Acrosin: A trypsin-like enzyme of spermatozoa which is not inhibited by alpha 1 antitrypsin.Spermatozoa: Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.Serine Endopeptidases: Any member of the group of ENDOPEPTIDASES containing at the active site a serine residue involved in catalysis.Enzyme Precursors: Physiologically inactive substances that can be converted to active enzymes.Acrosome Reaction: Changes that occur to liberate the enzymes of the ACROSOME of a sperm (SPERMATOZOA). Acrosome reaction allows the sperm to penetrate the ZONA PELLUCIDA and enter the OVUM during FERTILIZATION.Acrosome: The cap-like structure covering the anterior portion of SPERM HEAD. Acrosome, derived from LYSOSOMES, is a membrane-bound organelle that contains the required hydrolytic and proteolytic enzymes necessary for sperm penetration of the egg in FERTILIZATION.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.Zona Pellucida: A tough transparent membrane surrounding the OVUM. It is penetrated by the sperm during FERTILIZATION.Sperm Capacitation: The structural and functional changes by which SPERMATOZOA become capable of oocyte FERTILIZATION. It normally requires exposing the sperm to the female genital tract for a period of time to bring about increased SPERM MOTILITY and the ACROSOME REACTION before fertilization in the FALLOPIAN TUBES can take place.Hominidae: Family of the suborder HAPLORHINI (Anthropoidea) comprising bipedal primate MAMMALS. It includes modern man (HOMO SAPIENS) and the great apes: gorillas (GORILLA GORILLA), chimpanzees (PAN PANISCUS and PAN TROGLODYTES), and orangutans (PONGO PYGMAEUS).Acrosin: A trypsin-like enzyme of spermatozoa which is not inhibited by alpha 1 antitrypsin.Spermatozoa: Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.alpha-L-Fucosidase: An enzyme that catalyzes the hydrolysis of an alpha L-fucoside to yield an alcohol and L-fucose. Deficiency of this enzyme can cause FUCOSIDOSIS. EC 3.2.1.51.Microtubule Proteins: Proteins found in the microtubules.Sperm Maturation: The maturing process of SPERMATOZOA after leaving the testicular SEMINIFEROUS TUBULES. Maturation in SPERM MOTILITY and FERTILITY takes place in the EPIDIDYMIS as the sperm migrate from caput epididymis to cauda epididymis.Epididymis: The convoluted cordlike structure attached to the posterior of the TESTIS. Epididymis consists of the head (caput), the body (corpus), and the tail (cauda). A network of ducts leaving the testis joins into a common epididymal tubule proper which provides the transport, storage, and maturation of SPERMATOZOA.Factor VIII: Blood-coagulation factor VIII. Antihemophilic factor that is part of the factor VIII/von Willebrand factor complex. Factor VIII is produced in the liver and acts in the intrinsic pathway of blood coagulation. It serves as a cofactor in factor X activation and this action is markedly enhanced by small amounts of thrombin.Hemophilia A: The classic hemophilia resulting from a deficiency of factor VIII. It is an inherited disorder of blood coagulation characterized by a permanent tendency to hemorrhage.Antibodies: Immunoglobulin molecules having a specific amino acid sequence by virtue of which they interact only with the ANTIGEN (or a very similar shape) that induced their synthesis in cells of the lymphoid series (especially PLASMA CELLS).Antibody Specificity: The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site.Acrosin: A trypsin-like enzyme of spermatozoa which is not inhibited by alpha 1 antitrypsin.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.Immune Sera: Serum that contains antibodies. It is obtained from an animal that has been immunized either by ANTIGEN injection or infection with microorganisms containing the antigen.Goats: Any of numerous agile, hollow-horned RUMINANTS of the genus Capra, in the family Bovidae, closely related to the SHEEP.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.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.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.B-Cell Activation Factor Receptor: A member of the tumor necrosis factor receptor superfamily that specifically binds B-CELL ACTIVATING FACTOR. It is found on B-LYMPHOCYTES and plays a role in maturation and survival of B-cells. Signaling by the activated receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.Patient Access to Records: The freedom of patients to review their own medical, genetic, or other health-related records.Sperm Motility: Movement characteristics of SPERMATOZOA in a fresh specimen. It is measured as the percentage of sperms that are moving, and as the percentage of sperms with productive flagellar motion such as rapid, linear, and forward progression.Two-Dimensional Difference Gel Electrophoresis: Methods of comparing two or more samples on the same two-dimensional gel electrophoresis gel.Triose-Phosphate Isomerase: An enzyme that catalyzes reversibly the conversion of D-glyceraldehyde 3-phosphate to dihydroxyacetone phosphate. A deficiency in humans causes nonspherocytic hemolytic disease (ANEMIA, HEMOLYTIC, CONGENITAL NONSPHEROCYTIC). EC 5.3.1.1.Electrophoresis, Gel, Two-Dimensional: Electrophoresis in which a second perpendicular electrophoretic transport is performed on the separate components resulting from the first electrophoresis. This technique is usually performed on polyacrylamide gels.Cryopreservation: Preservation of cells, tissues, organs, or embryos by freezing. In histological preparations, cryopreservation or cryofixation is used to maintain the existing form, structure, and chemical composition of all the constituent elements of the specimens.Proteomics: The systematic study of the complete complement of proteins (PROTEOME) of organisms.Semen Preservation: The process by which semen is kept viable outside of the organism from which it was derived (i.e., kept from decay by means of a chemical agent, cooling, or a fluid substitute that mimics the natural state within the organism).Proteome: The protein complement of an organism coded for by its genome.Acrosin: A trypsin-like enzyme of spermatozoa which is not inhibited by alpha 1 antitrypsin.Cryoprotective Agents: Substances that provide protection against the harmful effects of freezing temperatures.Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization: A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.Periodic Acid-Schiff Reaction: A histochemical technique for staining carbohydrates. It is based on PERIODIC ACID oxidation of a substance containing adjacent hydroxyl groups. The resulting aldehydes react with Schiff reagent to form a colored product.Acrosin: A trypsin-like enzyme of spermatozoa which is not inhibited by alpha 1 antitrypsin.Acrosome: The cap-like structure covering the anterior portion of SPERM HEAD. Acrosome, derived from LYSOSOMES, is a membrane-bound organelle that contains the required hydrolytic and proteolytic enzymes necessary for sperm penetration of the egg in FERTILIZATION.Spermatozoa: Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.Sperm Head: The anterior portion of the spermatozoon (SPERMATOZOA) that contains mainly the nucleus with highly compact CHROMATIN material.Teratogens: An agent that causes the production of physical defects in the developing embryo.Abnormalities, Drug-Induced: Congenital abnormalities caused by medicinal substances or drugs of abuse given to or taken by the mother, or to which she is inadvertently exposed during the manufacture of such substances. The concept excludes abnormalities resulting from exposure to non-medicinal chemicals in the environment.Acrosome Reaction: Changes that occur to liberate the enzymes of the ACROSOME of a sperm (SPERMATOZOA). Acrosome reaction allows the sperm to penetrate the ZONA PELLUCIDA and enter the OVUM during FERTILIZATION.Peanut Agglutinin: Lectin purified from peanuts (ARACHIS HYPOGAEA). It binds to poorly differentiated cells and terminally differentiated cells and is used in cell separation techniques.Infertility, Male: The inability of the male to effect FERTILIZATION of an OVUM after a specified period of unprotected intercourse. Male sterility is permanent infertility.Counterfeit Drugs: Drugs manufactured and sold with the intent to misrepresent its origin, authenticity, chemical composition, and or efficacy. Counterfeit drugs may contain inappropriate quantities of ingredients not listed on the label or package. In order to further deceive the consumer, the packaging, container, or labeling, may be inaccurate, incorrect, or fake.Fraud: Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.Reagent Kits, Diagnostic: Commercially prepared reagent sets, with accessory devices, containing all of the major components and literature necessary to perform one or more designated diagnostic tests or procedures. They may be for laboratory or personal use.China: A country spanning from central Asia to the Pacific Ocean.CambodiaProto-Oncogene Proteins c-kit: A protein-tyrosine kinase receptor that is specific for STEM CELL FACTOR. This interaction is crucial for the development of hematopoietic, gonadal, and pigment stem cells. Genetic mutations that disrupt the expression of PROTO-ONCOGENE PROTEINS C-KIT are associated with PIEBALDISM, while overexpression or constitutive activation of the c-kit protein-tyrosine kinase is associated with tumorigenesis.Medicare Assignment: Concept referring to the standardized fees for services rendered by health care providers, e.g., laboratories and physicians, and reimbursement for those services under Medicare Part B. It includes acceptance by the physician.Quality Control: A system for verifying and maintaining a desired level of quality in a product or process by careful planning, use of proper equipment, continued inspection, and corrective action as required. (Random House Unabridged Dictionary, 2d ed)Quality of Life: A generic concept reflecting concern with the modification and enhancement of life attributes, e.g., physical, political, moral and social environment; the overall condition of a human life.Drug Industry: That segment of commercial enterprise devoted to the design, development, and manufacture of chemical products for use in the diagnosis and treatment of disease, disability, or other dysfunction, or to improve function.Acrosome: The cap-like structure covering the anterior portion of SPERM HEAD. Acrosome, derived from LYSOSOMES, is a membrane-bound organelle that contains the required hydrolytic and proteolytic enzymes necessary for sperm penetration of the egg in FERTILIZATION.Spermatozoa: Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.Sperm-Ovum Interactions: Interactive processes between the oocyte (OVUM) and the sperm (SPERMATOZOA) including sperm adhesion, ACROSOME REACTION, sperm penetration of the ZONA PELLUCIDA, and events leading to FERTILIZATION.Antibodies: Immunoglobulin molecules having a specific amino acid sequence by virtue of which they interact only with the ANTIGEN (or a very similar shape) that induced their synthesis in cells of the lymphoid series (especially PLASMA CELLS).Antigens: Substances that are recognized by the immune system and induce an immune reaction.CitrullineAntibodies, Monoclonal: Antibodies produced by a single clone of cells.Antibody Specificity: The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site.Peptides, Cyclic: Peptides whose amino and carboxy ends are linked together with a peptide bond forming a circular chain. Some of them are ANTI-INFECTIVE AGENTS. Some of them are biosynthesized non-ribosomally (PEPTIDE BIOSYNTHESIS, NON-RIBOSOMAL).Autoantibodies: Antibodies that react with self-antigens (AUTOANTIGENS) of the organism that produced them.Serpins: A family of serine proteinase inhibitors which are similar in amino acid sequence and mechanism of inhibition, but differ in their specificity toward proteolytic enzymes. This family includes alpha 1-antitrypsin, angiotensinogen, ovalbumin, antiplasmin, alpha 1-antichymotrypsin, thyroxine-binding protein, complement 1 inactivators, antithrombin III, heparin cofactor II, plasminogen inactivators, gene Y protein, placental plasminogen activator inhibitor, and barley Z protein. Some members of the serpin family may be substrates rather than inhibitors of SERINE ENDOPEPTIDASES, and some serpins occur in plants where their function is not known.Search Engine: Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.alpha 1-Antitrypsin: Plasma glycoprotein member of the serpin superfamily which inhibits TRYPSIN; NEUTROPHIL ELASTASE; and other PROTEOLYTIC ENZYMES.Databases, Genetic: Databases devoted to knowledge about specific genes and gene products.Serine Proteinase Inhibitors: Exogenous or endogenous compounds which inhibit SERINE ENDOPEPTIDASES.Genome, Human: The complete genetic complement contained in the DNA of a set of CHROMOSOMES in a HUMAN. The length of the human genome is about 3 billion base pairs.Antibodies: Immunoglobulin molecules having a specific amino acid sequence by virtue of which they interact only with the ANTIGEN (or a very similar shape) that induced their synthesis in cells of the lymphoid series (especially PLASMA CELLS).Internet: A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.Genes: A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms.Genomics: The systematic study of the complete DNA sequences (GENOME) of organisms.
(1/189) Changes in hyaluronidase, acrosin, and N-acetylhexosaminidase activities of dog sperm after incubation.

