• [ 4 ] The E6 protein product of these high-risk HPVs binds to the tumor suppressor protein p53, which is thought to disrupt the p53-dependent control of the cell cycle. (medscape.com)
  • Pocket proteins Rb, p107 and p130 play central roles in cell cycle progression and differentiation. (eu.org)
  • A phosphorylation downstream to the core motif acts as a switch that binds to a positively charged pocket only present in p107/p130. (eu.org)
  • The LxDLFD motif ( LIG_RB_pABgroove_1 ) mediates binding to a highly conserved deep groove formed in the interface between the A and B subdomains of the Rb, p107 and p130 pocket domains. (eu.org)
  • Chief among the intracellular signals is the phosphorylation of proteins belonging to the pocket protein family, such as p107, p130 and retinoblastoma protein (Rb). (bdbiosciences.com)
  • Differential pull-down experiments with H3-tails synthesized from l- and d-amino acids uncovered that histone acetyltransferase 1 (HAT1) and retinoblastoma-binding protein 7 (RBBP7) are part of the protein network, which interacts with the unmodified H3-tail. (edu.sa)
  • Retinoblastoma protein interacts with ATF2 and JNK/p38 in stimulating the transforming growth factor-beta2 promoter. (nih.gov)
  • p53 affects the transcription of many target genes and interacts with key cellular proteins. (molvis.org)
  • Multiple posttranslational modifications (PTMs) of histone proteins including site-specific phosphorylation of serine and threonine residues govern the accessibility of chromatin. (edu.sa)
  • According to the histone code theory, PTMs recruit regulatory proteins or block their access to chromatin. (edu.sa)
  • The 48 kDa subunit, RETINOBLASTOMA-BINDING PROTEIN 4, is also a component of several other protein complexes involved in chromatin remodeling. (lookformedical.com)
  • A retinoblastoma-binding protein that is involved in CHROMATIN REMODELING, histone deacetylation, and repression of GENETIC TRANSCRIPTION. (lookformedical.com)
  • Although initially discovered as a retinoblastoma binding protein it has an affinity for core HISTONES and is a subunit of chromatin assembly factor-1 and polycomb repressive complex 2. (lookformedical.com)
  • The repeating structural units of chromatin, each consisting of approximately 200 base pairs of DNA wound around a protein core. (lookformedical.com)
  • This family of proteins includes a wide variety of classes, including CYCLIN-DEPENDENT KINASES, mitogen-activated kinases, CYCLINS, and PHOSPHOPROTEIN PHOSPHATASES as well as their putative substrates such as chromatin-associated proteins, CYTOSKELETAL PROTEINS, and TRANSCRIPTION FACTORS. (lookformedical.com)
  • The LxCxE motif binds to all pocket proteins and is present in chromatin regulators such as HDAC and KDM5A and in viral proteins. (eu.org)
  • 1) Various complex formation of Histone methyltransferases for repressive chromatin and the molecular basis of their formation, 2) Relationship between heterochromatin formation and repressive histone modification on inactive X chromosome, 3) Involvement of an HP1 binding protein in pathway choice for repairing double-strand breaks. (nii.ac.jp)
  • Apoptosis induction was further confirmed by morphological changes, an increase in Caspase 3/7 and a decrease in the ATP levels. (biomedcentral.com)
  • We also observed induction of apoptosis in these cells following silencing of retinoblastoma binding protein 6 (RBBP6), with upregulation of p53 and bax mRNA expression, and a reduction in Bcl2 gene expression. (therichardrosereport.com)
  • An aberrant miRNA expression could contribute to cancer development and progression [ 6 , 7 ] and could affect their target genes that are involved in many biological processes, such as cell differentiation, proliferation, apoptosis, metabolism, and development [ 8 ]. (hindawi.com)
  • For example, E6 degrades and binds tumor suppressor p53 and proapoptotic proteins BAK, thereby raising host-cell level of resistance to apoptosis and permitting viral DNA replication (3, 4). (insulin-receptor.info)
  • Although purvalanol-induced cell cycle arrest and apoptotic cell death were demonstrated in prostate ( 5 ), breast ( 6 ) and colon cancer cells ( 7 ), the exact molecular mechanism of purvanol-induced apoptosis has not been elucidated yet. (spandidos-publications.com)
  • The various markers that enable assessment of the progression of preneoplastic lesions to spindle cell carcinoma include the p16 protein, which halts the cell cycle and induces apoptosis by pRb-mediated phosphorylation of cyclin-dependent kinase 4 (CDK4). (bvsalud.org)
