title: Substrate specificity of human collagenase 3 assessed using a phage-displayed peptide library.
abstract: The substrate specificity of human collagenase 3 (MMP-13), a member of the matrix metalloproteinase family, is investigated using a phage-displayed random hexapeptide library containing 2 x 10(8) independent recombinants. A total of 35 phage clones that express a peptide sequence that can be hydrolyzed by the recombinant catalytic domain of human collagenase 3 are identified. The translated DNA sequence of these clones reveals highly conserved putative P1, P2, P3 and P1', P2', and P3' subsites of the peptide substrates. Kinetic analysis of synthetic peptide substrates made from human collagenase 3 selected phage clones reveals that some of the substrates are highly active and selective. The most active substrate, 2, 4-dinitrophenyl-GPLGMRGL-NH(2) (CP), has a k(cat)/K(m) value of 4.22 x 10(6) m(-)(1) s(-)(1) for hydrolysis by collagenase 3. CP was synthesized as a consensus sequence deduced from the preferred subsites of the aligned 35 phage clones. Peptide substrate CP is 1300-, 11-, and 820-fold selective for human collagenase 3 over the MMPs stromelysin-1, gelatinase B, and collagenase 1, respectively. In addition, cleavage of CP is 37-fold faster than peptide NF derived from the major MMP-processing site in aggrecan. Phage display screening also selected five substrate sequences that share sequence homology with a major MMP cleavage sequence in aggrecan and seven substrate sequences that share sequence homology with the primary collagenase cleavage site of human type II collagen. In addition, putative cleavage sites similar to the consensus sequence are found in human type IV collagen. These findings support previous observations that human collagenase 3 can degrade aggrecan, type II and type IV collagens.
authors.affiliation: Departments of Molecular Sciences, Molecular Biochemistry, Structural Chemistry, and Genomic Sciences, Glaxo Wellcome Research and Development, Research Triangle Park, North Carolina 27709, USA. sjd20506@glaxowellcome.com
authors.forename: S J
authors.initials: SJ
authors.lastname: Deng
authors.forename: D M
authors.initials: DM
authors.lastname: Bickett
authors.forename: J L
authors.initials: JL
authors.lastname: Mitchell
authors.forename: M H
authors.initials: MH
authors.lastname: Lambert
authors.forename: R K
authors.initials: RK
authors.lastname: Blackburn
authors.forename: H L
authors.initials: HL
authors.lastname: Carter
authors.forename: J
authors.initials: J
authors.lastname: Neugebauer
authors.forename: G
authors.initials: G
authors.lastname: Pahel
authors.forename: M P
authors.initials: MP
authors.lastname: Weiner
authors.forename: M L
authors.initials: ML
authors.lastname: Moss
mesh_terms: D015153:Blotting, Western; D020134:Catalytic Domain; D003094:Collagen / Q000378:metabolism; D017364:Collagenases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D004247:DNA / Q000235:genetics; D016208:Databases, Factual; D006801:Humans; D007700:Kinetics; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism; D053509:Matrix Metalloproteinase 13; D019278:Matrix Metalloproteinase 3 / Q000378:metabolism; D016297:Mutagenesis, Site-Directed; D019151:Peptide Library; D010455:Peptides / Q000138:chemical synthesis / Q000378:metabolism; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D017422:Sequence Analysis, DNA; D013379:Substrate Specificity; D016212:Transforming Growth Factor beta / Q000378:metabolism; D053782:Transforming Growth Factor beta3
chemical_list: D019151:Peptide Library; D010455:Peptides; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; D053782:Transforming Growth Factor beta3; D003094:Collagen; D004247:DNA; D017364:Collagenases; C507079:MMP13 protein, human; D053509:Matrix Metalloproteinase 13; D019278:Matrix Metalloproteinase 3; D020781:Matrix Metalloproteinase 1