Hyaluronidase, acrosin and N-acetylhexosaminidase activities were examined in sperm collected from 12 beagle dogs and in culture medium after 0.5 hr and 7 hr of sperm incubation. The activities of the three enzymes were significantly higher at 7 hr than at 0.5 hr (P < 0.05, 0.01), and the increases were associated with sperm capacitation. It was considered that the three enzymes in the dog sperm are related to fertilization by reason of the findings of the release of these enzymes from the sperm into the medium after 7 hr of incubation.  (+info)

(2/189) Immunolocalization of CRES (Cystatin-related epididymal spermatogenic) protein in the acrosomes of mouse spermatozoa.

The CRES (cystatin-related epididymal spermatogenic) protein is a member of the cystatin superfamily of cysteine protease inhibitors and exhibits highly restricted expression in the reproductive tract. We have previously shown that CRES protein is present in elongating spermatids in the testis and is synthesized and secreted by the proximal caput epididymal epithelium. The presence of CRES protein in developing germ cells and in the luminal fluid surrounding maturing spermatozoa prompted us to examine whether CRES protein is associated with spermatozoa. In the studies presented, indirect immunofluorescence, immunogold electron microscopy, and Western blot analysis demonstrated that CRES protein is localized in sperm acrosomes and is released during the acrosome reaction. Interestingly, while the 19- and 14-kDa CRES proteins were present in testicular and proximal caput epididymal spermatozoa, the 14-kDa CRES protein was the predominant form present in mid-caput to cauda epididymal spermatozoa. Furthermore, following the ionophore-induced acrosome reaction, CRES protein localization was similar to that of proacrosin/acrosin in that it was detected in the soluble fraction as well as associated with the acrosome-reacted spermatozoa. The presence of CRES protein in the sperm acrosome, a site of high hydrolytic and proteolytic activity, suggests that CRES may play a role in the regulation of intraacrosomal protein processing or may be involved in fertilization.  (+info)

(3/189) Effect of recombinant boar beta-acrosin on sperm binding to intact zona pellucida during in vitro fertilization.

In a previous paper we demonstrated that boar beta-acrosin recombinant proteins were able to bind non-enzymatically to solubilized pig zona pellucida (ZP) glycoproteins. Here we report the participation of boar beta-acrosin in the secondary binding of sperm to intact pig ZP. This was achieved by using two boar recombinant proteins: beta-acrosin and a mutant of the catalytic site, beta-acrosin Ser/Ala(222). Assays of binding between the iodinated recombinant beta-acrosin and whole ZP showed that this binding could be saturated, was specific, and was stable over time. Using autoradiography, we determined that recombinant beta-acrosin bound on the entire surface of the ZP but initially was distributed heterogeneously. This suggests that the ligands for beta-acrosin may not be homogeneously distributed on the ZP. To study the contribution of acrosin in sperm secondary binding to the ZP, we preincubated in vitro-matured oocytes with these recombinant proteins and then performed in vitro fertilization assays. Under the experimental conditions used, binding of beta-acrosin recombinant proteins did not block sperm penetration. These results suggest that there may be other proteins that participate in the secondary binding, and that these proteins may recognize ligands that are different from those blocked by beta-acrosin recombinant proteins.  (+info)

(4/189) Tissue-inherent fate of GPI revealed by GPI-anchored GFP transgenesis.

