and trans isomers. Although there are 17 cyclophilins in the human genome, the function of most cyclophilin isoforms is unknown. At least some members of this protein family are of interest for clinically relevant drug design, as they are targets of the drug cyclosporin, which is used as an immunosuppressant to treat patients following organ transplantation. The absence of a comprehensive picture of the similarities and differences between the different members of this protein family precludes effective and specific drug design, however. In the current study we undertake such a global structure∶function analysis. Using biochemical, structural, and computational methods we characterize the human cyclophilin family in detail and suggest that there is a previously overlooked region of these enzymes that contributes significantly to isoform diversity. We
Author Summary Cyclophilins are proteins that catalyze the isomerization of prolines, interconverting this structurally important amino acid between cis and trans isomers. Although there are 17 cyclophilins in the human genome, the function of most cyclophilin isoforms is unknown. At least some members of this protein family are of interest for clinically relevant drug design, as they are targets of the drug cyclosporin, which is used as an immunosuppressant to treat patients following organ transplantation. The absence of a comprehensive picture of the similarities and differences between the different members of this protein family precludes effective and specific drug design, however. In the current study we undertake such a global structure∶function analysis. Using biochemical, structural, and computational methods we characterize the human cyclophilin family in detail and suggest that there is a previously overlooked region of these enzymes that contributes significantly to isoform diversity. We
Cyclophilin A (CypA) is the main member of the immunophilin superfamily that has peptidyl-prolyl cis-trans isomerase activity. CypA participates in protein folding, cell signaling, inflammation and tumorigenesis. Further, CypA plays critical roles in the replication of several viruses. Upon influenza virus infection, CypA inhibits viral replication by interacting with the M1 protein. In addition, CypA is incorporated into the influenza virus virions. Finally, Cyclosporin A (CsA), the main inhibitor of CypA, inhibits influenza virus replication through CypA-dependent and -independent pathways. This review briefly summarizes recent advances in understanding the roles of CypA during influenza virus infection.
TY - JOUR. T1 - Novel approach to inhibit asthma-mediated lung inflammation using Anti-CD147 intervention. AU - Gwinn, William M.. AU - Damsker, Jesse M.. AU - Falahati, Rustom. AU - Okwumabua, Ifeanyi. AU - Kelly-Welch, Ann. AU - Keegan, Achsah D.. AU - Vanpouille, Christophe. AU - Lee, James J.. AU - Dent, Lindsay A.. AU - Leitenberg, David. AU - Bukrinsky, Michael I.. AU - Constant, Stephanie L.. PY - 2006/10/1. Y1 - 2006/10/1. N2 - Extracellular cyclophilins have been well described as chemotactic factors for various leukocyte subsets. This chemotactic capacity is dependent upon interaction of cyclophilins with the cell surface signaling receptor CD147. Elevated levels of extracellular cyclophilins have been documented in several inflammatory diseases. We propose that extracellular cyclophilins, via interaction with CD147, may contribute to the recruitment of leukocytes from the periphery into tissues during inflammatory responses. In this study, we examined whether extracellular ...
Cyclophilin antibody for detecting human peptidyl-prolyl cis-trans isomerase A. Validated on up to 12 cell lysates for western blotting. Try a trial size today.
Cyclophilin B, 0.1 ml. PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides.
A validated positive silencing control targeting the Cyclophilin B (PPIB) gene in human, mouse, or rat cell lines. Useful for determination of optimal RNAi experimental conditions
Figure 3. Genetically encoded N-epsilon lysine acetylation allows the high resolution X-ray structures of acetylated proteins and their complexes to be solved. The high resolution structure of acetyl lysine from acetylated cyclophilin (left) showing the experimental density. Right, Acetylated cyclophilin in complex with cyclosporine. Water molecules (blue spheres) that are ordered at the protein small molecule interface in the unacetylated complex) rearrange in the acetylated complex.. The acetylation of a cyclophilin at Lys125 was identified in a proteomics screen. We subsequently demonstrated that a substantial proportion of CYPA is acetylated in HeLa cells and human T cell lines, suggesting that the acetylated form of the protein is biologically relevant. To test this, recombinant CYPA bearing homogenous acetylation at Lys125 was prepared by overexpression in E. coli using an acetyllysyl-tRNA synthetase-tRNACUA pair, allowing detailed biophysical and enzymatic characterization of acetylated ...
Cyclophilin C-associated protein (CyCAP) has been proposed as the endogenous equivalent of the immunosuppressant drug, cyclosporin A. It competes with cyclosporin A for binding to cyclophilin C. It is also known as lectin, galactoside-binding, soluble, 3 binding protein (Lgals3bp); Cyp-C-associated protein, 90K, Ppicap, and MAC-2BP. CyCAP expression has been reported in brain, kidney, macrophage cells, dermal fibroblasts, and keratinocytes. Roles for CyCAP have been reported in wound healing and macrophage activation via association with nuclear factor of activated T-cells (NFAT).. ...
Cyclophilin C-associated protein (CyCAP) has been proposed as the endogenous equivalent of the immunosuppressant drug, cyclosporin A. It competes with cyclosporin A for binding to cyclophilin C. It is also known as lectin, galactoside-binding, soluble, 3 binding protein (Lgals3bp); Cyp-C-associated protein, 90K, Ppicap, and MAC-2BP. CyCAP expression has been reported in brain, kidney, macrophage cells, dermal fibroblasts, and keratinocytes. Roles for CyCAP have been reported in wound healing and macrophage activation via association with nuclear factor of activated T-cells (NFAT).. ...
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ppiase, cyp37, peptidyl-prolyl, cis-trans, isomerase, cyp37, chloroplastic, PPIase CYP37 | peptidyl-prolyl cis-trans isomerase CYP37, chloroplastic, P82869, ABF57273.1, AS10 1589
PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides.
