This gene encodes a nuclear protein that contains a p53 binding domain at the N-terminus and a RING finger domain at the C-terminus, and shows structural similarity to p53-binding protein MDM2. Both proteins bind the p53 tumor suppressor protein and inhibit its activity, and have been shown to be overexpressed in a variety of human cancers. However, unlike MDM2 which degrades p53, this protein inhibits p53 by binding its transcriptional activation domain. This protein also interacts with MDM2 protein via the RING finger domain, and inhibits the latter's degradation. So this protein can reverse MDM2-targeted degradation of p53, while maintaining suppression of p53 transactivation and apoptotic functions. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Feb 2011]
Catalog No
A8369
Reactivity
Human, Mouse, Rat
Applications
WB, IHC-p, IF(paraffin section), ELISA
Modification
Phospho Specific
Source
Polyclonal Rabbit
Dilution
Western Blot: 1/500 - 1/2000. Immunohistochemistry: 1/100 - 1/300. ELISA: 1/5000. Not yet tested in other applications.
Purification
The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen.
Concentration
1 mg/ml
Storage and Stability
-20°C/1 year
Other Name
MDM4; MDMX; Protein Mdm4; Double minute 4 protein; Mdm2-like p53-binding protein; Protein Mdmx; p53-binding protein Mdm4
Molecular Weight (Da)
54864
Gene Name
MDM4
Protein Name
Protein Mdm4
Human Gene ID
4194
Human Swiss Prot No.
O15151
Immunogen
The antiserum was produced against synthesized peptide derived from human MDM4 around the phosphorylation site of Ser367. AA range:336-385
Specificity
Phospho-MDMX (S367) Polyclonal Antibody detects endogenous levels of MDMX protein only when phosphorylated at S367.
Formulation
Liquid in PBS containing 50% glycerol, 0.5% BSA and 0.02% sodium azide.
Western blot analysis of lysates from HeLa cells treated with calyculinA 50ng/ml 30', using MDM4 (Phospho-Ser367) Antibody. The lane on the right is blocked with the phospho peptide.
Immunohistochemistry analysis of paraffin-embedded human colon carcinoma, using MDM4 (Phospho-Ser367) Antibody. The picture on the right is blocked with the phospho peptide.
Enzyme-Linked Immunosorbent Assay (Phospho-ELISA) for Immunogen Phosphopeptide (Phospho-left) and Non-Phosphopeptide (Phospho-right), using MDM4 (Phospho-Ser367) Antibody