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. .

Retinoblastoma-associated protein (p105-Rb) (p110-RB1) (pRb) (Rb) (pp110),RB1

P06400,P13405,P33568

5925/19645/24708

Human,Mouse,Rat

WB,IHC,ELISA

WB 1:500-2000
IHC 1:50-300
ELISA 2000-20000

Phospho-Rb (S249) Polyclonal Antibody detects endogenous levels of Rb protein only when phosphorylated at S249.

106kDa

Rabbit

The antiserum was produced against synthesized peptide derived from human Retinoblastoma around the phosphorylation site of Ser249. AA range:221-270

Polyclonal

Rabbit,IgG

The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen.

Liquid in PBS containing 50% glycerol, 0.5% BSA and 0.02% New type preservative N.

1 mg/ml

Store at -20℃. Stable for 12 months from date of receipt.