Cloning and characterization of human MMP-23, a new matrix metalloproteinase predominantly expressed in reproductive tissues and lacking conserved domains in other family members

Velasco, Gloria, Pendás, Alberto M., Fueyo, Antonio, Knäuper, Vera, Murphy, Gillian and López-Otı́n, Carlos 1999. Cloning and characterization of human MMP-23, a new matrix metalloproteinase predominantly expressed in reproductive tissues and lacking conserved domains in other family members. Journal of Biological Chemistry 274 (8) , pp. 4570-4576. 10.1074/jbc.274.8.4570

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Abstract

A cDNA encoding a new human matrix metalloproteinase (MMP), tentatively called MMP-23, has been cloned from an ovary cDNA library. This protein exhibits sequence similarity with MMPs, but displays a different domain structure. Thus, MMP-23 lacks a recognizable signal sequence and has a short prodomain, although it contains a single cysteine residue that can be part of the cysteine-switch mechanism operating for maintaining enzyme latency. The C-terminal domain is considerably shortened and shows no sequence similarity to hemopexin, whereas all human MMPs, with the exception of matrilysin, contain four hemopexin-like repeats. Furthermore, MMP-23 is devoid of structural features distinctive of the diverse MMP subclasses, including the specific residues located close to the zinc-binding site in collagenases, the transmembrane domain of membrane-type MMPs, or the fibronectin-like domain of gelatinases. Fluorescent in situ hybridization experiments showed that the human MMP-23 gene maps to 1p36, a location which differs from all MMP genes mapped to date. Recombinant MMP-23 produced inEscherichia coli exhibits low, but significant proteolytic activity against a synthetic substrate commonly used for assaying MMPs. Northern blot analysis demonstrated that MMP-23 is predominantly expressed in ovary, testis, and prostate, suggesting that this new MMP may play a specialized role in reproductive

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Dentistry
Publisher:	Elsevier
ISSN:	0021-9258
Last Modified:	14 Sep 2023 14:30
URI:	https://orca.cardiff.ac.uk/id/eprint/161649

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