To clarify the fate of glycosylphosphatidylinositol (GPI) in mammals, we developed GPI-anchored enhanced green fluorescent protein (EGFP-GPI) and transgenic mice carrying this fusion construct. When it was introduced to culture cells, the EGFP-GPI protein was correctly sorted to plasma membranes and microsomes depending on GPI biosynthesis. Transgenic mice carrying EGFP-GPI were found to show a broad transgene expression. Histologically, a prominent polarized localization of EGFP-GPI protein was observed in various epithelia, the nervous system and liver and secreted from some exocrine glands, as well as non-polarized presence in non-epithelial tissues, demonstrating a tissue-inherent manner of GPI sorting.  (+info)

(5/189) Expression of human proacrosin in Escherichia coli and binding to zona pellucida.

Proacrosin is a multifunctional protein present in the sperm acrosome. This study characterizes the expression of human proacrosin in bacteria and assesses zona pellucida binding activity. The cDNA encoding human proacrosin was subcloned in pGEX-3X and pET-22b vectors. In the pGEX system, expression of the full-length fusion protein was not detected. In the pET system, an expression product with an apparent molecular size similar to that expected for the proenzyme (Rec-40, 42-44 kDa) was recognized by a monoclonal antibody to human acrosin, AcrC5F10. A 32-34-kDa protein (Rec-30), not recognized by AcrC5F10 on Western blots, was the major expression product. Proteins of 21 (Rec-20) and 18 (Rec-10) kDa were recovered as insoluble expression products as were Rec-40 and Rec-30, and truncated products from the C terminus were detected in the soluble fraction. Rec-40 and Rec-30 coexisted at any culture time tested. Immune serum raised against Rec-30 (AntiRec-30) stained the acrosomal region of permeabilized human spermatozoa and recognized the recombinant proteins and proacrosin from human sperm extracts. Amino acid sequence analysis indicated that Rec-30, Rec-20, and Rec-10 are N-terminal fragments of proacrosin. The recombinant proteins Rec-40, -30, -20, and -10 were found to interact with homologous (125)I-zona pellucida glycoproteins.  (+info)

(6/189) The Golgi apparatus segregates from the lysosomal/acrosomal vesicle during rhesus spermiogenesis: structural alterations.

The acrosome is an acidic secretory vesicle containing hydrolytic enzymes that are involved in the sperm's passage across the zona pellucida. Imaging of the acrosomal vesicle and the Golgi apparatus in live rhesus monkey spermatids was accomplished by using the vital fluorescent probe LysoTracker DND-26. Concurrently, the dynamics of living spermatid mitochondria was visualized using the specific probe MitoTracker CMTRos and LysoTracker DND-26 detected the acrosomal vesicle from its formation through spermatid differentiation. LysoTracker DND-26 also labeled the Golgi apparatus in spermatogenic cells. In spermatocytes the Golgi is spherical and, in round spermatids, it is localized over the acrosomal vesicle, as confirmed by using polyclonal antibodies against Golgin-95/GM130, Golgin-97, and Golgin-160. Using both live LysoTracker DND-26 imaging and Golgi antibodies, we found that the Golgi apparatus is cast off from the acrosomal vesicle and migrates toward the sperm tail in elongated spermatids. The Golgi is discarded in the cytoplasmic droplet and is undetectable in mature ejaculated spermatozoa. The combined utilization of three vital fluorescent probes (Hoechst 33342, LysoTracker DND-26, and MitoTracker CMTRos) permits the dynamic imaging of four organelles during primate spermiogenesis: the nucleus, the mitochondria, the acrosomal vesicle, and the Golgi apparatus.  (+info)

(7/189) A basic 18-amino acid peptide contains the polysulfate-binding domain responsible for activation of the boar proacrosin/acrosin system.

Proacrosin is the zymogen of acrosin, a serine protease localized in the acrosomal matrix of mammalian sperm. Proacrosin/acrosin binds to solubilized zona pellucida glycoproteins (ZPGs) and various polysulfates in a non-enzymatic mechanism. In addition, both polysulfates and ZPGs induce proacrosin activation once they bind to the polysulfate-binding domain (PSBD) of the enzyme. We show here that the peptide (43)IFMYHNNRRYHTCGGILL(60) inhibited the proacrosin activation induced by either fucoidan or ZPGs. In addition, the peptide was recognized by the monoclonal antibody C5F10, which is directed against the PSBD region. Our data suggest that the PSBD is composed of many "subsites" that may or may not interact with each other.  (+info)

(8/189) Trypsin/acrosin inhibitor activity of rat and guinea pig caltrin proteins. Structural and functional studies.