Drug-induced mitochondrial dysfunction has been implicated in many types of organ toxicity, including liver and intestine. The induction of the mitochondrial permeability transition (mPT) has been seen as a mechanism of this toxicity. The mitochondrial matrix protein cyclophilin D (CypD) is a key regulator of the mPT, lending itself as a potential target for therapeutic intervention. The overall aim of this research project is to explore the mPT as a potential mediator of drug-induced mitochondrial toxicity in intestine and liver. Small intestinal ulceration is a frequent and serious adverse effect associated with the use of non-steroidal anti-inflammatory drugs. Mitochondria have been implicated in ulcer development. We have shown that inhibition of the mPT pore by pharmacologic blockade of CypD resulted in significant protection from diclofenac injury in cultured enterocytes and a 70% reduction in intestinal ulcers in mice. Furthermore, Ppif-/- (the gene encoding CypD) mice show 80% ulcer reduction
Calcium modulating ligand (CAMLG or CAML), also known as calcium-modulating cyclophilin ligand, is a signalling protein recognized by the TNF receptor TACI. The immunosuppressant drug cyclosporin A blocks a calcium-dependent signal from the T-cell receptor (TCR) that normally leads to T-cell activation. When bound to cyclophilin B, cyclosporin A binds and inactivates the key signaling intermediate calcineurin. The protein encoded by this gene functions similarly to cyclosporin A, binding to cyclophilin B and acting downstream of the TCR and upstream of calcineurin by causing an influx of calcium. This integral membrane protein appears to be a new participant in the calcium signal transduction pathway, implicating cyclophilin B in calcium signaling, even in the absence of cyclosporin. CAMLG has been shown to interact with TNFRSF13B. GRCh38: Ensembl release 89: ENSG00000164615 - Ensembl, May 2017 GRCm38: Ensembl release 89: ENSMUSG00000021501 - Ensembl, May 2017 "Human PubMed Reference:". "Mouse ...
PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides (By similarity).
Peptidyl-prolyl Cis-trans Isomerase (cyclophilin); Catalyzes The Cis-trans Isomerization Of Peptide Bonds N-terminal To Proline Residues; Plays A Role In Determining Prion Variants; Binds To Hsp82p And Contributes To Chaperone Activity; Protein Abundance Increases In Response To DNA Replication Stress
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Polyclonal antibody for Cyclophilin B/PPIB detection. Host: Rabbit.Size: 100μg/vial. Tested applications: IHC-P. Reactive species: Human. Cyclophilin B/PPIB information: Molecular Weight: 23743 MW; Subcellular Localization: Endoplasmic reticulum lumen. Me
The PDB archive contains information about experimentally-determined structures of proteins, nucleic acids, and complex assemblies. As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
2004). Patz EF Jr: Translating biomarkers into clinical practice: prognostic implications of cyclophilin A and macrophage migratory inhibitory factor identified from protein expression profiles in non-small cell lung cancer. Lung Cancer ...
This work has been made available to the staff and students of the University of Sydney for the purposes of research and study only. It constitutes material that is held by the University for the purposes of reporting for HERDC and the ERA. This work may not be downloaded, copied and distributed to any third party ...
Zhu C, Wang X, Deinum J, Huang Z, Gao J, Modjtahedi N, Neagu MR, Nilsson M, Eriksson PS, Hagberg H, Luban J, Kroemer G, Blomgren K. Cyclophilin A participates in the nuclear translocation of apoptosis-inducing factor in neurons after cerebral hypoxia-ischemia. J Exp Med. 2007 Aug 6; 204(8):1741-8 ...
Deposition date: 2017-06-22 Original release date: 2018-02-02. Authors: Acevedo, Lucila; Nicholson, Linda. Citation: Acevedo, Lucila; Nicholson, Linda. "1H, 13C and 15N NMR assignments of cyclophilin LRT2 (OsCYP2) from rice" Biomol. NMR Assignments 12, 171-174 (2018).. Assembly members: ...
7) X. Pang, M. J. Zhang, L. X. Zhou, F. Xie, H. Lu, W. He, S. B. Jiang, L. Yu and X. Y. Zhang. (2011) Discovery of a Potent Peptidic Cyclophilin A Inhibitor Trp-Gly-Pro. European Journal of Medicinal Chemistry. 46, 1701- ...
A stable, fluorescent positive control suitable for RNAi experiments in human, mouse, or rat cells Silences the Cyclophilin B gene and is labeled with DY-547
One of the rate-limiting steps in protein folding has been shown to be the cis-trans isomerization of proline residues, which is catalyzed by a range of peptidylprolyl cis-trans isomerases. To characterize the interaction between model peptides and the periplasmic peptidylprolyl cis-trans isomerase SurA from E. coli, we employed a chemical cross-linking strategy that has been used previously to elucidate the interaction of substrates with other folding catalysts. The interaction between purified SurA and model peptides was significant in that it showed saturation and was abolished by denaturation of SurA; however the interaction was independent of the presence of proline residues in the model peptides. From results obtained by limited proteolysis we conclude that an N-terminal fragment of SurA, comprising 150 amino acids that do not contain the active sites involved in the peptidylprolyl cis-trans isomerization, is essential for the binding of peptides by SurA. This was confirmed by probing the ...
Cyclosporins, in particular the nonimmunosuppressive derivative SDZ NIM 811, exhibit potent anti-human immunodeficiency virus type 1 (HIV-1) activity in vitro. SDZ NIM 811 interferes at two stages of the viral replication cycle: (i) translocation of the preintegration complex to the nucleus and (ii) production of infectious virus particles. Immunosuppressive activity is not correlated with anti-HIV-1 activity of cyclosporins. However, binding to cyclophilin A, the major cellular receptor protein of cyclosporins, is a prerequisite for HIV inhibition: all structural changes of the cyclosporin A molecule leading to loss of affinity to cyclophilin abolished the antiviral effect. Cyclosporin derivatives did not interact directly with HIV-1 proteins; cyclophilin was the only detectable receptor protein for antivirally active cyclosporins. There is no evidence that inhibition of HIV occurs via a gain of function of cyclophilin in the presence of cyclosporins: the complex of cyclophilin A with SDZ NIM ...
The protein encoded by this gene is a member of the immunophilin protein family, which play a role in immunoregulation and basic cellular processes involving protein folding and trafficking. This encoded protein is a cis-trans prolyl isomerase that binds the immunosuppressants FK506 and rapamycin. It is thought to function as an ER chaperone and may also act as a component of membrane cytoskeletal scaffolds. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Sep 2008 ...
This gene is a member of the cyclophilin family of peptidylprolyl isomerases. The cyclophilins are a highly conserved family, members of which play an important role in protein folding, immunosuppression by cyclosporin A, and infection of HIV-1 virions. [provided by RefSeq, Jul 2008 ...
The presence and abundance of 5-HT1A and 5-HT2A receptor mRNAs in post mortem human hippocampus was investigated using a novel quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) technique using cyclophilin mRNA as an internal standard. 5-HT1A and 5-HT2A receptor mRNAs were each co-amplified with varying dilutions of cyclophilin primers, and their abundance expressed as a ratio of cyclophilin mRNA. Using this technique in combination with quantitative autoradiography we have investigated the effect of aging on hippocampal 5-HT1A and 5-HT2A receptor mRNA abundance and binding site densities. There was a significant negative correlation between hippocampal 5-HT1A receptor binding site densities and age and a similar trend for 5-HT1A receptor mRNA abundance. Neither 5-HT2A receptor binding site densities nor mRNA abundance were affected by age. Both 5-HT1A and 5-HT2A receptor binding site densities in individual subjects correlated significantly with abundance of their encoding mRNA. This
31 ppia TaqMan 5-nuclease assay chemistry provides a fast and simple way to get single nucleotide polymorphism (SNP) genotyping results.
