3c8y

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{{STRUCTURE_3c8y| PDB=3c8y | SCENE= }}
{{STRUCTURE_3c8y| PDB=3c8y | SCENE= }}
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'''1.39 Angstrom crystal structure of Fe-only hydrogenase'''
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===1.39 Angstrom crystal structure of Fe-only hydrogenase===
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==Overview==
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An X-ray crystallographic refinement of the H-cluster of [FeFe]-hydrogenase from Clostridium pasteurianum has been carried out to close-to atomic resolution and is the highest resolution [FeFe]-hydrogenase presented to date. The 1.39 A, anisotropically refined [FeFe]-hydrogenase structure provides a basis for examining the outstanding issue of the composition of the unique nonprotein dithiolate ligand of the H-cluster. In addition to influencing the electronic structure of the H-cluster, the composition of the ligand has mechanistic implications due to the potential of the bridge-head gamma-group participating in proton transfer during catalysis. In this work, sequential density functional theory optimizations of the dithiolate ligand embedded in a 3.5-3.9 A protein environment provide an unbiased approach to examining the most likely composition of the ligand. Structural, conformational, and energetic considerations indicate a preference for dithiomethylether as an H-cluster ligand and strongly disfavor the dithiomethylammonium as a catalytic base for hydrogen production.
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{{ABSTRACT_PUBMED_18324814}}
==About this Structure==
==About this Structure==
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[[Category: Metal-binding]]
[[Category: Metal-binding]]
[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Apr 24 09:53:22 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 20:41:09 2008''

Revision as of 17:41, 27 July 2008

Image:3c8y.png

Template:STRUCTURE 3c8y

1.39 Angstrom crystal structure of Fe-only hydrogenase

Template:ABSTRACT PUBMED 18324814

About this Structure

3C8Y is a Single protein structure of sequence from Clostridium pasteurianum. Full crystallographic information is available from OCA.

Reference

Dithiomethylether as a ligand in the hydrogenase h-cluster., Pandey AS, Harris TV, Giles LJ, Peters JW, Szilagyi RK, J Am Chem Soc. 2008 Apr 2;130(13):4533-40. Epub 2008 Mar 7. PMID:18324814

Page seeded by OCA on Sun Jul 27 20:41:09 2008

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