1vlx

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{{STRUCTURE_1vlx| PDB=1vlx | SCENE= }}
{{STRUCTURE_1vlx| PDB=1vlx | SCENE= }}
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'''STRUCTURE OF ELECTRON TRANSFER (COBALT-PROTEIN)'''
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===STRUCTURE OF ELECTRON TRANSFER (COBALT-PROTEIN)===
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==Overview==
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The crystal structure of cobalt-substituted azurin from Pseudomonas aeruginosa has been determined to final crystallographic R value of 0.175 at 1.9 A resolution. There are four molecules in the asymmetric unit in the structure, and these four molecules are packed as a dimer of dimers. The dimer packing is very similar to that of the wild-type Pseudomonas aeruginosa azurin dimer. Replacement of the native copper by the cobalt ion has only small effects on the metal binding site presumably because of the existence of an extensive network of hydrogen bonds in its immediate neighborhood. Some differences are obvious, however. In wild-type azurin the copper atom occupies a distorted trigonal bipyramidal site, while cobalt similar to zinc and nickel occupy a distorted tetrahedral site, in which the distance to the Met121,S(delta) atom is increased to 3.3-3.5 A and the distance to the carbonyl oxygen of Gly45 has decreased to 2.1-2.4 A. The X-band EPR spectrum of the high-spin Co(II) in azurin is well resolved (apparent g values gx' = 5.23; gy' = 3.83; gz' = 1.995, and hyperfine splittings Ax' = 31; Ay' = 20-30; Az' = 53 G) and indicates that the ligand field is close to axial.
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(as it appears on PubMed at http://www.pubmed.gov), where 9094740 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9094740}}
==About this Structure==
==About this Structure==
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[[Category: Periplasmic]]
[[Category: Periplasmic]]
[[Category: Signal]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 12:42:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 23:00:31 2008''

Revision as of 20:00, 27 July 2008

Image:1vlx.png

Template:STRUCTURE 1vlx

STRUCTURE OF ELECTRON TRANSFER (COBALT-PROTEIN)

Template:ABSTRACT PUBMED 9094740

About this Structure

1VLX is a Single protein structure of sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA.

Reference

The metal site of Pseudomonas aeruginosa azurin, revealed by a crystal structure determination of the Co(II) derivative and Co-EPR spectroscopy., Bonander N, Vanngard T, Tsai LC, Langer V, Nar H, Sjolin L, Proteins. 1997 Mar;27(3):385-94. PMID:9094740

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