Dramatic inhibition of trypsin activity by rat caltrin and guinea pig caltrin I was spectrophotometrically demonstrated using the artificial substrate benzoylarginyl ethyl ester. Approximately 6% and 21% of residual proteolytic activity was recorded after preincubating the enzyme with 0.22 and 0.27 microM rat caltrin and guinea pig caltrin I, respectively. Reduction and carboxymethylation of the cysteine residues abolished the inhibitor activity of both caltrin proteins. Rat caltrin and guinea pig caltrin I show structural homology with secretory trypsin/acrosin inhibitor proteins isolated from boar and human seminal plasma and mouse seminal vesicle secretion and share a fragment of 13 amino acids of almost identical sequence (DPVCGTDGH/K/ITYG/AN), which is also present in the structure of Kazal-type trypsin inhibitor proteins from different mammalian tissues. Bovine, mouse, and guinea pig caltrin II, three caltrin proteins that have no structural homology with rat caltrin or guinea pig caltrin I, lack trypsin inhibitor activity. Rat caltrin, guinea pig caltrin I, and the mouse seminal vesicle trypsin inhibitor protein P12, which also inhibits Ca(2+) uptake into epididymal spermatozoa (mouse caltrin I), bound specifically to the sperm head, on the acrosomal region, as detected by indirect immunofluorescence. They also inhibited the acrosin activity in the gelatin film assay. Caltrin I may play an important role in the control of sperm functions such as Ca(2+) influx in the acrosome reaction and activation of acrosin and other serine-proteases at the proper site and proper time to ensure successful fertilization.  (+info)