  • A family of cellular proteins that mediate the correct assembly or disassembly of polypeptides and their associated ligands. (lookformedical.com)
  • The HPV E7 peptide contains the LxCxE motif, shared by other Rb-binding viral and cellular proteins. (nih.gov)
  • Although intracellular signal transduction is often portrayed as a protein kinase 'domino effect', the counterbalancing function of phosphatases, and thus the control of phosphatase activity, is equally relevant to proper regulation of cellular function. (ac.be)
  • Although viewed as a constitutive housekeeping enzyme in the past, PP2A is a highly regulated phosphatase and is emerging as an important regulator of multiple cellular processes involving protein phosphorylation. (ac.be)
  • But advances in the understanding of protein phosphatases make now clear that these enzymes are precisely regulated and are as important as kinases in the regulation of cellular processes involving protein phosphorylation. (ac.be)
  • 2 Protein phosphatase 2A (PP2A) is a very abundant - it accounts for as much as 1% of total cellular proteins - ubiquitous and remarkably conserved enzyme. (ac.be)
  • Cloning of cDNAs for cellular proteins that bind to the retinoblastoma gene product. (wikigenes.org)
  • Cells express a pool of thousands of different proteins that need to be tightly controlled for proper cellular structure, organization, and function. (hindawi.com)
  • The small protein ubiquitin plays a vital role in virtually all aspects of cellular life. (intechopen.com)
  • Upon phosphorylation of S608 in a flexible linker of Rb, this "RbLoop" mimics the LxDLFD groove motif, competing with E2F binding. (eu.org)
  • 1 Reversible protein phosphorylation is an important regulatory mechanism that controls the activities of a myriad of proteins and is thus involved in virtually every major physiological process. (ac.be)
  • 4 While proteins can be phosphorylated on nine amino acids, serine, threonine and tyrosine phosphorylation are by far the most predominant in eukaryotic cells. (ac.be)
  • The cyclinD/CDK4/6 complexes induce the phosphorylation of retinoblastoma (Rb) protein and the release of E2F, which trigger G1 cell cycle progression. (biomedcentral.com)
  • A series of signal transduction events starting from the activation of cyclin-dependent kinase 2 (CDK2) to binding of E2F -target transcription to phosphorylation of Rb helps maintain cell-cycle progression. (bdbiosciences.com)
  • It is found as a subunit of protein complexes that are in involved in the enzymatic modification of histones including the Mi2 and Sin3 histone deacetylase complexes and the polycomb repressive complex 2. (lookformedical.com)
  • Protein Phosphatase 2A (PP2A) is a widely expressed family of protein phosphatases made of a core dimer, composed of a catalytic (C) subunit and a structural (A) subunit, in association with a third variable regulatory (B) subunit. (ac.be)
  • Together, we demonstrate that Ocln is a downstream target of Src kinase and promotes LD secretion by binding to BTN1a1 and XOR. (bvsalud.org)
  • On the role of protein kinase subunits in the control of eukaryotic gene expression. (nih.gov)
  • Alternatively, E7 inhibits tumor suppressor retinoblastoma 1 (RB1) release a E2F transcription elements, stimulates cyclin-dependent kinase 2 (CDK2)/cyclin A (7) aswell as CDK2/cyclin E organic (8), therefore abrogating cell routine arrest and stimulating proliferation (9). (insulin-receptor.info)
  • TGF-P has been shown to inhibit cyclin dependent kinase activity, which leads to activation of the retinoblastoma protein (pRB) and growth arrest. (uwo.ca)
  • The NEMO protein is required for the activation of the kinase complex. (medscape.com)
  • Cyclin-dependent kinases (CDKs), are members of the serine-threonine protein kinase family and are responsible for taking control of cell cycle regulation in eukaryotic cells. (spandidos-publications.com)
  • Hox proteins finely coordinate antero-posterior axis during embryonic development and through their action specific target genes are expressed at the right time and space to determine the embryo body plan. (biomedcentral.com)
  • HD binding specificity increases by protein-protein interactions with a diversity of cofactors that outline the Hox interactome and determine the transcriptional landscape of the selected target genes. (biomedcentral.com)
  • This plethora of Hox protein-protein interactions clearly points to a Hox-driven transcription process in which every Hox homeoprotein could selectively recruit GTFs to achieve specificity and activate or repress target genes during Drosophila development, although the precise molecular mechanisms remain elusive [ 25 ]. (biomedcentral.com)
