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1ucy

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{{STRUCTURE_1ucy| PDB=1ucy | SCENE= }}
{{STRUCTURE_1ucy| PDB=1ucy | SCENE= }}
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'''THROMBIN COMPLEXED WITH FIBRINOPEPTIDE A ALPHA (RESIDUES 7-19). THREE COMPLEXES, ONE WITH EPSILON-THROMBIN AND TWO WITH ALPHA-THROMBIN'''
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===THROMBIN COMPLEXED WITH FIBRINOPEPTIDE A ALPHA (RESIDUES 7-19). THREE COMPLEXES, ONE WITH EPSILON-THROMBIN AND TWO WITH ALPHA-THROMBIN===
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==Overview==
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The crystal structure of the noncovalent complex of bovine thrombin and a fibrinogen-A alpha tridecapeptide substrate analog, G17 psi, in which the scissile bond amide nitrogen of Gly-17f has been replaced by a methylene carbon, has been determined at 2.3 A resolution with an R factor of 17.1%. The geometry of the active site indicates that the crystal structure is a close model of the true Michaelis complex. The three independently determined thrombin/G17 psi complexes in the crystal asymmetric unit reveal novel interactions for the P2' and P3' residues-Pro-18f and Arg-19f, respectively-on the carboxyl-terminal side of the scissile bond and confirm previously observed interactions of the P1 (Arg-16f) through P10 (Asp-7f) positions on the amino-terminal side. The thrombin S2' binding site for Pro-18f, as observed in all three complexes, differs from that predicted by modeling studies and is notable for including two carbonyl oxygens of the thrombin main chain. Arg-19f occupies two binding sites on thrombin, S3'A and S3'B, which have dramatically different placements for the arginyl side chain and carboxyl terminus.
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(as it appears on PubMed at http://www.pubmed.gov), where 8855938 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8855938}}
==About this Structure==
==About this Structure==
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[[Category: Serine]]
[[Category: Serine]]
[[Category: Thrombin]]
[[Category: Thrombin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:03:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 08:38:25 2008''

Revision as of 05:38, 28 July 2008

Template:STRUCTURE 1ucy

THROMBIN COMPLEXED WITH FIBRINOPEPTIDE A ALPHA (RESIDUES 7-19). THREE COMPLEXES, ONE WITH EPSILON-THROMBIN AND TWO WITH ALPHA-THROMBIN

Template:ABSTRACT PUBMED 8855938

About this Structure

1UCY is a Protein complex structure of sequences from Bos taurus. Full crystallographic information is available from OCA.

Reference

Bovine thrombin complexed with an uncleavable analog of residues 7-19 of fibrinogen A alpha: geometry of the catalytic triad and interactions of the P1', P2', and P3' substrate residues., Martin PD, Malkowski MG, DiMaio J, Konishi Y, Ni F, Edwards BF, Biochemistry. 1996 Oct 8;35(40):13030-9. PMID:8855938

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