RB1 — RB transcriptional corepressor 1
RB1 belongs to a gene co-expression module in 3 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
RB1's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| Endothelial | Inflammatory Lipid Metabolism Metabolite transfer | ACSL4, APOL1, CDK2AP2, COPS8, GBE1, GOLM1, MAPRE1, NPC1 +5 more | View in SCUBA |
| Gamma-delta T cells | Transcriptional Repressor Complex DNA/chromatin regulation | BAG1, CAB39, CLEC2B, EBP, FBXO31, GFI1, MAN1A1, MAP2K1 +14 more | |
| Macrophages | Efferocytosis Anti-inflammatory Lysosomal & pahgocytosis | ABHD12, ADGRG5, AIG1, AXL, CCS, CD101, CD1D, CD300A +18 more | View in SCUBA |
About the gene
| Synonyms | OSRC, PPP1R130, RB |
|---|---|
| Chromosome | 13: 48303744-48599436 |
| Predicted location | Intracellular |
| Essential gene | No |
| Protein class | Cancer-related genes, Disease related genes, Human disease related genes, Plasma proteins, Predicted intracellular proteins |
| Molecular function | Chromatin regulator, DNA-binding, Repressor |
| Biological process | Cell cycle, Host-virus interaction, Transcription, Transcription regulation |
Function
Tumor suppressor that is a key regulator of the G1/S transition of the cell cycle. The hypophosphorylated form binds transcription regulators of the E2F family, preventing transcription of E2F-responsive genes. Both physically blocks E2Fs transactivating domain and recruits chromatin- modifying enzymes that actively repress transcription. 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. RB1 also promotes the G0-G1 transition upon phosphorylation and activation by CDK3/cyclin-C. 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). (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.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.