  • KDM5A-mediated histone H3 lysine 4 demethylation contributes to silencing of retinoblastoma target genes (Chicas et al. (atlasgeneticsoncology.org)
  • This study aimed to evaluate the expression levels of miR-34a and 11 of its bioinformatically selected target genes and proteins to test their potential dysregulation in RCC. (hindawi.com)
  • We now show that HGE bacteria, and the HGE-44 protein, induce IL-8 secretion in a promyelocytic (HL-60) cell line that has been differentiated along the neutrophil lineage with retinoic acid and in neutrophils. (neuroprobe.com)
  • Lacking proteosomal function on aggregates of unfolded proteins, ER stress may induce autophagic machinery. (spandidos-publications.com)
  • During the first stage called G1, cells monitor their environment and, when the requisite signals are received, the cells synthesize RNA and proteins to induce growth. (bdbiosciences.com)
  • Pocket proteins play essential roles in cell cycle progression, quiescence and differentiation, and their functional disruption is associated with human cancer. (eu.org)
  • The most studied function of the Rb protein is in the regulation of cell cycle progression at the G1/S boundary ( Giacinti,2006 ). (eu.org)
  • During growth, genes associated with protein ubiquitination/deubiquitination, cell cycle progression, and proteasomal degradation were affected, while genes linked to protein and carbohydrate catabolism were affected during early development. (frontiersin.org)
  • Conclusion: p63, p16, MIB, Cal A, Cys A are markedly expressed and p16 is strongly suppressed in oral cavity tumors, which suggests that the latter protein may play a role in negative regulation of cell cycle progression. (bvsalud.org)
  • This gene is located in a cluster of closely related salivary proline-rich proteins on chromosome 12. (cancerindex.org)
  • As master transcriptional regulators, Hox proteins recognize DNA through the homeodomain (HD) and interact with a multitude of proteins, including general transcription factors and other cofactors. (biomedcentral.com)
  • Here we report Antennapedia (Antp) Hox protein-protein interaction with the TATA-binding protein (TBP) and the formation of novel trimeric complexes with TFIIEβ and Extradenticle (Exd), as well as its participation in transcriptional regulation. (biomedcentral.com)
  • Mdm2 binds directly to the transcriptional activation domain of p53 and blocks p53-dependent transcription. (molvis.org)
  • Activated and released IRE1α acts as an RNase to initiate transcription of XBP1 mRNA and it becomes a transcriptional activator for unfolded protein response (UPR) gene targets, such as BiP and calreticulin ( 10 ). (spandidos-publications.com)
  • 11. Amsel, A. & Roussel, J. Motivational properties of ences in post-transcriptional processes spark interest in the development of frustration: I. Effect on a running response of the (protein redistribution, degradation), pharmacotherapies that selectively reg- addition of frustration to the motivational com- plex. (lu.se)
  • Various physiological and pathological conditions such as glucose starvation, inhibition of protein glycosylation and oxidative stress may cause an accumulation of unfolded proteins in the endoplasmic reticulum (ER), leading to the unfolded protein response (UPR) and autophagy. (spandidos-publications.com)
  • Endoplasmic reticulum (ER) is an essential organelle responsible for protein synthesis, folding, post-translational modification of proteins and protein trafficking in eukaryotes ( 8 ). (spandidos-publications.com)
  • part of these networks is also established by contacts of the mitochondria with organelles (e.g., with endoplasmic reticulum, plasma membrane, and peroxisomes) [ 7 - 9 ]. (hindawi.com)
  • p53 E3 ubiquitin protein ligase homolog (Mdm2) is an important negative regulator of p53. (molvis.org)
  • e.g. they bind selectively to DNA, stimulate transcription resulting in tissue-specific RNA synthesis and undergo specific changes in response to various hormones or phytomitogens. (lookformedical.com)
  • These novel interactions open the possibility to analyze promoter function and gene expression to measure transcription factor binding dynamics at target sites throughout the genome. (biomedcentral.com)
  • Of particular interest are the protein interactions that occur between Hox proteins and general transcription factors (GTF) from the RNA Pol II basal transcription machinery. (biomedcentral.com)
