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Western blot(SDS PAGE) analysis of extracts from (1) Jurkat cell lysate; (2) MCF-7 cell lysate.Using Retinoblastoma Rabbit mAb [m2t6]at dilution of 1:1000 incubated at 4℃ over night.
Protein names :OSRC; RB; p105-Rb; RB1; pRb; pp110;
UniProtID :P06400
MASS(da) :106,159
MW(kDa) :105kDa
Form :Liquid
Purification :Affinity-chromatography
Host :Rabbit
Isotype : IgG
sensitivity :Endogenous
Reactivity :Human Mouse
Specificity :Antibody is produced by immunizing animals with A synthesized peptide derived from human Retinoblastoma
Storage :Antibody store in 10 mM PBS, 0.5mg/ml BSA, 50% glycerol. Shipped at 4°C. Store at-20°C or -80°C. Products are valid for one natural year of receipt.Avoid repeated freeze / thaw cycles.
WB Positive detected :(1) Jurkat cell lysate; (2) MCF-7 cell lysate.
Function : Tumor suppressor that is a key regulator of the G1/S transition of the cell cycle (PubMed:10499802). The hypophosphorylated form binds transcription regulators of the E2F family, preventing transcription of E2F-responsive genes (PubMed:10499802). Both physically blocks E2Fs transactivating domain and recruits chromatin-modifying enzymes that actively repress transcription (PubMed:10499802). 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 (PubMed:10499802). RB1 also promotes the G0-G1 transition upon phosphorylation and activation by CDK3/cyclin-C (PubMed:15084261). 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..
Tissue specificity :Expressed in the retina. Expressed in foreskin keratinocytes (at protein level) (PubMed:20940255)..
Subcellular locationi :Nucleus.
IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 1% w/v BSA, 1X TBST at 4°C overnight.