Anti-PTEN Antibody Picoband®

Phosphatase and tensin homolog? (PTEN) is a phosphatase in humans and is encoded by the?PTEN?gene. This gene was identified as a tumor suppressor that is mutated in a large number of cancers at high frequency. The protein encoded by this gene is a phosphatidylinositol-3,4,5-trisphosphate 3-phosphatase. It contains a tensin like domain as well as a catalytic domain similar to that of the dual specificity protein tyrosine phosphatases. Unlike most of the protein tyrosine phosphatases, this protein preferentially dephosphorylates phosphoinositide substrates. It negatively regulates intracellular levels of phosphatidylinositol-3,4,5-trisphosphate in cells and functions as a tumor suppressor by negatively regulating AKT/PKB signaling pathway. The use of a non-canonical (CUG) upstream initiation site produces a longer isoform that initiates translation with a leucine, and is thought to be preferentially associated with the mitochondrial inner membrane. This longer isoform may help regulate energy metabolism in the mitochondria. A pseudogene of this gene is found on chromosome 9. Alternative splicing and the use of multiple translation start codons results in multiple transcript variants encoding different isoforms.

1. Agrawal, S., Pilarski, R., Eng, C. Different splicing defects lead to differential effects downstream of the lipid and protein phosphatase activities of PTEN. Hum. Molec. Genet. 14: 2459-2468, 2005. 2. Alimonti, A., Carracedo, A., Clohessy, J. G., Trotman, L. C., Nardella, C., Egia, A., Salmena, L., Sampieri, K., Haveman, W. J., Brogi, E., Richardson, A. L., Zhang, J., Pandolfi, P. P. Subtle variations in Pten dose determine cancer susceptibility. Nature Genet. 42: 454-458, 2010. 3. Alvarez-Breckenridge, C. A., Waite, K. A., Eng, C. PTEN regulates phospholipase D and phospholipase C. Hum. Molec. Genet. 16: 1157-1163, 2007.

At -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freezing and thawing.