FUNCTION: Tumor suppressor that is a key regulator of the G1/S transition of the cell cycle (PubMed:10499802). The hypophosphorylated form binds transcription regulators of the E2F family, preventing transcription of E2F-responsive genes (PubMed:10499802). Both physically blocks E2Fs transactivating...
FUNCTION: Tumor suppressor that is a key regulator of the G1/S transition of the cell cycle (PubMed:10499802). The hypophosphorylated form binds transcription regulators of the E2F family, preventing transcription of E2F-responsive genes (PubMed:10499802). Both physically blocks E2Fs transactivating domain and recruits chromatin-modifying enzymes that actively repress transcription (PubMed:10499802). Cyclin and CDK-dependent phosphorylation of RB1 induces its dissociation from E2Fs, thereby activating transcription of E2F responsive genes and triggering entry into S phase (PubMed:10499802). RB1 also promotes the G0-G1 transition upon phosphorylation and activation by CDK3/cyclin-C (PubMed:15084261). Directly involved in heterochromatin formation by maintaining overall chromatin structure and, in particular, that of constitutive heterochromatin by stabilizing histone methylation. Recruits and targets histone methyltransferases SUV39H1, KMT5B and KMT5C, leading to epigenetic transcriptional repression. Controls histone H4 'Lys-20' trimethylation. Inhibits the intrinsic kinase activity of TAF1. Mediates transcriptional repression by SMARCA4/BRG1 by recruiting a histone deacetylase (HDAC) complex to the c-FOS promoter. In resting neurons, transcription of the c-FOS promoter is inhibited by BRG1-dependent recruitment of a phospho-RB1-HDAC1 repressor complex. Upon calcium influx, RB1 is dephosphorylated by calcineurin, which leads to release of the repressor complex (By similarity). {ECO:0000250|UniProtKB:P13405, ECO:0000250|UniProtKB:P33568, ECO:0000269|PubMed:10499802, ECO:0000269|PubMed:15084261}.; FUNCTION: (Microbial infection) In case of viral infections, interactions with SV40 large T antigen, HPV E7 protein or adenovirus E1A protein induce the disassembly of RB1-E2F1 complex thereby disrupting RB1's activity. {ECO:0000269|PubMed:1316611, ECO:0000269|PubMed:17974914, ECO:0000269|PubMed:18701596, ECO:0000269|PubMed:2839300, ECO:0000269|PubMed:8892909}.
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GO - Biological processes (BP):
aortic valve morphogenesis [GO:0003180]; cell differentiation [GO:0030154]; cell division [GO:0051301]; cell morphogenesis involved in neuron differentiation [GO:0048667]; cellular response to insulin stimulus [GO:0032869]; cellular response to xenobiotic stimulus [GO:0071466]; chondrocyte different...
aortic valve morphogenesis [GO:0003180]; cell differentiation [GO:0030154]; cell division [GO:0051301]; cell morphogenesis involved in neuron differentiation [GO:0048667]; cellular response to insulin stimulus [GO:0032869]; cellular response to xenobiotic stimulus [GO:0071466]; chondrocyte differentiation [GO:0002062]; chromatin remodeling [GO:0006338]; digestive tract development [GO:0048565]; enucleate erythrocyte differentiation [GO:0043353]; glial cell apoptotic process [GO:0034349]; hepatocyte apoptotic process [GO:0097284]; heterochromatin assembly [GO:0031507]; maintenance of mitotic sister chromatid cohesion [GO:0034088]; myoblast differentiation [GO:0045445]; negative regulation of apoptotic signaling pathway [GO:2001234]; negative regulation of cell cycle [GO:0045786]; negative regulation of cell growth [GO:0030308]; negative regulation of cold-induced thermogenesis [GO:0120163]; negative regulation of DNA-binding transcription factor activity [GO:0043433]; negative regulation of epithelial cell proliferation [GO:0050680]; negative regulation of G1/S transition of mitotic cell cycle [GO:2000134]; negative regulation of gene expression [GO:0010629]; negative regulation of hepatocyte apoptotic process [GO:1903944]; negative regulation of inflammatory response [GO:0050728]; negative regulation of myofibroblast differentiation [GO:1904761]; negative regulation of protein kinase activity [GO:0006469]; negative regulation of protein serine/threonine kinase activity [GO:0071901]; negative regulation of smoothened signaling pathway [GO:0045879]; negative regulation of tau-protein kinase activity [GO:1902948]; negative regulation of transcription, DNA-templated [GO:0045892]; negative regulation of transcription by RNA polymerase II [GO:0000122]; negative regulation of transcription involved in G1/S transition of mitotic cell cycle [GO:0071930]; neuron apoptotic process [GO:0051402]; neuron maturation [GO:0042551]; neuron projection development [GO:0031175]; positive regulation of collagen fibril organization [GO:1904028]; positive regulation of extracellular matrix organization [GO:1903055]; positive regulation of macrophage differentiation [GO:0045651]; positive regulation of mitotic metaphase/anaphase transition [GO:0045842]; positive regulation of transcription by RNA polymerase II [GO:0045944]; positive regulation of transcription regulatory region DNA binding [GO:2000679]; protein localization to chromosome, centromeric region [GO:0071459]; Ras protein signal transduction [GO:0007265]; regulation of cell cycle [GO:0051726]; regulation of centromere complex assembly [GO:0090230]; regulation of cohesin loading [GO:0071922]; regulation of lipid kinase activity [GO:0043550]; regulation of mitotic cell cycle [GO:0007346]; regulation of transcription, DNA-templated [GO:0006355]; sister chromatid biorientation [GO:0031134]; skeletal muscle cell differentiation [GO:0035914]; spermatogenesis [GO:0007283]; striated muscle cell differentiation [GO:0051146]; tissue homeostasis [GO:0001894]
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GO - Molecular function (MF):
disordered domain specific binding [GO:0097718]; DNA-binding transcription factor binding [GO:0140297]; identical protein binding [GO:0042802]; importin-alpha family protein binding [GO:0061676]; kinase binding [GO:0019900]; phosphoprotein binding [GO:0051219]; RNA polymerase II-specific DNA-binding...
disordered domain specific binding [GO:0097718]; DNA-binding transcription factor binding [GO:0140297]; identical protein binding [GO:0042802]; importin-alpha family protein binding [GO:0061676]; kinase binding [GO:0019900]; phosphoprotein binding [GO:0051219]; RNA polymerase II-specific DNA-binding transcription factor binding [GO:0061629]; RNA polymerase II transcription regulatory region sequence-specific DNA binding [GO:0000977]; transcription corepressor activity [GO:0003714]; ubiquitin protein ligase binding [GO:0031625]
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GO - Cellular component (CC):
chromatin [GO:0000785]; chromatin lock complex [GO:0061793]; cytosol [GO:0005829]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]; PML body [GO:0016605]; Rb-E2F complex [GO:0035189]; spindle [GO:0005819]; SWI/SNF complex [GO:0016514]; transcription regulator complex [GO:0005667]...
chromatin [GO:0000785]; chromatin lock complex [GO:0061793]; cytosol [GO:0005829]; nucleoplasm [GO:0005654]; nucleus [GO:0005634]; PML body [GO:0016605]; Rb-E2F complex [GO:0035189]; spindle [GO:0005819]; SWI/SNF complex [GO:0016514]; transcription regulator complex [GO:0005667]
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