NPEPPS
Function
Aminopeptidase with broad substrate specificity for several peptides. Involved in proteolytic events essential for cell growth and viability. May act as regulator of neuropeptide activity. Plays a role in the antigen-processing pathway for MHC class I molecules. Involved in the N-terminal trimming of cytotoxic T-cell epitope precursors. Digests the poly-Q peptides found in many cellular proteins. Digests tau from normal brain more efficiently than tau from Alzheimer disease brain.
Sequence Similarities
Belongs to the peptidase M1 family.
Tissue Specificity
Detected in liver, epithelium of renal tubules, epithelium of small and large intestine, gastric epithelial cells, and alveoli of the lung (at protein level).
Cellular localization
- Cytoplasm
- Cytosol
- Nucleus
Alternative names
PSA, NPEPPS, Puromycin-sensitive aminopeptidase, Cytosol alanyl aminopeptidase, AAP-S