  • Here, we focused on the interplay between Antp and the basal transcription machinery and show the direct interaction of Antp with TBP through the poly-glutamine (PolyQ) regions of both proteins. (biomedcentral.com)
  • LIG_RB_pABgroove_1 (LxDLFD), LIG_RB_LxCxE_1 (LxCxE) and LIG_RBL1_LxSxE_2 (LxSxE).The LxDLFD motif binds to a deep groove formed between the A and B subdomains and is present in E2F family transcription factors (E2F1-5). (eu.org)
  • Interaction of retinoblastoma gene product with transcription factors ATFa and ATF2. (nih.gov)
  • Activation of the transcription factor nuclear factor KB (NF-KB) requires the NEMO protein. (medscape.com)
  • The accumulation of both Cyclin and CKI proteins is tightly regulated at the level of transcription. (intechopen.com)
  • Caspase 3/7 activity was also measured using 96 well-plate following treatment. (therichardrosereport.com)
  • RESULTS: From the treatment with varying concentrations of Cannabis sativa extract, cannabidiol and cisplatin, we have observed that the three compounds induced antiproliferation of PC3 cancer cell lines through the activation of caspase 3/7 activity. (therichardrosereport.com)
  • Purvalanol induced mitochondrial membrane potential loss, caspase-7 and caspase-3 activation and PARP cleavage following a 48 h treatment. (spandidos-publications.com)
  • In addition, the outlined methodology is generally applicable for studying specific binding partners of unmodified histone tails. (edu.sa)
  • A histone chaperone protein that plays a role in the deposition of NUCLEOSOMES on newly synthesized DNA. (lookformedical.com)
  • and nonhistone proteins (CHROMOSOMAL PROTEINS, NON-HISTONE) found within the nucleus of a cell. (lookformedical.com)
  • The proteostasis network (PN) is an assembly of distinct dynamic molecular pathways that control the functionality of the proteome (proteome homeodynamics) during protein synthesis, folding, trafficking, and degradation. (hindawi.com)
  • The LxCxE and LxSxE motifs bind to a highly conserved cleft in the B subdomain. (eu.org)
  • Using gene-targeted mice where the LXCXE binding cleft on pRB has been disrupted (R b l^ and RblNF), we have discovered that pRB plays a crucial role in mammary gland development. (uwo.ca)
  • The function of specific proteins from this organism are the subject of intense scientific interest and have been used to derive basic understanding of the functioning similar proteins in higher eukaryotes. (lookformedical.com)
  • The effects of POP inhibition and knockdown on the proliferation of cultured human estrogen receptor-positive (ER+) MCF7 and T47D, and ER-negative (ER-) MDA-MB-231 breast cancer cell lines and the MCF12A non-tumorigenic epithelial cell line were tested by analyzing their influence on cell proliferation (WST-1 assay), cell viability (trypan blue exclusion assay), and cell cycle arrest (cell cycle analysis, cell cycle regulator proteins expression). (cancerindex.org)
  • Overall, this study reveals the impact of cln5 -deficiency on gene expression in D. discoideum , provides insight on the genes and proteins that play a role in regulating Cln5-dependent processes, and sheds light on the molecular mechanisms underlying CLN5 disease. (frontiersin.org)
  • Inactivation of Rb may contribute to many human malignancies including familial retinoblastoma, small-cell lung carcinomas, cervical carcinomas, prostate carcinomas, breast carcinomas, and some forms of leukaemias ( Burkhart,2008 ). (eu.org)
  • Additionally, GPC2 is expressed in other pediatric embryonal malignancies including medulloblastoma and retinoblastoma, suggesting that GPC2 may be an immunotherapy target in other tumor types. (aacrjournals.org)
  • Cell-cycle-related proteins, such as cyclins or cyclin-dependent kinases, may have functions beyond that of cell cycle regulation. (biomedcentral.com)
  • This study identified the mitochondrial dysfunction and lipid metabolism pathways as the major pathways to be deregulated in retinoblastoma. (elsevierpure.com)
  • We further validated few of the differentially expressed proteins by immunohistochemistry on primary tumors. (elsevierpure.com)
  • Insulin growth factor 2 mRNA binding protein 1 (IGF2BP1), chromogranin A, fetuin A (ASHG), Rac GTPase-activating protein 1 and midkine that were found to be overexpressed in retinoblastoma were further confirmed by immunohistochemistry by staining 15 independent retinoblastoma tissue sections. (elsevierpure.com)
  • Ageing leads to a gradual dysfunction of the proteostasis network and thus to proteome instability due to accumulation of damaged and/or misfolded proteins [ 2 ]. (hindawi.com)
