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1ggy

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[[Image:1ggy.gif|left|200px]]
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{{STRUCTURE_1ggy| PDB=1ggy | SCENE= }}
{{STRUCTURE_1ggy| PDB=1ggy | SCENE= }}
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'''HUMAN FACTOR XIII WITH YTTERBIUM BOUND IN THE ION SITE'''
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===HUMAN FACTOR XIII WITH YTTERBIUM BOUND IN THE ION SITE===
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==Overview==
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The presence or absence of calcium determines the activation, activity, oligomerization, and stability of blood coagulation factor XIII. To explore these observed effects, we have determined the x-ray crystal structure of recombinant factor XIII A2 in the presence of calcium, strontium, and ytterbium. The main calcium binding site within each monomer involves the main chain oxygen atom of Ala-457, and also the side chains from residues Asn-436, Asp-438, Glu-485, and Glu-490. Calcium and strontium bind in the same location, while ytterbium binds several angstroms removed. A novel ytterbium binding site is also found at the dimer two-fold axis, near residues Asp-270 and Glu-272, and this site may be related to the reported inhibition by lanthanide metals (Achyuthan, K. E., Mary, A., and Greenberg, C. S. (1989) Biochem. J. 257, 331-338). The overall structure of ion-bound factor XIII is very similar to the previously determined crystal structures of factor XIII zymogen, likely due to the constraints of this monoclinic crystal form. We have merged the three independent sets of water molecules in the structures to determine which water molecules are conserved and possibly structurally significant.
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{{ABSTRACT_PUBMED_9988734}}
==About this Structure==
==About this Structure==
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[[Category: Transglutaminase]]
[[Category: Transglutaminase]]
[[Category: Ytterbium]]
[[Category: Ytterbium]]
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Revision as of 02:16, 1 July 2008

Image:1ggy.png

Template:STRUCTURE 1ggy

HUMAN FACTOR XIII WITH YTTERBIUM BOUND IN THE ION SITE

Template:ABSTRACT PUBMED 9988734

About this Structure

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

Reference

Identification of the calcium binding site and a novel ytterbium site in blood coagulation factor XIII by x-ray crystallography., Fox BA, Yee VC, Pedersen LC, Le Trong I, Bishop PD, Stenkamp RE, Teller DC, J Biol Chem. 1999 Feb 19;274(8):4917-23. PMID:9988734

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