ContraVir is a biopharmaceutical company focused on the development and commercialization of targeted antiviral therapies with a specific focus on developing a potentially curative therapy for hepatitis B virus (HBV). The Company is developing two novel anti-HBV compounds with complementary mechanisms of action. TXL™ currently in Phase 2, is designed to deliver high intrahepatic concentrations of TFV, while minimizing off-target side-effects caused by high levels of circulating TFV. CRV431, the other anti-HBV compound, is a next-generation cyclophilin inhibitor with a unique structure that increases its potency and selective index against HBV. ContraVir is also developing Valnivudine™, an orally available nucleoside analogue prodrug; Valnivudine™ is currently in Phase 3 for the treatment of herpes zoster. In addition to direct antiviral activity, Phase 2 data suggest that Valnivudine™ has the potential to reduce the incidence of debilitating shingles-associated pain known as ...
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Recombinant Peptidylprolyl Isomerase B (Cyclophilin B) (PPIB) Peptide. Species: Human. Source: Escherichia coli (E. coli). Order product ABIN934947.
As a continuation of our previous discovery of the interaction of CypA with Vpr, these interactions have in this work been characterized in detail at atomic resolution. Direct experimental evidence that all four conserved Pro residues in Vpr undergo cis/trans isomerism in aqueous solution at pH 7 that is catalyzed by CypA was achieved. Only small amounts of enzyme are required and the NMR method is sufficiently sensitive to detect these effects in ratios of substrate to enzyme as high as 672:1.. The apparent differentiation between the results originating from interaction studies performed by NMR spectroscopy and SPR indicates a different additional mode of interaction observed in the latter case. The fact that only N-terminal Vpr peptides containing Pro-35 bind to CypA in the Biacore assay and strong binding is maintained in the heptapeptide s Vpr32-38, although CypA also catalyzes prolyl cis/trans interconversions of Pro-5, 10 and 14 of s Vpr1-20 as shown by NMR spectroscopy at atomic ...
Cyclophilin A Maintains Glioma-Initiating Cell Stemness by Regulating Wnt/β-Catenin Signaling Researchers demonstrated that cyclophilin A (CypA) promotes glioma-initiating cells stemness, self-renewal, proliferation, and radiotherapy resistance. They found that CypA binds β-catenin and is recruited to Wnt target gene promoters. [Clin Cancer Res] Abstract HMGB1 Released by Autophagic Cancer-Associated Fibroblasts Maintains the Stemness of Luminal Breast Cancer Cells The authors found that the presence of cancer associated fibroblasts (CAFs) containing high levels of LC3II, a maker of autophagosomes, was associated with more aggressive luminal human breast cancer. CAFs in human luminal breast cancer tissues with high autophagy activity enriched breast cancer initiating cells with increased tumorigenicity. [J Pathol] Abstract Nanoemulsion Formulation of a Novel Taxoid DHA-SBT-1214 Inhibits Prostate Cancer Stem Cell-Induced Tumor Growth Scientists evaluated the therapeutic efficacy of an ...
PIN1 was recently identified as a peptidyl-prolyl cis-trans isomerase (PPIase). It binds to and isomerizes specific pSer/Thr-Pro motifs and catalytically induces conformational changes after phosphorylation. PIN1 plays an important role in several ce
A new collaboration agreement has been signed between the Swedish company NeuroVive Pharmaceutical AB and Karolinska Institutet, Stockholm in order to develop NeuroVives cyclophilin inhibitor compound NV556 for the treatment of mitochondrial myopathy, an area of high unmet medical need of new and e...
Peptidyl-prolyl isomerases (PPIases) are a well conserved class of enzymes found throughout nature in microorganisms, plants and animals. They are characterized by their ability to catalyze the conversion of cis- and trans- peptidyl-proline bonds in proteins and consequently are able to exert control over target protein structure and function.
The primary goal of this project is to continue to select adjuvants that can maximize the host immune responses against Neospora antigens. The Neospora cyclophilin (NcCyP) was selected to be the vaccine candidate for this project. This protein was highly expressed in E. coli in a soluble form. Experiments were conducted to characterize the two potent adjuvants identified in previous studies. The results showed that NcCyP stimulated production of interferon-gamma (an inflammatory cytokine) and lymphocyte proliferation only in animals vaccinated with a formulation comprised of NcCyP and one of the two potent adjuvants. These studies confirmed the efficacy of the Pfizer adjuvants which will be used in a vaccine trial in the small ruminant neosporosis model. ...
Intracellular pH must be kept close to neutrality to be compatible with cellular functions, but the mechanisms of pH homeostasis and the responses to intracellular acidification are mostly unknown. In the plant Arabidopsis thaliana, we found that intracellular acid stress generated by weak organic acids at normal external pH induces expression of several chaperone genes, including ROF2, which encodes a peptidyl-prolyl cis-trans isomerase of the FK506-binding protein class. Loss of function of ROF2, and especially double mutation of ROF2 and the closely related gene ROF1, results in acid sensitivity. Over-expression of ROF2 confers tolerance to intracellular acidification by increasing proton extrusion from cells. The activation of the plasma membrane proton pump (H+-ATPase) is indirect: over-expression of ROF2 activates K+ uptake, causing depolarization of the plasma membrane, which activates the electrogenic H+ pump. The depolarization of ROF2 over-expressing plants explains their tolerance to ...
Escherichia coli synthesizes at least three [NiFe]-hydrogenase enzymes that catalyze the production or consumption of hydrogen gas and occupy a central place in cellular energy metabolism (4, 17). Multiple accessory proteins are required for the assembly of the bimetallic catalytic cluster of these enzymes, including the proteins encoded by the hyp genes and slyD (3, 7, 12). SlyD, which contributes to the insertion of nickel into the hydrogenase precursor proteins and cellular nickel accumulation (18), consists of a peptidyl-prolyl isomerase (PPIase) domain as well as a molecular chaperone domain and a C-terminal tail rich in metal-binding residues (10, 14, 15). A combination of in vitro and in vivo experiments demonstrated that both the metal-binding domain and the chaperone activity of SlyD are essential components of its function in hydrogenase production (13), but the role of SlyDs PPIase activity in the hydrogenase maturation pathway was unknown.. The crystal structure of Methanococcus ...