*  Acrosin
... is a digestive enzyme that acts as a protease. In humans, acrosin is encoded by the ACR gene. Acrosin is released from ... the high concentrations of PCI would inhibit acrosin from inflicting proteolytic damage on nearby tissues. β-acrosin ... Acrosin is the major proteinase present in the acrosome of mature spermatozoa. It is stored in the acrosome in its precursor ... Acrosin regulation has been found to occur through Protein C inhibitor (PCI). PCI is present in the male reproductive tract at ...
*  Acrosin binding protein
... is a protein that in humans is encoded by the ACRBP gene. The protein encoded by this gene is similar ... Acrosin binding protein". Retrieved 2016-08-01. Okumura H, Noguchi Y, Uenaka A, Aji T, Ono T, Nakagawa K, Aoe M, Shimizu N, ... the sperm acrosome and is thought to function as a binding protein to proacrosin for packaging and condensation of the acrosin ...
*  Kazal domain
... acrosin inhibitor; and elastase inhibitor. These proteins contain between 1 and 7 Kazal-type inhibitor repeats. The structure ...
*  Acrosome reaction
Acrosin digests the zona pellucida and membrane of the oocyte. Part of the sperm's cell membrane then fuses with the egg cell's ... In mammals the acrosome reaction releases hyaluronidase and acrosin; their role in fertilization is not yet clear. The ... by releasing hyaluronidase from the acrosome to digest cumulus cells surrounding the oocyte and exposing acrosin attached to ...
*  Spermosin
Evidence for the presence of spermosin, a novel acrosin-like enzyme". J. Biol. Chem. 259: 2900-2904. PMID 6365918. Sawada, H.; ... Sawada, H.; Someno, T. (1996). "Substrate specificity of ascidian sperm trypsin-like proteases, spermosin and acrosin". Mol. ... spermosin and acrosin, in fertilization of the ascidian, Halocynthia roretzi: inhibitory effects of leupeptin analogs on enzyme ...
*  ZP3
Furlong LI, Harris JD, Vazquez-Levin MH (2005). "Binding of recombinant human proacrosin/acrosin to zona pellucida (ZP) ...
*  SPINK2
Serine protease inhibitor Kazal-type 2 also known as acrosin-trypsin inhibitor is a protein that in humans is encoded by the ... Fink E, Hehlein-Fink C, Eulitz M (1990). "Amino acid sequence elucidation of human acrosin-trypsin inhibitor (HUSI-II) reveals ... Möritz A, Lilja H, Fink E (1991). "Molecular cloning and sequence analysis of the cDNA encoding the human acrosin-trypsin ... "Entrez Gene: SPINK2 serine peptidase inhibitor, Kazal type 2 (acrosin-trypsin inhibitor)". Wapenaar MC, Monsuur AJ, Poell J, et ...
*  Acrosome
... including hyaluronidase and acrosin). These enzymes break down the outer membrane of the ovum, called the zona pellucida, ...
*  Protein C inhibitor
Zheng X, Geiger M, Ecke S, Bielek E, Donner P, Eberspächer U, Schleuning WD, Binder BR (August 1994). "Inhibition of acrosin by ... male infertility.Protein C inhibitor has a great role in reproduction as it has ability to inhibit the sperm protease acrosin. ...
*  Two-spotted bumble bee
B. bimaculatus venom contains additional proteins, including acrosin and a tryptic amidase related to clotting enzymes. "Bombus ...
*  Reversible inhibition of sperm under guidance
This in turn causes both acrosin and hyaluronidase enzymes to leak out of the sperm, making the sperm infertile. The safety of ...
*  Complement component 1s
C1 esterase and acrosin, for peptide p-nitroanilide substrates". Biochimica et Biophysica Acta. 996 (1-2): 89-94. doi:10.1016/ ...
*  List of EC numbers (EC 3)
Now EC 3.4.21.34 (plasma kallikrein) and EC 3.4.21.35 (tissue kallikrein) EC 3.4.21.9: enteropeptidase EC 3.4.21.10: acrosin EC ...
*  TMPRSS11D
... acrosin, and mast cell tryptase. The noncatalytic region has little similarity to other known proteins. This protein may play ...
*  Index of biochemistry articles
... acrosin - actin - action potential - activation energy - active site - active transport - adenosine - adenosine diphosphate ( ...
*  List of enzymes
Acrosin (EC 3.4.21.10) Factor VII (EC 3.4.21.21) Factor IX (EC 3.4.21.22) Prolyl oligopeptidase (EC 3.4.21.26) Factor XI (EC ...
*  List of MeSH codes (D08)
... acrosin MeSH D08.811.277.656.300.760.176 --- chymotrypsin MeSH D08.811.277.656.300.760.198 --- complement factor b MeSH D08.811 ...
Sperm-associated acrosin inhibitor elisa and antibody  Sperm-associated acrosin inhibitor elisa and antibody
Recombinant Protein and Sperm-associated acrosin inhibitor Antibody at MyBioSource. Custom ELISA Kit, Recombinant Protein and ... Sperm-associated acrosin inhibitor. Sperm-associated acrosin inhibitor ELISA Kit. Sperm-associated acrosin inhibitor ... Sperm-associated acrosin inhibitor Antibody. Also known as Sperm-associated acrosin inhibitor (AI).. Inhibits acrosin.. ... Inhibits acrosin.. Below are the list of possible Sperm-associated acrosin inhibitor products. If you cannot find the target ...
more infohttps://www.mybiosource.com/protein_family.php?root=sperm-associated-acrosin-inhibitor
Acrosin - Wikipedia  Acrosin - Wikipedia
Acrosin is a digestive enzyme that acts as a protease. In humans, acrosin is encoded by the ACR gene. Acrosin is released from ... the high concentrations of PCI would inhibit acrosin from inflicting proteolytic damage on nearby tissues. β-acrosin ... Acrosin is the major proteinase present in the acrosome of mature spermatozoa. It is stored in the acrosome in its precursor ... Acrosin regulation has been found to occur through Protein C inhibitor (PCI). PCI is present in the male reproductive tract at ...
more infohttps://en.wikipedia.org/wiki/Acrosin
Acrosin binding protein - Wikipedia  Acrosin binding protein - Wikipedia
Acrosin binding protein is a protein that in humans is encoded by the ACRBP gene. The protein encoded by this gene is similar ... Acrosin binding protein". Retrieved 2016-08-01. Okumura H, Noguchi Y, Uenaka A, Aji T, Ono T, Nakagawa K, Aoe M, Shimizu N, ... the sperm acrosome and is thought to function as a binding protein to proacrosin for packaging and condensation of the acrosin ...
