2ayk

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[[Image:2ayk.gif|left|200px]]
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{{STRUCTURE_2ayk| PDB=2ayk | SCENE= }}
{{STRUCTURE_2ayk| PDB=2ayk | SCENE= }}
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'''INHIBITOR-FREE CATALYTIC FRAGMENT OF HUMAN FIBROBLAST COLLAGENASE, NMR, MINIMIZED AVERAGE STRUCTURE'''
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===INHIBITOR-FREE CATALYTIC FRAGMENT OF HUMAN FIBROBLAST COLLAGENASE, NMR, MINIMIZED AVERAGE STRUCTURE===
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==Overview==
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The high-resolution solution structure of the inhibitor-free catalytic fragment of human fibroblast collagenase (MMP-1), a protein of 18.7 kDa, which is a member of the matrix metalloproteinase family, has been determined using three-dimensional heteronuclear NMR spectroscopy. A total of 30 structures were calculated by means of hybrid distance geometry-simulated annealing using a total of 3333 experimental NMR restraints, consisting of 2409 approximate interproton distance restraints, 84 distance restraints for 42 backbone hydrogen bonds, 426 torsion angle restraints, 125 3JNH alpha restraints, 153 C alpha restraints, and 136 C beta restraints. The atomic rms distribution about the mean coordinate positions for the 30 structures for residues 7-137 and 145-163 is 0.42 +/- 0.04 A for the backbone atoms, 0.80 +/- 0.04 A for all atoms, and 0.50 +/- 0.03 A for all atoms excluding disordered side chains. The overall structure of MMP-1 is composed of a beta-sheet consisting of five beta-strands in a mixed parallel and anti-parallel arrangement and three alpha-helices. A best-fit superposition of the NMR structure of inhibitor-free MMP-1 with the 1.56 A resolution X-ray structure by Spurlino et al. [Spurlino, J. C., Smallwood, A. M., Carlton, D. D., Banks, T. M., Vavra, K. J., Johnson, J. S., Cook, E. R., Falvo, J., and Wahl, R. C., et al. (1994) Proteins: Struct., Funct., Genet. 19, 98-109] complexed with a hydroxamate inhibitor yields a backbone atomic rms difference of 1.22 A. The majority of differences between the NMR and X-ray structure occur in the vicinity of the active site for MMP-1. This includes an increase in mobility for residues 138-144 and a displacement for the Ca(2+)-loop (residues 74-80). Distinct differences were observed for side-chain torsion angles, in particular, the chi 1 for N80 is -60 degrees in the NMR structure compared to 180 degrees in the X-ray. This results in the side chain of N80 occupying and partially blocking access to the active site of MMP-1.
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(as it appears on PubMed at http://www.pubmed.gov), where 9484219 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9484219}}
==About this Structure==
==About this Structure==
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2AYK is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AYK OCA].
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2AYK is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AYK OCA].
==Reference==
==Reference==
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[[Category: Matrix metalloproteinase]]
[[Category: Matrix metalloproteinase]]
[[Category: Metalloprotease]]
[[Category: Metalloprotease]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:37:46 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 21:47:50 2008''

Revision as of 18:47, 27 July 2008

Image:2ayk.png

Template:STRUCTURE 2ayk

INHIBITOR-FREE CATALYTIC FRAGMENT OF HUMAN FIBROBLAST COLLAGENASE, NMR, MINIMIZED AVERAGE STRUCTURE

Template:ABSTRACT PUBMED 9484219

About this Structure

2AYK is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

High-resolution solution structure of the inhibitor-free catalytic fragment of human fibroblast collagenase determined by multidimensional NMR., Moy FJ, Chanda PK, Cosmi S, Pisano MR, Urbano C, Wilhelm J, Powers R, Biochemistry. 1998 Feb 10;37(6):1495-504. PMID:9484219

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