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1iag

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[[Image:1iag.gif|left|200px]]
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{{STRUCTURE_1iag| PDB=1iag | SCENE= }}
{{STRUCTURE_1iag| PDB=1iag | SCENE= }}
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'''FIRST STRUCTURE OF A SNAKE VENOM METALLOPROTEINASE: A PROTOTYPE FOR MATRIX METALLOPROTEINASES(SLASH)COLLAGENASES'''
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===FIRST STRUCTURE OF A SNAKE VENOM METALLOPROTEINASE: A PROTOTYPE FOR MATRIX METALLOPROTEINASES(SLASH)COLLAGENASES===
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==Overview==
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Adamalysin II, a 24 kDa zinc endopeptidase from the snake venom of Crotalus adamanteus, is a member of a large family of metalloproteinases isolated as small proteinases or proteolytic domains of mosaic haemorrhagic proteins from various snake venoms. Homologous domains have recently been detected in multimodular mammalian reproductive tract proteins. The 2.0 A crystal structure of adamalysin II reveals an ellipsoidal molecule with a shallow active-site cleft separating a relatively irregularly folded subdomain from the calcium-binding main molecular body composed of a five-stranded beta-sheet and four alpha-helices. The folding of the peptide fragment containing the zinc-binding motif HExxHxxGxxH bears only a distant resemblance to thermolysin, but is identical to that found in astacin, with the three histidines and a water molecule (linked to the glutamic acid) likewise constituting the zinc ligand; adamalysin II lacks a fifth (tyrosine) zinc ligand, however, leaving its zinc ion tetrahedrally co-ordinated. Furthermore, adamalysin II and astacin share an identical active-site basement formed by a common Metturn. Due to their virtually identical active-site environment and similar folding topology, the snake venom metalloproteinases (hitherto called adamalysins) and the astacins (and presumably also the matrix metalloproteinases/mammalian collagenases and the Serratia proteinase-like large bacterial proteinases) might be grouped into a common superfamily with distinct differences from the thermolysin family.
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(as it appears on PubMed at http://www.pubmed.gov), where 8223430 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8223430}}
==About this Structure==
==About this Structure==
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[[Category: Gomis-Rueth, F X.]]
[[Category: Gomis-Rueth, F X.]]
[[Category: Metalloprotease]]
[[Category: Metalloprotease]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:46:17 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 10:40:03 2008''

Revision as of 07:40, 1 July 2008

Image:1iag.png

Template:STRUCTURE 1iag

FIRST STRUCTURE OF A SNAKE VENOM METALLOPROTEINASE: A PROTOTYPE FOR MATRIX METALLOPROTEINASES(SLASH)COLLAGENASES

Template:ABSTRACT PUBMED 8223430

About this Structure

1IAG is a Single protein structure of sequence from Crotalus adamanteus. Full crystallographic information is available from OCA.

Reference

First structure of a snake venom metalloproteinase: a prototype for matrix metalloproteinases/collagenases., Gomis-Ruth FX, Kress LF, Bode W, EMBO J. 1993 Nov;12(11):4151-7. PMID:8223430

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