PSMA3 Antibody

2456:

Western Blotting

PSMA3 Antibody detects endogenous levels of total PSMA3 protein.

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Val228 of human PSMA3 protein. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western blot analysis of extracts from various cell lines using PMSA3 Antibody.

The 20S proteasome is the major proteolytic enzyme complex involved in intracellular protein degradation. It consists of four stacked rings, each with 7 distinct subunits. The two outer layers are identical rings composed of α subunits (called PSMAs), and the two inner layers are identical rings composed of β subunits. While the catalytic sites are located on the β rings (1-3), the α subunits are important for assembly and as binding sites for regulatory proteins (4). Seven different α and ten different β proteasome genes have been identified in mammals (5).PA700, PA28 and PA200 are three major protein complexes that function as activators of the 20S proteasome. PA700 binds polyubiquitin with high affinity and associates with the 20S proteasome to form the 26S proteasome which preferentially degrades poly-ubiquitinylated proteins (1-3). The proteasome has a broad substrate spectrum which includes cell cycle regulators, signaling molecules, tumor suppressors and transcription factors. By controlling the degradation of these intracellular proteins, the proteasome functions in cell cycle regulation, cancer development, immune response, protein folding and disease progression (6-9).

1. Dahlmann, B. (2005) Essays Biochem. 41, 31-48.
2. Pickart, C.M. and Cohen, R.E. (2004) Nat. Rev. Mol. Cell Biol. 5, 177-187.
3. Nandi, D. et al. (2006) J. Biosci. 31, 137-155.
4. Lupas, A. et al. (1993) Enzyme Protein 47, 252-273.
5. Monaco, J.J. and Nandi, D. (1995) Annu. Rev. Genet. 29, 729-754.
6. Murray, A.W. (2004) Cell 116, 221-234.
7. Ciechanover, A. (2006) Proc. Am. Thorac. Soc. 3, 21-31.
8. Wang, J. and Maldonado, M.A. (2006) Cell. Mol. Immunol. 3, 255-261.
9. Rubinsztein, D.C. (2006) Nature 443, 780-786.

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For Research Use Only. Not For Use In Diagnostic Procedures.