TY - JOUR. T1 - G2 Cell Cycle Arrest and Cyclophilin A in Lentiviral Gene Transfer. AU - Zhang, Shangming. AU - Joseph, Guiandre. AU - Pollok, Karen. AU - Berthoux, Lionel. AU - Sastry, Lakshmi. AU - Luban, Jeremy. AU - Cornetta, Kenneth. PY - 2006/10. Y1 - 2006/10. N2 - Lentiviral vectors derived from the human immunodeficiency virus-1 (HIV-1) have a higher propensity to transduce nondividing cells compared to vectors based on oncoretroviruses. We report here that genistein, a previously known protein tyrosine kinase (PTK) inhibitor and G2 cell cycle arrest inducer, significantly enhanced lentiviral transduction in a dose-dependent manner. Increased transduction, as measured by vector expression, was seen in a variety of human cell lines, murine primary lymphocytes, and primary human CD34+ peripheral blood progenitor cells as well. Increased vector expression was also associated with an increase in vector DNA copy number, as assessed by quantitative PCR. Genistein-mediated G2 cell cycle arrest, ...
Hereditäre equine dermale Asthenie (HERDA) ist eine autosomal rezessive Hautkrankheit, die vor allem junge Quarter Horses und verwandte Rassen betrifft. Die Symptome sind charakterisiert durch leichte Verletzbarkeit und erhöhte Dehnbarkeit der Haut, meist in der Satelllage. Die Prognose ist vorsichtig zu stellen, denn die Pferde können nicht normal zum Reiten eingesetzt werden und müssen oft euthanasiert werden. Beim Quarter Horse ist HERDA mit einer Mutation im Cyclophilin B Gen (PPIB) assoziiert. Cyclophilin B ist ein Enzym, welches für die Tripelhelixbildung von Kollagen wichtig ist. Wir beschreiben hier eine Schweizer Jährlings-Stute mit Symptomen von HERDA, aber ohne Mutation im PPIB Gen und bei der auch Ehlers-Danlos Typ IV, Typ VI, Typ VIIA, Typ VIIB und Typ VIIC (Dermatosparaxis) als ätiologische Ursache ausgeschlossen werden konnten.. Schlüsselwörter: Hereditäre equine regionale dermale Asthenie,Warmblutfohlen,rezessive Hautkrankheit,Kollagen. ...
Meier, Jeremy A. and Hyun, Moonjung and Cantwell, Marc and Raza, Ali and Mertens, Claudia and Raje, Vidisha and Sisler, Jennifer and Tracy, Erin and Torres-Odio, Sylvia and Gispert, Suzana and Shaw, Peter E. and Baumann, Heinz and Bandyopadhyay, Dipankar and Takabe, Kazuaki and Larner, Andrew C. (2017) Stress-induced dynamic regulation of mitochondrial STAT3 and its association with cyclophilin D reduces mitochondrial ROS production. Science Signaling, 10 (472). eaag2588. ISSN 1937-9145 ...
The spliceosome is a complex and dynamic collection of RNA and proteins that removes introns from precursor mRNA transcripts. Alterations in the splicing machin...
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In the hours and days following acute CNS injury, a secondary wave of events is initiated that exacerbate spinal tissue damage and neuronal cell death. A potential mechanism driving these secondary events is opening of the mitochondrial permeability transition pore (mPTP) and subsequent release of several cell death proteins. Previous studies have shown that inhibition of cyclophilin D(CypD), the key regulating component in mPTP opening, was protective against insults that induce necrotic cell death. We therefore hypothesized that CypD-null mice would show improved functional and pathological outcomes following spinal cord injury (SCI) and traumatic brain injury (TBI). Moderate and severe spinal contusion was produced in wild-type (WT) and CypD-null mice at the T-10 level using the Infinite Horizon impactor. Changes in locomotor function were evaluated using the Basso Mouse Scale (BMS) at 3 days post-injury followed by weekly testing for 4 weeks. Histological assessment of tissue sparing and lesion
This project is supported by the Canadian Institutes of Health Research (award #111062), Alberta Innovates - Health Solutions, and by The Metabolomics Innovation Centre (TMIC), a nationally-funded research and core facility that supports a wide range of cutting-edge metabolomic studies. TMIC is funded by Genome Alberta, Genome British Columbia, and Genome Canada, a not-for-profit organization that is leading Canadas national genomics strategy with funding from the federal government. Maintenance, support, and commercial licensing is provided by OMx Personal Health Analytics, Inc. Designed by Educe Design & Innovation Inc. ...
Looking for online definition of peptidylprolyl isomerase D in the Medical Dictionary? peptidylprolyl isomerase D explanation free. What is peptidylprolyl isomerase D? Meaning of peptidylprolyl isomerase D medical term. What does peptidylprolyl isomerase D mean?
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Research and training opportunities are available in a laboratory of the National Research Council of Italy for a postgraduate or postdoctoral student in the field of molecular parasitology. The laboratory is about to be relocated near Rome, in a multidisciplinary research complex comprising a European facility for the study of mouse mutants and four research groups of the EMBL. The proposed project is based on the study of cyclophilins (cyclosporin binding proteins) of the human parasites belonging to the genus Schistosoma. Molecular cloning and biochemical studies of schistosome cyclophilins are already under way in the host laboratory. An interest in cyclophilins is due to their likely role in mediating the antiparasitic effects of cyclosporin A and its derivatives. Supervision and research facilities will be provided to students who have been successful in applying to the Training and Mobility of Researchers Programme of the European Community (see the call for proposals under ...
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2KFW: The interaction of the Escherichia coli protein SlyD with nickel ions illuminates the mechanism of regulation of its peptidyl-prolyl isomerase activity.
Microbes utilize enzymes to perform a variety of functions. Enzymes are biocatalysts working as highly efficient machines at the molecular level. In the past, enzymes have been viewed as static entities and their function has been explained on the basis of direct structural interactions between the enzyme and the substrate. A variety of experimental and computational techniques, however, continue to reveal that proteins are dynamically active machines, with various parts exhibiting internal motions at a wide range of time-scales. Increasing evidence also indicates that these internal protein motions play a role in promoting protein function such as enzyme catalysis. Moreover, the thermodynamical fluctuations of the solvent, surrounding the protein, have an impact on internal protein motions and, therefore, on enzyme function. In this review, we describe recent biochemical and theoretical investigations of internal protein dynamics linked to enzyme catalysis. In the enzyme cyclophilin A, investigations
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Complete information for TRIM4 gene (Protein Coding), Tripartite Motif Containing 4, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards - The Human Gene Compendium
Brechlin, R. 2009b. A new species of the genus Cypa Walker, 1856 from the philippines (Lepidoptera: Sphingidae). Entomo-satsphingia 2(1): 8-12. reference page ...
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Answers to frequently asked questions about cyclosporine, including dosage, side effects and reasons this drug should not be used.
