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1knt

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{{STRUCTURE_1knt| PDB=1knt | SCENE= }}
{{STRUCTURE_1knt| PDB=1knt | SCENE= }}
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'''THE 1.6 ANGSTROMS STRUCTURE OF THE KUNITZ-TYPE DOMAIN FROM THE ALPHA3 CHAIN OF THE HUMAN TYPE VI COLLAGEN'''
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===THE 1.6 ANGSTROMS STRUCTURE OF THE KUNITZ-TYPE DOMAIN FROM THE ALPHA3 CHAIN OF THE HUMAN TYPE VI COLLAGEN===
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==Overview==
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The C-terminal Kunitz-type domain from the alpha 3 chain of human type VI collagen (C5), a single 58 amino acid residue chain with three disulfide bridges, was cloned, expressed and crystallized in a monoclonic form, space group P2(1), with a = 25.7 A, b = 38.2 A, c = 28.8 A and beta = 109 degrees. The structure was resolved by molecular replacement, using Alzheimer's protein precursor inhibitor and bovine pancreatic trypsin inhibitor three-dimensional structures as search models. The molecule with one sulfate ion and 43 associated water molecules was refined by XPLOR to an R-factor of 18.9% at 1.6 A. The molecule was not degraded by trypsin and did not inhibit trypsin or tested serine proteases. As opposed to the other Kunitz family members, C5 demonstrates left-handed chirality of the Cys14-Cys38 disulfide bond. Inversion of the Thr13 carbonyl and bulky side-chains at the interface with trypsin in a model of the C5-trypsin complex may explain the lack of inhibition of trypsin.
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{{ABSTRACT_PUBMED_7533217}}
==About this Structure==
==About this Structure==
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[[Category: Saludjian, P.]]
[[Category: Saludjian, P.]]
[[Category: Collagen type vi fragment]]
[[Category: Collagen type vi fragment]]
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Revision as of 07:36, 2 July 2008

Image:1knt.png

Template:STRUCTURE 1knt

THE 1.6 ANGSTROMS STRUCTURE OF THE KUNITZ-TYPE DOMAIN FROM THE ALPHA3 CHAIN OF THE HUMAN TYPE VI COLLAGEN

Template:ABSTRACT PUBMED 7533217

About this Structure

1KNT is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

The 1.6 A structure of Kunitz-type domain from the alpha 3 chain of human type VI collagen., Arnoux B, Merigeau K, Saludjian P, Norris F, Norris K, Bjorn S, Olsen O, Petersen L, Ducruix A, J Mol Biol. 1995 Mar 10;246(5):609-17. PMID:7533217

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