Retinoblastoma-like protein 1
Definition:
Key regulator of entry into cell division. Directly involved in heterochromatin formation by maintaining overall chromatin structure and, in particular, that of constitutive heterochromatin by stabilizing histone methylation (By similarity). Recruits and targets histone methyltransferases KMT5B and KMT5C, leading to epigenetic transcriptional repression (By similarity). Controls histone H4 'Lys-20' trimethylation (By similarity). Probably acts as a transcription repressor by recruiting chromatin-modifying enzymes to promoters (By similarity). Potent inhibitor of E2F-mediated trans-activation. May act as a tumor suppressor.
References:
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[1]. L Zhu, et al. Inhibition of cell proliferation by p107, a relative of the retinoblastoma protein. Genes Dev. 1993 Jul;7(7A):1111-25. [Content Brief]
[2]. Fabienne Schmit, et al. LINC, a human complex that is related to pRB-containing complexes in invertebrates regulates the expression of G2/M genes. Cell Cycle. 2007 Aug 1;6(15):1903-13. [Content Brief]
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