Restoration of blood flow after myocardial infarction (MI), surgery or fibrinolytic therapy is necessary, but can lead to cardiomyocyte dysfunction within a generalised condition commonly known as "reperfusion injury". The role of cyclophilins, heat shock proteins (HSP), and the mitochondrial chaperone complex (MCC), was studied in this pathological condition. In vitro and in vivo models were used to replicate conditions of ischaemia/reperfusion (IR) injury. H9c2 and COS-7 cell lines were employed in nitric oxide (NO) donor and transfection applications. Experimental protocols were used to determine mitochondrial membrane potential (MMP), mitochondrial morphology, protein expression, enzyme activity and cell damage in these models. No difference was observed in activity or expression in cyclophilin or expression of the MCC in any of the models. It was noted that in the in vitro model, cell death was predominantly necrotic with only a minority of cells undergoing apoptosis, and as the degree of ...
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Cyclophilin D (referred to as HsCypD) was obtained from the freshwater pearl mussel (Hyriopsis schlegelii). The full-length cDNA was 2 671 bp, encoding a protein consisting of 367 amino acids. HsCypD was determined to be a hydrophilic intracellular protein with 10 phosphorylation sites and four tetratricopeptide repeat (TPR) domains, but no signal peptide. The core sequence region YKGCIFHRIIKDFMVQGG is highly conserved in vertebrates and invertebrates. Phylogenetic tree analysis indicated that CypD from all species had a common origin, and HsCypD had the closest phylogenetic relationship with CypD from Lottia gigantea ...
Mitochondrial permeability transition pore component cyclophilin D distinguishes nigrostriatal dopaminergic death paradigms in the MPTP mouse model of Parkinsons disease Academic Article ...
As a cyclophilin, PPIB binds the immunosuppressive drug CsA to form a CsA-cyclophilin complex, which then targets calcineurin ... Mikol V, Kallen J, Walkinshaw MD (1994). "X-ray structure of a cyclophilin B/cyclosporin complex: comparison with cyclophilin A ... "Human cyclophilin B: a second cyclophilin gene encodes a peptidyl-prolyl isomerase with a signal sequence". Proc Natl Acad Sci ... As a cyclophilin, PPIB binds cyclosporin A (CsA) and can be found within in the cell or secreted by the cell. PPIB is the ...
Horowitz DS, Kobayashi R, Krainer AR (Dec 1997). "A new cyclophilin and the human homologues of yeast Prp3 and Prp4 form a ... Horowitz DS, Lee EJ, Mabon SA, Misteli T (Feb 2002). "A cyclophilin functions in pre-mRNA splicing". The EMBO Journal. 21 (3): ... a nuclear cyclophilin". The Journal of Biological Chemistry. 275 (11): 7439-42. doi:10.1074/jbc.275.11.7439. PMID 10713041. ... "Crystal structure of a complex between human spliceosomal cyclophilin H and a U4/U6 snRNP-60K peptide". Journal of Molecular ...
Ferreira PA, Nakayama TA, Pak WL, Travis GH (Oct 1996). "Cyclophilin-related protein RanBP2 acts as chaperone for red/green ... Ferreira PA, Yunfei C, Schick D, Roepman R (Sep 1998). "The cyclophilin-like domain mediates the association of Ran-binding ... Yi H, Friedman JL, Ferreira PA (Nov 2007). "The cyclophilin-like domain of Ran-binding protein-2 modulates selectively the ... Ferreira PA, Hom JT, Pak WL (Sep 1995). "Retina-specifically expressed novel subtypes of bovine cyclophilin". The Journal of ...
This gene is a member of the cyclophilin family of peptidylprolyl isomerases. The cyclophilins are a highly conserved ... 2005). "Cell surface expression of CD147/EMMPRIN is regulated by cyclophilin 60". J. Biol. Chem. 280 (30): 27866-71. doi: ... "Entrez Gene: PPIL2 peptidylprolyl isomerase (cyclophilin)-like 2". Wang BB, Hayenga KJ, Payan DG, Fisher JM (1996). " ... 2010). "Structural and biochemical characterization of the human cyclophilin family of peptidyl-prolyl isomerases". PLoS Biol. ...
This gene encodes a member of the cyclophilin family. Cyclophilins catalyze the cis-trans isomerization of peptidylprolyl imide ... Huang LL, Zhao XM, Huang CQ, Yu L, Xia ZX (Mar 2005). "Structure of recombinant human cyclophilin J, a novel member of the ... "Entrez Gene: PPIL3 peptidylprolyl isomerase (cyclophilin)-like 3". Gerdin AK (2010). "The Sanger Mouse Genetics Programme: high ... cyclophilin)-like gene (PPIL3) from human fetal brain". Cytogenetics and Cell Genetics. 92 (3-4): 231-6. doi:10.1159/000056909 ...
This gene is a member of the cyclophilin family of peptidylprolyl isomerases (PPIases). The cyclophilins are a highly conserved ... "Entrez Gene: PPIL1 peptidylprolyl isomerase (cyclophilin)-like 1". Tripodis N, Mason R, Humphray SJ, et al. (1999). "Physical ... expression and chromosomal mapping of a novel cyclophilin-related gene (PPIL1) from human fetal brain". Cytogenet Cell Genet. ...
Examples include photoisomerase and immunophilins such as cyclophilin. cis-trans-Isomerases at the US National Library of ...
This gene is a member of the cyclophilin family of peptidylprolyl isomerases. The cyclophilins are a highly conserved family, ... 2002). "Molecular cloning, structure and expression of a novel nuclear RNA-binding cyclophilin-like gene (PPIL4) from human ... cyclophilin)-like 4". Zeng L, Zhou Z, Xu J, et al. ( ...
It inhibits cyclophilin A. Alisporivir is not immunosuppressive. It is being researched for potential use in the treatment of ... Alisporivir (INN), or Debio 025, DEB025, (or UNIL-025) is a cyclophilin inhibitor. Its structure is reminiscent of, and ... April 2008). "Inhibition of human immunodeficiency virus type 1 replication in human cells by Debio-025, a novel cyclophilin ... December 2008). "Debio 025, a cyclophilin binding molecule, is highly efficient in clearing HCV replicon containing cells, ...
... cyclophilin A)". Haendler B, Hofer E (Jul 1990). "Characterization of the human cyclophilin gene and of related processed ... Like other cyclophilins, PPIA forms a β-barrel structure with a hydrophobic core. This β-barrel is composed of eight anti- ... Yao Q, Li M, Yang H, Chai H, Fisher W, Chen C (Mar 2005). "Roles of cyclophilins in cancers and other organ systems". World ... Peptidylprolyl isomerase A (PPIA), also known as cyclophilin A (CypA) or rotamase A is an enzyme that in humans is encoded by ...
