Anti-NPEPPS Antibody Picoband®

Puromycin-sensitive amino peptidase also known as cytosol alanyl aminopeptidase or alanine aminopeptidase (AAP) is an enzyme that in humans is encoded by the NPEPPS gene. This gene encodes the puromycin-sensitive aminopeptidase, a zinc metallopeptidase which hydrolyzes amino acids from the N-terminus of its substrate. The protein has been localized to both the cytoplasm and to cellular membranes. This enzyme degrades enkaphalins in the brain, and studies in mouse suggest that it is involved in proteolytic events regulating the cell cycle.

Expressed in some primary breast carcinomas where its presence is significantly associated with increased tumor size. Not detected in normal breast tissue.

Acts as a negative regulator of SRC by activating CSK which inhibits SRC activity and downstream signaling, leading to impaired cell spreading and migration. Regulates dendritic spine morphology. Involved in calcium-dependent exocytosis. May play a role in neurotransmitter release or synapse maintenance.

1. Bauer, W. O., Nanda, I., Beck, G., Schmid, M., Jakob, F. Human puromycin-sensitive aminopeptidase: cloning of 3-prime UTR, evidence for a polymorphism at aa 140 and refined chromosomal localization to 17q21. Cytogenet. Cell Genet. 92: 221-224, 2001. 2. Huber, G., Thompson, A., Gruninger, F., Mechler, H., Hochstrasser, R., Hauri, H.-P., Malherbe, P. cDNA cloning and molecular characterization of human brain metalloprotease MP100: a beta-secretase candidate? J. Neurochem. 72: 1215-1223, 1999. 3. Karsten, S. L., Sang, T.-K., Gehman, L. T., Chatterjee, S., Liu, J., Lawless, G. M., Sengupta, S., Berry, R. W., Pomakian, J., Oh, H. S., Schulz, C., Hui, K.-S., Wiedau-Pazos, M., Vinters, H. V., Binder, L. I., Geschwind, D. H., Jackson, G. R. A genomic screen for modifiers of tauopathy identified puromycin-sensitive aminopeptidase as an inhibitor of tau-induced neurodegeneration. Neuron 51: 549-560, 2006.

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.