IUBMB Enzyme Nomenclature


Accepted name: proprotein convertase 2

Reaction: Release of protein hormones and neuropeptides from their precursors, generally by hydrolysis of -Lys-Arg bonds

Other names: neuroendocrine convertase 2; PC2

Comments: A Ca2+-dependent enzyme, maximally active at about pH 5.5. Specificity is broader than that of prohormone convertase 1. Substrates include pro-opiomelanocortin, proenkephalin, prodynorphin, proglucagon, proinsulin and proluteinizing-hormone-releasing-hormone. Does not hydrolyse prorenin or prosomatostatin, however. Unusually, processing of prodynorphin occurs at a bond in which P2 is Thr. Present in the regulated secretory pathway of neuroendocrine cells, commonly acting co-operatively with prohormone convertase 1. In peptidase family S8 (subtilisin family)

Links to other databases: BRENDA, EXPASY, KEGG, MEROPS, Metacyc, CAS registry number: 388092-42-0


1. Seidah, N.G., Gaspar, L., Mion, P., Marcinkiewicz, M., Mbikay, M. and Chrétien, M. cDNA sequence of two distinct pituitary proteins homologous to Kex2 and furin gene products: tissue- specific mRNAs encoding candidates for pro-hormone processing proteinases. DNA Cell Biol. 9 (1990) 415-424. [PMID: 2169760]

2. Smeekens, S.P. and Steiner, D.F. Identification of a human insulinoma cDNA encoding a novel mammalian protein structurally related to the yeast dibasic processing protease Kex2. J. Biol. Chem. 265 (1990) 2997-3000 [PMID: 2154467]

3. Rouillé, Y., Westermark, G., Martin, S.K. and Steiner, D.F. Proglucagon is processed to glucagon by prohormone convertase PC2 in αTC1-6 cells. Proc. Natl. Acad. Sci. USA 91 (1994) 3242-3246. [PMID: 8159732]

4. Seidah, N.G. and Chrétien, M. Pro-protein convertases of the subtilisin/kexin family. Methods Enzymol. 244 (1994) 175-188 [PMID: 7845206]

[EC created 1996]

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