As a cyclophilin, PPIC binds the immunosuppressive drug CsA to form a CsA-cyclophilin complex, which then targets calcineurin ... Depletion of these two cyclophilins lead to hyperoxidation of the ER. In the brain, PPIC complexes with cyclophilin C- ... Like other cyclophilins, PPIC forms a β-barrel structure with a hydrophobic core. This β-barrel is composed of eight anti- ... Yao Q, Li M, Yang H, Chai H, Fisher W, Chen C (Mar 2005). "Roles of cyclophilins in cancers and other organ systems". World ...
As a cyclophilin, PPIF binds the immunosuppressive drug CsA to form a CsA-cyclophilin complex, which then targets calcineurin ... Thus, cyclophilins may function in cardioprotection during ischemia-reperfusion injury. Currently, cyclophilin expression is ... Like other cyclophilins, PPIF forms a β-barrel structure with a hydrophobic core. This β-barrel is composed of eight anti- ... It has also been referred to as, but should not be confused with, cyclophilin D (CypD), which is encoded by the PPID gene. As a ...
As a cyclophilin, PPID binds the immunosuppressive drug CsA to form a CsA-cyclophilin complex, which then targets calcineurin ... Thus, cyclophilins may function in cardioprotection during ischemia-reperfusion injury. Currently, cyclophilin expression is ... Peptidylprolyl isomerase D (cyclophilin D), also known as PPID, is an enzyme which in humans is encoded by the PPID gene on ... Like other cyclophilins, PPID forms a β-barrel structure with a hydrophobic core. This β-barrel is composed of eight anti- ...
As a cyclophilin, PPIE also binds the immunosuppressive drug CsA to form a CsA-cyclophilin complex, which then targets ... Thus, cyclophilins may function in cardioprotection during ischemia-reperfusion injury. Currently, cyclophilin expression is ... Peptidylprolyl isomerase E (cyclophilin E), also known as PPIE, is an enzyme which in humans is encoded by the PPIE gene on ... Wang Z, Liu X, Zhao Z, Xu C, Zhang K, Chen C, Sun L, Gao GF, Ye X, Liu W (2011). "Cyclophilin E functions as a negative ...
Nestel FP, Colwill K, Harper S, Pawson T, Anderson SK (1997). "RS cyclophilins: identification of an NK-TR1-related cyclophilin ...
... which binds cyclophilin. Both the FKBP-tacrolimus complex and the cyclosporin-cyclophilin complex inhibit a phosphatase called ... Along with cyclophilin, FKBPs belong to the immunophilin family. FKBP12 is notable in humans for binding the immunosuppressant ... FKBP, or FK506 binding protein, is a family of proteins that have prolyl isomerase activity and are related to the cyclophilins ... Liu J, Farmer JD, Lane WS, Friedman J, Weissman I, Schreiber SL (August 1991). "Calcineurin is a common target of cyclophilin- ...
"RS cyclophilins: identification of an NK-TR1-related cyclophilin". Gene. 180 (1-2): 151-5. doi:10.1016/S0378-1119(96)00436-2. ... Lin CL, Leu S, Lu MC, Ouyang P (2004). "Over-expression of SR-cyclophilin, an interaction partner of nuclear pinin, releases SR ... "Entrez Gene: PPIG peptidylprolyl isomerase G (cyclophilin G)". Lin, Chun Lun; Leu Steve; Lu Ming Chu; Ouyang Pin (Aug 2004). " ... 2004). "The human nuclear SRcyp is a cell cycle-regulated cyclophilin". J. Biol. Chem. 279 (21): 22322-30. doi:10.1074/jbc. ...
When bound to cyclophilin B, cyclosporin A binds and inactivates the key signaling intermediate calcineurin. The protein ... Bram RJ, Crabtree GR (1994). "Calcium signalling in T cells stimulated by a cyclophilin B-binding protein". Nature. 371 (6495 ... Tovey SC, Bootman MD, Lipp P, Berridge MJ, Bram RJ (2000). "Calcium-modulating cyclophilin ligand desensitizes hormone-evoked ... Guo S, Lopez-Ilasaca M, Dzau VJ (2005). "Identification of calcium-modulating cyclophilin ligand (CAML) as transducer of ...
The Role of Cyclophilin D in learning and memory. Brush, F. Robert. (2003). Selection for Differences in avoidance Learning: ...
... is a type I integral membrane receptor that has many ligands, including the cyclophilin (CyP) proteins Cyp-A and CyP-B ... Yurchenko V, O'Connor M, Dai W, Guo H, Toole B, Sherry B, Bukrinsky M (2001). "CD147 is a signaling receptor for cyclophilin B ... 2002). "Active site residues of cyclophilin A are crucial for its signaling activity via CD147". J. Biol. Chem. 277 (25): 22959 ... 2001). "CD147 is a signaling receptor for cyclophilin B". Biochem. Biophys. Res. Commun. 288 (4): 786-8. doi:10.1006/bbrc. ...
The resulting ciclosporin/cyclophilin complex inhibits the phosphatase activity of calcineurin which in turn is required for ... It does this by forming a complex with cyclophilin to block the phosphatase activity of calcineurin that in turn decreases the ... It does this by binding to cyclophilin, a multifunctional protein that facilitates protein folding, acts as a protein chaperone ... Ciclosporin prevents the dephosphorylation of NF-AT by binding to cyclophilin. It also inhibits lymphokine production and ...
Ferreira PA, Nakayama TA, Pak WL, Travis GH (1996). "Cyclophilin-related protein RanBP2 acts as chaperone for red/green opsin ...
Yang WM, Inouye CJ, Seto E (Jun 1995). "Cyclophilin A and FKBP12 interact with YY1 and alter its transcriptional activity". The ... a peptidylprolyl cis-trans isomerase distinct from cyclophilin". Proceedings of the National Academy of Sciences of the United ...
Yang WM, Inouye CJ, Seto E (Jun 1995). "Cyclophilin A and FKBP12 interact with YY1 and alter its transcriptional activity". The ...
2009). "Developmental Shift of Cyclophilin D Contribution to Hypoxic-Ischemic Brain Injury". Journal of Neuroscience. 29 (8): ...
However, Cyclophilin A is important for the inhibition of HIV-1 by TRIM5α in Old World monkey species. The "specificity" of ... Berthoux L, Sebastian S, Sokolskaja E, Luban J (2005). "Cyclophilin A is required for TRIM5α-mediated resistance to HIV-1 in ... Sayah DM, Sokolskaja E, Berthoux L, Luban J (2004). "Cyclophilin A retrotransposition into TRIM5 explains owl monkey resistance ...