  • The p63 protein, a homologue of p53, may be associated with tumor formation in the epithelial tissue, acting as an oncogene 11,12 . (bvsalud.org)
  • Scope includes mutations and abnormal protein expression. (cancerindex.org)
  • NEMO consists of 10 exons, and most mutations cause deletions of exons 4-10, resulting in a truncated protein. (medscape.com)
  • Hypomorphic mutations may impair but not abolish NEMO protein function. (medscape.com)
  • The putative targets were cell-surface proteins (or proteins with extracellular epitopes) highly expressed in neuroblastoma compared with normal tissues, and expressed in the majority of tumors. (aacrjournals.org)
  • This gene encodes a protein which binds to underphosphorylated but not phosphorylated pRB. (utsouthwestern.edu)
  • The activity of CDKs is controlled by their binding to coactivator subunits termed Cyclins, as well as by CDK inhibitory proteins termed CKIs. (intechopen.com)
  • Cystatin A (Cys A), a cysteine protease inhibitor, is a precursor of proteins involves in keratinocyte keratinization, and is expressed during the late phase of differentiation of these cells. (bvsalud.org)
  • The protein encoded by this gene is a retinoblastoma binding protein that may play a role in the regulation of cell proliferation and differentiation. (wikipedia.org)
  • Lipid droplets (LD) are evolutionarily conserved lipid-enriched organelles with a diverse array of cell- and stimulus-regulated proteins. (bvsalud.org)
  • Small chromosomal proteins (approx 12-20 kD) possessing an open, unfolded structure and attached to the DNA in cell nuclei by ionic linkages. (lookformedical.com)
  • Proteins that control the CELL DIVISION CYCLE. (lookformedical.com)
  • Proteins found in the nucleus of a cell. (lookformedical.com)
  • The adenovirus E1A protein mimics the LxDLFD motif and competes with E2F for binding to Rb, promoting E2F activation and cell proliferation. (eu.org)
  • [ 7 , 8 ] Sunshine et al offer that perhaps there are multiple cell-line precursors of Merkel cell carcinoma. (medscape.com)
  • and cell differentiation ( SOX2 and TGFB3 ) as well as immunohistochemical assay for VEGFA, TP53, Bcl2, TGFB1, and Ki67 protein expression have been performed in 85 FFPE RCC tumor specimens. (hindawi.com)
  • We further verified the effect of IGF2BP1 on cell proliferation and migration capability of a retinoblastoma cell line using knockdown studies. (elsevierpure.com)
  • Further knockdown studies of IGF2BP1 in retinoblastoma cell lines revealed it as a prospective therapeutic target for retinoblastoma. (elsevierpure.com)
  • Purvalanol is a purine-derived CDKI that binds with a high selectivity and competitively to the ATP binding side of CDK1/2 and leads to G2/M cell cycle arrest ( 4 ). (spandidos-publications.com)
  • Another protein, calgranulin A (Cal A), is involved in the regulation of several cell processes, including the cell cycle and cell differentiation. (bvsalud.org)
  • Other markers, such as retinoblastoma and p53, may be related with early steps of carcinogenesis in oral cavity squamous cell carcinoma. (bvsalud.org)
  • Several cell cycle-associated proteins, such as Ki-67, are also used as indicators of cell proliferation. (bdbiosciences.com)
  • The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases. (lookformedical.com)
  • However, like most CLN proteins, the association of CLN5 with a defined biological pathway is still under investigation. (frontiersin.org)
  • Do not confuse with NUCLEOPROTEINS which are proteins conjugated with nucleic acids, that are not necessarily present in the nucleus. (lookformedical.com)
  • These include changes in the plasma membrane (such as loss of membrane symmetry and loss of membrane attachment), a condensation of the cytoplasm and nucleus, protein cleavage, and internucleosomal cleavage of DNA. (bdbiosciences.com)
  • Altered responsiveness to co- oup the nucleus accumbens reflect the behavioral approaches that incorporate caine and increased immobility in the forced swim test associated with elevated cAMP response ele- memory of associations between the extinction-like processes may have effi- ment binding protein in nucleus accumbens. (lu.se)
  • ER alerts a self-protective mechanism that is called ER stress during nutrient deprivation, pathogen infection, alterations in redox status, intraluminal Ca 2+ levels and folding defective protein conditions ( 9 ). (spandidos-publications.com)
  • NEMO is an ubiquitous protein that becomes active during embryogenesis. (medscape.com)
  • Extensive interactions in the N-terminal flanking region of E2F increase Rb-binding affinity ( Lee,2002 ). (eu.org)