RB1 Monoclonal antibody

RB1 Monoclonal Antibody for IHC, WB,ELISA

Host / Isotype

Mouse / IgG2a

Reactivity

Human

Applications

WB, IHC,ELISA

Conjugate

Unconjugated

CloneNo.

1A2A6

Cat no : 67521-1-Ig

Synonyms

OSRC, p105 Rb, pp110, pRb, RB, RB1, retinoblastoma 1



Tested Applications

Positive WB detected inJurkat cells, HL-60 cells, K-562 cells, MCF-7 cells, TF-1 cells
Positive IHC detected inInsulinoma tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0

Recommended dilution

ApplicationDilution
Western Blot (WB)WB : 1:1000-1:6000
Immunohistochemistry (IHC)IHC : 1:500-1:2000
Sample-dependent, check data in validation data gallery

Product Information

67521-1-Ig targets RB1 in WB, IHC,ELISA applications and shows reactivity with Human samples.

Tested Reactivity Human
Host / Isotype Mouse / IgG2a
Class Monoclonal
Type Antibody
Immunogen RB1 fusion protein Ag22578
Full Name retinoblastoma 1
Calculated molecular weight 928 aa, 106 kDa
Observed molecular weight 110 kDa
GenBank accession numberBC039060
Gene symbol RB1
Gene ID (NCBI) 5925
Conjugate Unconjugated
Form Liquid
Purification Method Protein A purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Aliquoting is unnecessary for -20oC storage.

Background Information

RB1, also named as pp110, pRb and p105 Rb, belongs to the retinoblastoma protein (RB) family. It is a key regulator of entry into cell division that acts as a tumor suppressor. RB1 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. It is directly involved in heterochromatin formation by maintaining overall chromatin structure and, in particular, that of constitutive heterochromatin by stabilizing histone methylation. It recruits and targets histone methyltransferases SUV39H1, SUV420H1 and SUV420H2, leading to epigenetic transcriptional repression. RB1 controls histone H4 'Lys-20' trimethylation and inhibits the intrinsic kinase activity of TAF1. It 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. 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.

Protocols

Product Specific Protocols
WB protocol for RB1 antibody 67521-1-IgDownload protocol
IHC protocol for RB1 antibody 67521-1-IgDownload protocol
Standard Protocols
Click here to view our Standard Protocols