Although there are 17 cyclophilins in the human genome, the function of most cyclophilin isoforms is unknown. At least some ... Using biochemical, structural, and computational methods we characterize the human cyclophilin family in detail and suggest ... Author Summary Cyclophilins are proteins that catalyze the isomerization of prolines, interconverting this structurally ...
Cyclophilin B) (PPIB) Peptide. Species: Human. Source: Escherichia coli (E. coli). Order product ABIN934947. ... Peptidylprolyl Isomerase B (Cyclophilin B) (PPIB) (AA 26-216) Peptide Peptidylprolyl Isomerase B (Cyclophilin B) (PPIB) (AA 26- ... Cyclophilin B protein has been used in SDS PAGE and may be suitable for use in other assays to be determined by the end user. ... Peptidylprolyl Isomerase B (Cyclophilin B) (PPIB) show synonyms for this antigen * cypb ...
Characterization of the redox state of human cyclophilin-D and its interactions with peroxiredoxin 5. Prom. : Knoops, Bernard. ... eng] Cyclophilin-D (CyP-D) is a peptidyl prolyl cis/trans isomerase located in the mitochondrial matrix of mammalian cells. The ... Characterization of the redox state of human cyclophilin-D and its interactions with peroxiredoxin 5 Primary tabs. *Détail( ... Home» Characterization of the redox state of human cyclophilin-D and its interactions with peroxiredoxin 5 ...
Votteler J, Wray V, Schubert U: Role of cyclophilin A in HIV replication. Future Virol 2007, 2: 65-78. 10.2217/17460794.2.1.65 ... Ardon O, Zimmermann ES, Andersen JL, DeHart JL, Blackett J, Planelles V: Induction of G 2 Arrest and Binding to Cyclophilin A ... The intriguing Cyclophilin A-HIV-1 Vpr interaction: prolyl cis/trans isomerisation catalysis and specific binding. ... Franke EK, Yuan HEH, Luban J: Specific incorporation of cyclophilin A into HIV-1 virions. Nature 1994, 372: 359-362. 10.1038/ ...
It has been shown, however, that AIF interacts with cyclophilin A to degrade DNA, and the peptidyl prolyl cis-trans isomerase ... D denotes cyclophilin D. B, Bax-VDAC model. In healthy cells (left), VDAC functions as a component of the nucleotide exchange ... AIF and cyclophilin A cooperate in apoptosis-associated chromatinolysis. Oncogene. 2004; 23: 1514-1521. ... located in the inner mitochondrial membrane and cyclophilin D, a peptidyl prolyl cis-trans isomerase that interacts with ANT. ...
The cyclophilin inhibitors on the market or in development are non-selective between the four common cyclophilin isoforms A, B ... several cyclophilin inhibitors are in clinical development for the treatment of viral infections as the host cell cyclophilin A ... Cyclophilin D has been recognized as an excellent molecular target for several years [1] but until recently, achieving sub-type ... A role for cyclophilin D in modulating MPTP in models of Alzheimers disease was indicated when the learning deficiency of ...
Cyclophilin (CYP37) represents the homologous component of the AtCYP38. The first complex immunophilin protein identified from ... AS10 1607 , Anti-CYP38 , cyclophilin 38, peptidyl-prolyl cis-trans isomerase, smaller pack size. AS10 1618 , Anti-CYP38 , ... Synthetic peptide (amino acids 277 - 290) specific for chloroplast cyclophilin from Arabidopsis thaliana (At3g15520) (P82869). ...
... transmembrane activator and calcium mineral modulator and cyclophilin ligand interactor (TACI) and B\cell maturation antigen ( ...
Rotamase The first cyclophilin (Cyp/PPIases: EC 5.2.1.8) was isolated more than three decades ago as an... ... Cyclophilin-like domain (CLD); Immunophilin; Peptidyl prolyl cis trans isomerase; PPIase; ... The single domain cyclophilin has a single cyclophilin-like domain (CLD), whereas multidomain cyclophilins also possess ... Cyclophilin D interacts with Bcl2 and exerts an anti-apoptotic effect. J Biol Chem. 2009;284:9692-9.CrossRefPubMedPubMedCentral ...
Other cyclophilins have similar structures to cyclophilin A. The cyclosporin-cyclophilin A complex inhibits a calcium/ ... Cyclophilin A is a cytosolic and highly abundant protein. The protein belongs to a family of isozymes, including cyclophilins B ... J&J targets degenerative diseases in cyclophilin inhibitor partnership. Dan Stanton. 08-Dec-2015 Cyclophilins at the US ... Cyclophilin D, which is located in the matrix of mitochondria, is only a modulatory, but may or may not be a structural ...
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE F, MITOCHONDRIAL1-(4-Aminobenzyl)-3-(2-{(2r)-2-[2-(Methylsulfanyl)phenyl]pyrrolidin-1-Yl}-2-Oxoethyl)urea
Rabbit polyclonal Cyclophilin B antibody. Validated in WB, IP, IHC, ICC/IF and tested in Mouse, Rat, Horse, Chicken, Dog, Human ... Human Cyclophilin B peptide (ab16277) at 1 µg/ml. Lane 7 : HeLa whole cell lysate with Human Cyclophilin B peptide (ab16277) at ... Human Cyclophilin B peptide (ab16277) at 1 µg/ml. Lane 9 : Jurkat whole cell lysate with Human Cyclophilin B peptide (ab16277) ... Anti-Cyclophilin B antibody (ab16045) at 0.5 µg/ml + Recombinant Human Cyclophilin B protein (ab88801) at 0.01 µg. Secondary. ...
Rabbit polyclonal Cyclophilin A antibody validated for WB, IHC, ICC/IF and tested in Human, Mouse and Rat. Referenced in 21 ... Belongs to the cyclophilin-type PPIase family. PPIase A subfamily.. Contains 1 PPIase cyclophilin-type domain. ... All lanes : Anti-Cyclophilin A antibody (ab41684) at 1 µg/ml. Lane 1 : HeLa (Human epithelial carcinoma cell line) Whole Cell ... Synthetic peptide conjugated to KLH derived from within residues 100 to the C-terminus of Human Cyclophilin A. Read Abcams ...
There are no specific protocols for Recombinant human Cyclophilin F protein (ab79186). Please download our general protocols ...
Cyclophilin-A Human Recombinant, Cyclophilin-B Human Recombinant, Cyclophilin-D Human Recombinant ... Humans are thought to have around 16 of these cyclophilins.. Cyclophilin Function. The Cyclosporin Cyclophilin A complex ... About Cyclophilin:. Cyclophilins are known for their ability to bind ciclosporin, which is used to suppress rejection after a ... Cyclophilin Structure. Cyclophilin A has a beta barrel structure (two alpha helices and a beta sheet). There is usually a ...
