Mdm2 is a protein that in humans is encoded by the MDM2 gene. Mdm2 is an important negative regulator of the p53 tumor suppressor. Mdm2 protein functions both as an E3 ubiquitin ligase that recognizes the N-terminal trans-activation domain (TAD) of the p53 tumor suppressor and as an inhibitor of p53 transcriptional activation. The full-length transcript of the mdm2 gene encodes a protein of 491 amino acids with a predicted molecular weight of 56kDa. This protein contains several conserved structural domains including an N-terminal p53 interaction domain, the structure of which has been solved using x-ray crystallography. The Mdm2 protein also contains a central acidic domain (residues 230-300). The phosphorylation of residues within this domain appears to be important for regulation of Mdm2 function. In addition, this region contains nuclear export and import signals that are essential for proper nuclear-cytoplasmic trafficking of Mdm2. Mdm2 also contains a C-terminal RING domain (amino acid resdiues 430-480), which contains a Cis3-His2-Cis3 consensus that coordinates two molecules of zinc. These residues are required for zinc binding, which is essential for proper folding of the RING domain. The RING domain of Mdm2 confers E3 ubiquitin ligase activity and is sufficient for E3 ligase activity in Mdm2 RING autoubiquitination. The RING domain of Mdm2 is unique in that it incorporates a conserved Walker A or P-loop motif characteristic of nucleotide binding proteins, as well as a nucleolar localization sequence.
MDM2 Polyclonal Antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen. This antibody has been tested with WB, IHC-p and ELISA. And Abbkine suggested starting dilutions are as follows: WB: 1:500-1:2000, IHC-p: 1:100-300 ELISA: 1:20000.
To investigate the murine double minute 2 (MDM2) localization and expression pattern in brain, immunohistochemistry, immunofluorescent staining and immunoblotting methods were used to analyze it in brains of Kunming mice during postnatal devel-opment, in brains of adult SD rats and in primarily cultured neurons. I extracted the protein samples of cerebral cortex, and used MDM2 Polyclonal Antibody to detect the expression of MDM2 protein in different developmental stages. I was impressed by the results. It’s wonderful!