more infohttps://en.wikipedia.org/wiki/Acrosin_binding_protein
Acrosin | definition of acrosin by Medical dictionary  Acrosin | definition of acrosin by Medical dictionary
... acrosin explanation free. What is acrosin? Meaning of acrosin medical term. What does acrosin mean? ... Looking for online definition of acrosin in the Medical Dictionary? ... Release of acrosin and acrosin inhibitor from human spermatozoa.. Spermicidal action of a protein isolated from ethanolic root ... Acrosin , definition of acrosin by Medical dictionary https://medical-dictionary.thefreedictionary.com/acrosin ...
more infohttps://medical-dictionary.thefreedictionary.com/acrosin
ACR - Acrosin precursor - Sus scrofa (Pig) - ACR gene & protein  ACR - Acrosin precursor - Sus scrofa (Pig) - ACR gene & protein
Acrosin is the major protease of mammalian spermatozoa. It is a serine protease of trypsin-like cleavage specificity, it is ... "Acrosin inhibitor in extract of the zonae pellucidae of porcine oocytes.". Veselsky L., Cechova D., Jonakova V.. Int. J. Fertil ... "Kinetics of inhibition of sperm beta-acrosin activity by suramin.". Hermans J.M., Haines D.S., James P.S., Jones R.. FEBS Lett ... "Inhibition of acrosin by protein C inhibitor and localization of protein C inhibitor to spermatozoa.". Zheng X., Geiger M., ...
more infohttps://www.uniprot.org/uniprot/P08001
ACR - Acrosin precursor - Homo sapiens (Human) - ACR gene & protein  ACR - Acrosin precursor - Homo sapiens (Human) - ACR gene & protein
Acrosin is the major protease of mammalian spermatozoa. It is a serine protease of trypsin-like cleavage specificity, it is ... AcrosinAdd BLAST. 402. ,p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the ... Acrosin light chainAdd BLAST. 23. ,p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide ... "Inhibition of acrosin by protein C inhibitor and localization of protein C inhibitor to spermatozoa.". Zheng X., Geiger M., ...
more infohttp://www.uniprot.org/uniprot/P10323
Acrosin Binding Protein (ACRBP) ELISA Kits  Acrosin Binding Protein (ACRBP) ELISA Kits
acrosin binding protein , proacrosin binding protein sp32 , acrosin-binding protein-like , acrosin-binding protein , cancer/ ... More ELISA Kits for Acrosin Binding Protein Interaction Partners. Horse (Equine) Acrosin Binding Protein (ACRBP) interaction ... Additionally we are shipping Acrosin Binding Protein Antibodies (24) and Acrosin Binding Protein Proteins (4) and many more ... Acrosin Binding Protein (ACRBP) Antigen Profile Antigen Summary The protein encoded by this gene is similar to proacrosin ...
more infohttps://www.antibodies-online.com/abstract/Acrosin+Binding+Protein+
RCSB PDB - 1FIZ: THREE DIMENSIONAL STRUCTURE OF BETA-ACROSIN FROM BOAR SPERMATOZOA  RCSB PDB - 1FIZ: THREE DIMENSIONAL STRUCTURE OF BETA-ACROSIN FROM BOAR SPERMATOZOA
THREE DIMENSIONAL STRUCTURE OF BETA-ACROSIN FROM BOAR SPERMATOZOA ... BETA-ACROSIN HEAVY CHAIN. A. 263. Sus scrofa. Mutation(s): 0 ... Effector sites in the three-dimensional structure of mammalian sperm beta-acrosin.. Tranter, R., Read, J.A., Jones, R., Brady, ... beta-acrosin is thought to be multifunctional with roles in acrosomal exocytosis, as a receptor for zona pellucida proteins, ... During fertilization proacrosin autoactivates to form beta-acrosin, in which there is a 'light' chain cross-linked to a 'heavy ...
more infohttps://www.rcsb.org/structure/1fiz
Acrosin-trypsin inhibitor | definition of Acrosin-trypsin inhibitor by Medical dictionary  Acrosin-trypsin inhibitor | definition of Acrosin-trypsin inhibitor by Medical dictionary
What is Acrosin-trypsin inhibitor? Meaning of Acrosin-trypsin inhibitor medical term. What does Acrosin-trypsin inhibitor mean? ... Looking for online definition of Acrosin-trypsin inhibitor in the Medical Dictionary? Acrosin-trypsin inhibitor explanation ... redirected from Acrosin-trypsin inhibitor) SPINK2. A gene on chromosome 4q12 that encodes a strong inhibitor of acrosin in the ... Acrosin-trypsin inhibitor , definition of Acrosin-trypsin inhibitor by Medical dictionary https://medical-dictionary. ...
more infohttps://medical-dictionary.thefreedictionary.com/Acrosin-trypsin+inhibitor
acrosin | S1: Chymotrypsin | IUPHAR/BPS Guide to PHARMACOLOGY  acrosin | S1: Chymotrypsin | IUPHAR/BPS Guide to PHARMACOLOGY
acrosin - S1: Chymotrypsin. Detailed annotation on the structure, function, physiology, pharmacology and clinical relevance of ... 1986) Synthesis and inhibition of human acrosin and trypsin and acute toxicity of aryl 4-guanidinobenzoates. J. Med. Chem., 29 ... S1: Chymotrypsin: acrosin. Last modified on 14/07/2015. Accessed on 25/03/2018. IUPHAR/BPS Guide to PHARMACOLOGY, http://www. ...
more infohttp://www.guidetopharmacology.org/GRAC/ObjectDisplayForward?objectId=2327&familyId=751&familyType=ENZYME
Acrosin-binding protein elisa and antibody  Acrosin-binding protein elisa and antibody
Recombinant Protein and Acrosin-binding protein Antibody at MyBioSource. Custom ELISA Kit, Recombinant Protein and Antibody are ... Acrosin-binding protein. Acrosin-binding protein ELISA Kit. Acrosin-binding protein Recombinant. Acrosin-binding protein ... Also known as Acrosin-binding protein (Cancer/testis antigen 23) (CT23) (Cancer/testis antigen OY-TES-1) (Proacrosin-binding ... Below are the list of possible Acrosin-binding protein products. If you cannot find the target and/or product is not available ...
more infohttps://www.mybiosource.com/protein_family.php?root=acrosin-binding-protein
Major Goat Sperm 105 kDa Maturation Antigen: Purification, Characterization, and Effect of Its Antiserum on Acrosin Activity -...  Major Goat Sperm 105 kDa Maturation Antigen: Purification, Characterization, and Effect of Its Antiserum on Acrosin Activity -...
