Anti-Pcsk1n (N-terminal) antibody produced in rabbit affinity isolated antibody

Pcsk1n may function in the control of the neuroendocrine secretory pathway. It is proposed to be a specific endogenous inhibitor of PCSK1. ProSAAS and Big PEN-LEN, both containing the C-terminal inhibitory domain, but not the processed peptides reduce PCSK1 activity in the endoplasmic reticulum and Golgi. It reduces the activity of the 87 kDa form but not the autocatalytically derived 65 kDa form of PCSK1. Subsequent processing of proSAAS may eliminate the inhibition. Slows down convertase-mediated processing of proopiomelanocortin and proenkephalin. Pcsk1n may control the intracellular timing of PCSK1 rather than its total level of activity.