... mostly Cyclophilin A (CyPA), in the replication of HCV is supported by a growing body of in vitro and in vivo evidence. CyPA ...
Browse our Cyclophilin C Antibody catalog backed by our Guarantee+. ... Our Cyclophilin C Antibodies can be used in a variety of model species: Human. Use the list below to choose the Cyclophilin C ... Alternate Names for Cyclophilin C Antibodies. anti-Cyclophilin C antibody, anti-PPIC antibody, anti-CYPCMGC3673 antibody, anti- ... Cyclophilin C Antibodies. We offer Cyclophilin C Antibodies for use in common research applications: ELISA, ...
... cyclophilin a include A Restriction Enzyme Based Cloning Method to Assess the In vitro Replication Capacity of HIV-1 Subtype ... Cyclophilin A: A 17-KDa cytoplasmic Peptidylprolyl isomerase involved in immunoregulation. It is a member of the cyclophilin ...
Generation of Rabbit Anti-Cyclophilin and Anti-AGE-Modified Cyclophilin Antisera.. Female New Zealand white rabbits were ... cyclophilin A;. CsA,. cyclosporin A;. PIC,. pre-integration complex;. CA,. capsid antigen;. AGE,. advanced glycosylation ... and 100 nmol of 125I-cyclophilin (either alone, or in combination with a 100-fold excess of cold cyclophilin) was added. After ... A receptor for another member of the cyclophilin family, cyclophilin B (CyPB), which is highly homologous to CyPA, has been ...
The Cyclophilin A-CD147 complex promotes the proliferation and homing of multiple myeloma cells.. Zhu D1, Wang Z2, Zhao JJ1, ... The Cyclophilin A-CD147 complex promotes bone marrow colonization of B-cell malignancies: implications for therapy ... The Cyclophilin A-CD147 complex promotes bone marrow colonization of B-cell malignancies: implications for therapy ... The Cyclophilin A-CD147 complex promotes bone marrow colonization of B-cell malignancies: implications for therapy ...
Validated positive control siRNA targeting the Cyclophilin B (PPIB) housekeeping gene in human, mouse, or rat Accell siRNA ... Accell Cyclophilin B Control siRNA Accell Cyclophilin B Control siRNA. Validated Accell positive controls provide a reliable ... Accell Cyclophilin B Control siRNA is modified with patent-pending Accell modification pattern to enable uptake by difficult-to ... Accell Cyclophilin B Control siRNA is validated, highly reliable positive control for delivery and RNAi efficiency. ...
Cyclophilin A (CypA) is the main member of the immunophilin superfamily that has peptidyl-prolyl cis-trans isomerase activity. ... Keywords: influenza virus; Cyclophilin A; Cyclosporin A; virus-host interaction influenza virus; Cyclophilin A; Cyclosporin A; ... This article belongs to the Special Issue Cyclophilins and Viruses) View Full-Text , Download PDF [274 KB, uploaded 12 May 2015 ... Cyclophilin A (CypA) is the main member of the immunophilin superfamily that has peptidyl-prolyl cis-trans isomerase activity. ...
This review focuses on the role of cyclophilin D (CypD) as a prominent mediator of the mitochondrial permeability transition ...
... is a fluorescent control reagent that provides highly reliable qualitative assessment ... SH-SY5Y cells were treated with 1 µM Accell Red Cyclophilin B Control siRNA in Accell delivery media. (Red fluorescence = ... In addition, it acts as a positive control targeting Cyclophilin B. Also known as peptidylprolyl isomerase B (PPIB), ... Accell Green Cyclophilin B Control siRNA. siRNA for difficult-to-transfect cells ...
A Cyclophilin Function in Hsp90-Dependent Signal Transduction. By Andrea A. Duina, Hui-Chen Jane Chang, James A. Marsh, Susan ... A Cyclophilin Function in Hsp90-Dependent Signal Transduction. By Andrea A. Duina, Hui-Chen Jane Chang, James A. Marsh, Susan ... A Cyclophilin Function in Hsp90-Dependent Signal Transduction Message Subject. (Your Name) has forwarded a page to you from ... Cpr6 and Cpr7, the Saccharomyces cerevisiae homologs of cyclophilin-40 (CyP-40), were shown to form complexes with Hsp90, a ...
  • Cyclophilin A (CypA) represents a potential target for antiretroviral therapy since inhibition of CypA suppresses human immunodeficiency virus type 1 (HIV-1) replication, although the mechanism through which CypA modulates HIV-1 infectivity still remains unclear. (biomedcentral.com)
  • The Cyclophilin A-CD147 complex promotes the proliferation and homing of multiple myeloma cells. (nih.gov)
  • In the respect that cyclophilin is regarded as a housekeeping gene, the reduction in its mRNA suggests that ECS may have more persistent and widespread effects on brain gene expression than previously suspected. (ox.ac.uk)
  • PPIA / Cyclophilin A is secreted by vascular smooth muscle cells in response to inflammatory stimuli, and could thus contribute to atherosclerosis. (sinobiological.com)
  • Ray, Rialon-Guevara, Veras, Sullenger, White: Comparing human pancreatic cell secretomes by in vitro aptamer selection identifies cyclophilin B as a candidate pancreatic cancer biomarker. (antibodies-online.com)
  • Cyclophilins are involved in a myriad of physiological cellular processes, such as protein trafficking and maturation, receptor complex stabilization, apoptosis, receptor. (springer.com)
  • Moreover, we evidenced cyclophilin A-cytochrome c complexes within the cytoplasm of HCT116 cells following staurosporine-induced apoptosis. (docsford.com)
  • We also measured the expression of cyclophilin mRNA, and found it to be reduced in all hippocampal subfields, and in the parietal cortex, after a single ECS. (ox.ac.uk)
  • 1999). Itoh K: A cyclophilin B gene encodes antigenic epitopes recognized by HLA-A24-restricted and tumorspecific CTLs. (core.ac.uk)
  • Contrasting effects of electroconvulsive shock on mRNAs encoding the high affinity kainate receptor subunits (KA1 and KA2) and cyclophilin in the rat. (ox.ac.uk)
  • Allain F, Vanpouille C, Carpentier M, Slomianny MC, Durieux S, Spik G. Interaction with glycosaminoglycans is required for cyclophilin B to trigger integrin-mediated adhesion of peripheral blood T lymphocytes to extracellular matrix. (springer.com)
  • Interaction with glycosaminoglycans is required for cyclophilin B to trigger integrin-mediated adhesion of peripheral blood T lymphocytes to extracellular matrix. (semanticscholar.org)
  • Here we report two new interaction sites between cyclophilins and p24. (uzh.ch)