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1e05

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{{STRUCTURE_1e05| PDB=1e05 | SCENE= }}
{{STRUCTURE_1e05| PDB=1e05 | SCENE= }}
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'''PLASMA ALPHA ANTITHROMBIN-III'''
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===PLASMA ALPHA ANTITHROMBIN-III===
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==Overview==
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The crystal structure of a dimeric form of intact antithrombin has been solved to 2.6 A, representing the highest-resolution structure of an active, inhibitory serpin to date. The crystals were grown under microgravity conditions on Space Shuttle mission STS-67. The overall confidence in the structure, determined earlier from lower resolution data, is increased and new insights into the structure-function relationship are gained. Clear and continuous electron density is present for the reactive centre loop region P12 to P14 inserting into the top of the A-beta-sheet. Areas of the extended amino terminus, unique to antithrombin and important in the binding of the glycosaminoglycan heparin, can now be traced further than in the earlier structures. As in the earlier studies, the crystals contain one active and one latent molecule per asymmetric unit. Better definition of the electron density surrounding the D-helix and of the residues implicated in the binding of the heparin pentasaccharide (Arg47, Lys114, Lys125, Arg129) provides an insight into the change of affinity of binding that accompanies the change in conformation. In particular, the observed hydrogen bonding of these residues to the body of the molecule in the latent form explains the mechanism for the release of newly formed antithrombin-protease complexes into the circulation for catabolic removal.
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The line below this paragraph, {{ABSTRACT_PUBMED_9067613}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 9067613 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9067613}}
==About this Structure==
==About this Structure==
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[[Category: Skinner, R.]]
[[Category: Skinner, R.]]
[[Category: Serpin]]
[[Category: Serpin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:29:40 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 23:55:01 2008''

Revision as of 20:55, 30 June 2008

Image:1e05.png

Template:STRUCTURE 1e05

PLASMA ALPHA ANTITHROMBIN-III

Template:ABSTRACT PUBMED 9067613

About this Structure

1E05 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

The 2.6 A structure of antithrombin indicates a conformational change at the heparin binding site., Skinner R, Abrahams JP, Whisstock JC, Lesk AM, Carrell RW, Wardell MR, J Mol Biol. 1997 Feb 28;266(3):601-9. PMID:9067613

Page seeded by OCA on Mon Jun 30 23:55:01 2008

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