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Tchem
RB1
Retinoblastoma-associated protein

Protein Summary
Description
Key regulator of entry into cell division that acts as a tumor suppressor. Promotes G0-G1 transition when phosphorylated by CDK3/cyclin-C. Acts as a transcription repressor of E2F1 target genes. The underphosphorylated, active form of RB1 interacts with E2F1 and represses its transcription activity, leading to cell cycle arrest. 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. Up ...more
Uniprot Accession IDs
Gene Name
Ensembl ID
  • ENST00000267163
  • ENSP00000267163
  • ENSG00000139687

Symbol
  • RB
  • pRb
  • OSRC
  • pp110
  • p105-Rb
  • PPP1R130
Illumination Graph
Knowledge Table
Most Knowledge About
Knowledge Value (0 to 1 scale)
biological process
1
biological term
1
chemical
1
hub protein
1
kinase
1


IDG Development Level Summary
Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 1741.88   (req: < 5)
Gene RIFs: 824   (req: <= 3)
Antibodies: 3155   (req: <= 50)
Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 1741.88   (req: >= 5)
Gene RIFs: 824   (req: > 3)
Antibodies: 3155   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 66
Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligands: 4
Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0