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J. Biol. Chem., Vol. 277, Issue 8, 5756-5766, February 22, 2002
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§§
From the The processing of amino- and carboxyl-propeptides
of fibrillar collagens is required to generate collagen monomers that
correctly assemble into fibrils. Mutations in the ADAMTS2
gene, the aminopropeptidase of procollagen I and II, result in the
accumulation of non-fully processed type I procollagen, causing human
Ehlers-Danlos syndrome type VIIC and animal dermatosparaxis. In this
study, we show that the aminopropeptide of type I procollagen can be
cleaved in vivo in absence of ADAMTS-2 activity and that
this processing is performed at the cleavage site for ADAMTS-2. In an
attempt to identify the enzyme responsible for this alternative
aminoprocollagen peptidase activity, we have cloned the cDNA and
determined the primary structure of human and mouse ADAMTS-14, a novel
ADAMTS displaying striking homologies with ADAMTS-2 and -3. The
structure of the human gene, which maps to 10q21.3, and the mechanisms
of generation of the various transcripts are described. The existence
of two sites of initiation of transcription, in two different promoter
contexts, suggests that transcripts resulting from these two sites can
be differently regulated. The tissue distribution of ADAMTS-14, the regulation of the gene expression by various cytokines and the activity
of the recombinant enzyme are evaluated. The potential function of
ADAMTS-14 as a physiological aminoprocollagen peptidase in
vivo is discussed.
Laboratory of Connective Tissues Biology,
Experimental Cancerology Research Center, Tour de Pathologie (B23/3),
University of Liège, B-4000 Liège, Belgium, the
¶ Laboratory of Protein Biochemistry and Protein Engineering,
University of Gent, K. L. Ledeganckstraat 35, 9000 Gent, Belgium,
the
Laboratoire de Biologie cellulaire et tissulaire, University
of Liège, 4020 Liège, Belgium, and the

Center for Gene Therapy, Tulane University
Health Sciences Center, New Orleans, Louisiana 70112
The nucleotide sequence(s) reported in this paper has been submitted to the GenBankTM/EBI Data Bank with accession number(s) AF366351.
§ Research associate of the Belgian Fonds National de la Recherche Scientifique and supported by Belgian National Fonds National de la Recherche Scientifique Grant 1.5.131.01 and the Fonds Special pour la Recherche Grant 1165003. ** Research associate of the Belgian Fonds National de la Recherche Scientifique. §§ To whom correspondence should be addressed: Laboratory of Connective Tissues Biology, Tour de Pathologie (B23/3), University of Liège, B-4000 Liège, Belgium. Tel.: 32-4-3662456; Fax: 32-4-3662457; E-mail: LCTB@ulg.ac.be.This article has been cited by other articles:
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