RB is also a general tumor suppressor, which is associated with a central N (A/B) and C-terminal (pocket domains, which are binding sites for RB) that were defined to have the ability to bind cellular and viral proteins that affect the cell division cycle. Mutations in the pocket domain region are often tumorigenic. These pocket domains are also present in homologues structures of RB that exhibit similar protein binding and functional characteristics pertaining to the cell division cycle. Ev

E2F (receptor for dependent transcription) is used to determine the interactions between it and another protein. In a NR interaction RB is allowed to release from E2F allowing progression into the S-phase. In a GR interaction, the repression of E2F activity and cell growth requires another pocket domain, hBRM (binding protein). This binding protein is part of a multisubunit human SWI/SNF complexes (Proteins that function in the reorganization of chromatin structure and influence the activity of proteins by affecting their access to regulatory sites). Mutations that occur in the E2F binding site causes the site to render activity with RB. (Puga et. Al, 2000)

Both of these receptors have an N-terminal A/B region, which contains the activity activation function that activates transcription constitutively. They also include a C-terminal that contains the ligand-binding domain (LBD). In Ligand-dependent gene expression mediated by NRs involves the displacement of co repressors and subsequent conscription of transcriptional coactivators to the LBD. These coactivators modify local chromatic structure by acetylating histone, which directly assembles the transcription-commencing complex. In a ligand-dependent gene expression mediated by GRs, it binds as a homodimer to t

Some topics in this essay:
A/B C-terminal, LBD Ligand-dependent, RB AHR, AHR RB, , S-phase GR, GR AHR, N-terminal A/B, NR GR-, S-phase Chan, et al, al 2001, et al 2001, cell cycle, et al 2000, puga et, puga et al, al 2000, chan et, cycle progression, rb critical, singh et al, singh et, cell division cycle, division cycle,