Anti Phospho-RB1 (S780) mAb (Clone 2E9)

CUSABIO

Catalog No.:
CSB-RA019386A780phHU-50
IHC image of CSB-RA019386A780phHU diluted at 1:100 and staining in paraffin-embedded human breast cancer performed on a Leica BondTM system. After dewaxing and hydration, antigen retrieval was mediated by high pressure in a citrate buffer (pH 6.0). Section was blocked with 10% normal goat serum 30min at RT. Then primary antibody (1% BSA) was incubated at 4℃ overnight. The primary is detected by a biotinylated secondary antibody and visualized using an HRP conjugated SP system.
Immunofluorescence staining of K562 cells with CSB-RA019386A780phHU at 1:100,counter-stained with DAPI. The cells were fixed in 4% formaldehyde, permeabilized using 0.2% Triton X-100 and blocked in 10% normal Goat Serum. The cells were then incubated with the antibody overnight at 4℃. The secondary antibody was Alexa Fluor 488-congugated AffiniPure Goat Anti-Rabbit IgG (H+L).
Immunoprecipitating Phospho-RB1 in Hela whole cell lysate<br /> Lane 1: Rabbit control IgG(1μg)instead of CSB-RA019386A780phHU in Hela whole cell lysate. For western blotting,a HRP-conjugated Protein G antibody was used as the secondary antibody (1/2000)<br /> Lane 2: CSB-RA019386A780phHU(3μg)+ Hela whole cell lysate(1mg)<br /> Lane 3: Hela whole cell lysate (20μg)<br />
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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. Upon calcium influx, RB1 is dephosphorylated by calcineurin, which leads to release of the repressor complex (By similarity). 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.

Product Specifications
Application IHC, IF, IP, ELISA
Reactivity Human
Clonality Monoclonal (Clone No.: 2.0E+9)

Documents & Links for Anti Phospho-RB1 (S780) mAb (Clone 2E9)
Datasheet Anti Phospho-RB1 (S780) mAb (Clone 2E9) Datasheet

Documents & Links for Anti Phospho-RB1 (S780) mAb (Clone 2E9)
Datasheet Anti Phospho-RB1 (S780) mAb (Clone 2E9) Datasheet
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