IUBMB Enzyme Nomenclature


Accepted name: stratum corneum chymotryptic enzyme

Reaction: Cleavage of proteins with aromatic side chains in the P1 position

Other name(s): kallikrein 7; SCCE; KLK7; PRSS6; hK7

Comments: This enzyme has wide substrate specificity, being able to degrade heat-denatured bovine casein and the α-chain of native human fibrinogen. It cleaves the B chain of bovine insulin at Leu6Cya7, Tyr16Leu17, Phe25Tyr26 and Tyr26Thr27 [1]. It is thought to play a role in the desquamation (skin-shedding) of the outer layer of skin, the stratum corneum, by degrading intercellular cohesive structures [1,2]. Belongs in peptidase family S1A.

Links to other databases: BRENDA, EXPASY, KEGG, MEROPS, Metacyc, PDB, CAS registry number: 155215-90-0


1. Skytt, A., Strömqvist, M. and Egelrud, T. Primary substrate specificity of recombinant human stratum corneum chymotryptic enzyme. Biochem. Biophys. Res. Commun. 211 (1995) 586-589. [PMID: 7794273]

2. Egelrud, T. Purification and preliminary characterization of stratum corneum chymotryptic enzyme: a proteinase that may be involved in desquamation. J. Invest. Dermatol. 101 (1993) 200-204. [PMID: 8393902]

3. Hansson, L., Strömqvist, M., Bäckman, A., Wallbrandt, P., Carlstein, A. and Egelrud, T. Cloning, expression, and characterization of stratum corneum chymotryptic enzyme. A skin-specific human serine proteinase. J. Biol. Chem. 269 (1994) 19420-19426. [PMID: 8034709]

4. Yousef, G.M., Scorilas, A., Magklara, A., Soosaipillai, A. and Diamandis, E.P. The KLK7 (PRSS6) gene, encoding for the stratum corneum chymotryptic enzyme is a new member of the human kallikrein gene family - genomic characterization, mapping, tissue expression and hormonal regulation. Gene 254 (2000) 119-128. [PMID: 10974542]

5. Vasilopoulos, Y., Cork, M.J., Murphy, R., Williams, H.C., Robinson, D.A., Duff, G.W., Ward, S.J. and Tazi-Ahnini, R. Genetic association between an AACC insertion in the 3'UTR of the stratum corneum chymotryptic enzyme gene and atopic dermatitis. J. Invest. Dermatol. 123 (2004) 62-66. [PMID: 15191543]

[EC created 2006]

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