If you are a society or association member and require assistance with obtaining online access instructions please contact our Journal Customer Services team ...
more infohttp://onlinelibrary.wiley.com/doi/10.1111/j.1600-0897.1997.tb00250.x/pdf
Serum contents of immunoreactive pancreatic secretory trypsin inhibitor and seminal plasma acrosin-trypsin inhibitor in...  Serum contents of immunoreactive pancreatic secretory trypsin inhibitor and seminal plasma acrosin-trypsin inhibitor in...
Serum contents of immunoreactive pancreatic secretory trypsin inhibitor and seminal plasma acrosin-trypsin inhibitor in ...
more infohttps://epub.ub.uni-muenchen.de/9761/index.html
Subject: acrosin - PubAg Search Results  Subject: 'acrosin' - PubAg Search Results
In pigs, acrosin activity in extended semen is correlated with reproductive performance and has recently been identified as a ... However, the effects of GSH on the acrosin activity of good and poor freezability ejaculates (GFE and PFE, respe .... DOI:. ... Its main function is control of the serine protease in the acrosome, acrosin. Here we showed for the first time that Spink is ... acrosin, etc ; acrosome; bucks; cryopreservation; freezing; goats; malondialdehyde; oxidative stress; semen; tiger nut milk; ...
more infohttps://pubag.nal.usda.gov/?q=%22acrosin%22&search_field=subject&sort=date-desc
Subject: acrosin / Journal: Animal reproduction science - PubAg Search Results  Subject: 'acrosin' / Journal: Animal reproduction science - PubAg Search Results
You searched for: Subject 'acrosin' Remove constraint Subject: 'acrosin' Journal Animal reproduction science Remove constraint ... 8. Proacrosin/acrosin quantification as an indicator of acrosomal integrity in fresh and frozen dog spermatozoa ... Acrosin Binding Protein (ACRBP) is specifically localized in the acrosome of germ cells of several species, including mice, ... 7. Fine structure and morphology of sterlet (Acipenser ruthenus L. 1758) spermatozoa and acrosin localization ...
more infohttps://pubag.nal.usda.gov/?f%5Bjournal_name%5D%5B%5D=Animal+reproduction+science&q=%22acrosin%22&search_field=subject&sort=relevance
DUGi: Ítem | Recercat - Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) aregood markers to predict boar...  DUGi: Ítem | Recercat - Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) aregood markers to predict boar...
Because two proteins, acrosin binding protein (ACRBP) and triosephosphate isomerase (TPI), presented the highest significant ... Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) aregood markers to predict boar sperm freezing capacity ... Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) aregood markers to predict boar sperm freezing capacity ... Because two proteins, acrosin binding protein (ACRBP) and triosephosphate isomerase (TPI), presented the highest significant ...
more infohttp://dugi.udg.edu/item/http:@@@@[email protected]@[email protected]@297724
Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) are good markers to predict boar sperm freezing capacity. -...  Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) are good markers to predict boar sperm freezing capacity. -...
Because two proteins, acrosin binding protein (ACRBP) and triosephosphate isomerase (TPI), presented the highest significant ... Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) are good markers to predict boar sperm freezing capacity. ... Acrosin-binding protein (ACRBP) and triosephosphate isomerase (TPI) are good markers to predict boar sperm freezing capacity. ... Because two proteins, acrosin binding protein (ACRBP) and triosephosphate isomerase (TPI), presented the highest significant ...
more infohttps://www.obs-gyn.ox.ac.uk/publications/512497
ON THE TERATOGENESIS OF ROUND-HEADED SPERMATOZOA - INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED...  ON THE TERATOGENESIS OF ROUND-HEADED SPERMATOZOA - INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED...
INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED ACROSIN-INHIBITOR, AND THE OUTER ACROSOMAL MEMBRANE ... INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED ACROSIN-INHIBITOR, AND THE OUTER ACROSOMAL MEMBRANE ... INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED ACROSIN-INHIBITOR, AND THE OUTER ACROSOMAL MEMBRANE ... INVESTIGATIONS WITH ANTIBODIES AGAINST ACROSIN, AN INTRAACROSOMALLY LOCATED ACROSIN-INHIBITOR, AND THE OUTER ACROSOMAL MEMBRANE ...
more infohttps://pub.uni-bielefeld.de/publication/1657948
Activity Kits  Activity Kits
Spermfunc® Acrosin Kit for The Quantitative Test of Spermatozoan Acrosin Activity ... Min. Order: 2 Kit ...
more infohttp://www.made-in-china.com/products-search/hot-china-products/Activity_Kits.html
Pregnancy and Parturition  Flashcards by Bridey Sabin | Brainscape  Pregnancy and Parturition Flashcards by Bridey Sabin | Brainscape
Proteases and acrosin are enzymes. How do they function in reproduction?. A) They neutralize the mucous secretions of the ... D) Proteases and acrosin proteinases of the sperm disperse the cells of the corona radiata of the oocyte. ...
more infohttps://www.brainscape.com/flashcards/pregnancy-and-parturition-1357692/packs/1964503
  • Because two proteins, acrosin binding protein (ACRBP) and triosephosphate isomerase (TPI), presented the highest significant differences between GFE and PFE groups in two-dimensional difference gel electrophoresis assessment, Western blot analyses for ACRBP and TPI were also performed for validation. (udg.edu)
  • An important structural element of β-acrosin is a highly charged patch (formed through both amino acids and post-translational modifications) on its surface region, that has been termed the "anion binding exosite. (wikipedia.org)
  • indirectly protects component of the male genital tract from being degraded by excessive released acrosin. (genecards.org)