Article (Scientific journals)
Procollagen II amino propeptide processing by ADAMTS-3. Insights on dermatosparaxis.
Fernandes, R. J.; Hirohata, S.; Engle, J. M. et al.
2001In Journal of Biological Chemistry, 276 (34), p. 31502-9
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Keywords :
ADAM Proteins; Amino Acid Sequence; Base Sequence; Blotting, Northern; Cell Line; Cloning, Molecular; DNA Primers; Ehlers-Danlos Syndrome/enzymology; Endopeptidases/chemistry/genetics/metabolism; Humans; Molecular Sequence Data; Peptide Fragments/metabolism; Procollagen/metabolism; Procollagen N-Endopeptidase/chemistry/genetics; Protein Processing, Post-Translational; Sequence Homology, Amino Acid
Abstract :
[en] The amino and carboxyl propeptides of procollagens I and II are removed by specific enzymes as a prerequisite for fibril assembly. Null mutations in procollagen I N-propeptidase (ADAMTS-2) cause dermatosparaxis in cattle and the Ehlers-Danlos syndrome (dermatosparactic type) in humans by preventing proteolytic excision of the N-propeptide of procollagen I. We have found that procollagen II is processed normally in dermatosparactic nasal cartilage, suggesting the existence of another N-propeptidase(s). We investigated such a role for ADAMTS-3 in Swarm rat chondrosarcoma RCS-LTC cells, which fail to process the procollagen II N-propeptide. Stable transfection of RCS-LTC cells with bovine ADAMTS-2 or human ADAMTS-3 partially rescued the processing defect, suggesting that ADAMTS-3 has procollagen II N-propeptidase activity. Human skin and skin fibroblasts showed 30-fold higher mRNA levels of ADAMTS-2 than ADAMTS-3, whereas ADAMTS-3 mRNA was 5-fold higher than ADAMTS-2 mRNA in human cartilage. We propose that both ADAMTS-2 and ADAMTS-3 process procollagen II, but ADAMTS-3 is physiologically more relevant, given its preferred expression in cartilage. The findings provide an explanation for the sparing of cartilage in dermatosparaxis and, perhaps, for the relative sparing of some procollagen I-containing tissues.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Fernandes, R. J.;  University of Washington, Seattle, Washington > Dpt of Biochemistry & Dpt of Orthopaedics and Sports Medicine
Hirohata, S.;  Lerner Research Institute, Cleveland Clinic Foundation, Ohio - USA > Dpt of Biomedical Engineering
Engle, J. M.;  Lerner Research Institute, Cleveland Clinic Foundation, Ohio - USA > Dpt of Biomedical Engineering
Colige, Alain ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Laboratoire de Biologie des tissus conjonctifs
Cohn, D. H.;  University of California, Los Angeles - UCLA > Dpt of Human Genetics and Pediatrics - S.Spielberg Pediatric Res Center
Eyre, D. R.
Apte, S. S.;  Lerner Research Institute, Cleveland Clinic Foundation, Ohio - USA > Dpt of Biomedical Engineering
Language :
English
Title :
Procollagen II amino propeptide processing by ADAMTS-3. Insights on dermatosparaxis.
Publication date :
2001
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, Baltimore, United States - Maryland
Volume :
276
Issue :
34
Pages :
31502-9
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 February 2010

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