5mba

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{{STRUCTURE_5mba| PDB=5mba | SCENE= }}
{{STRUCTURE_5mba| PDB=5mba | SCENE= }}
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'''BINDING MODE OF AZIDE TO FERRIC APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC ANALYSIS AT 1.9 ANGSTROMS RESOLUTION'''
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===BINDING MODE OF AZIDE TO FERRIC APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC ANALYSIS AT 1.9 ANGSTROMS RESOLUTION===
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==Overview==
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The binding mode of azide to the ferric form of Aplysia limacina myoglobin has been studied by X-ray crystallography. The three-dimensional structure of the complex has been refined at 1.9 A resolution to a crystallographic R-factor of 13.9%, including 126 ordered solvent molecules. Azide binds to the heme iron, at the sixth co-ordination position, and is oriented towards the outer part of the distal site crevice. This orientation is stabilized by an ionic interaction with the side-chain of Arg66 (E10) which, from an outer orientation in the 'aquo-met' ligand-free myoglobin, folds back towards the distal site in the presence of the anionic ligand. In the absence of a hydrogen bond donor residue at the distal E7 position in Aplysia limacina myoglobin, a different polar residue, Arg66 at the E10 topological position, has been selected by molecular evolution in order to grant ligand stabilization.
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{{ABSTRACT_PUBMED_1931125}}
==About this Structure==
==About this Structure==
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[[Category: Onesti, S.]]
[[Category: Onesti, S.]]
[[Category: Oxygen storage]]
[[Category: Oxygen storage]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 14:06:16 2008''

Revision as of 11:06, 3 July 2008

Image:5mba.png

Template:STRUCTURE 5mba

BINDING MODE OF AZIDE TO FERRIC APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC ANALYSIS AT 1.9 ANGSTROMS RESOLUTION

Template:ABSTRACT PUBMED 1931125

About this Structure

5MBA is a Single protein structure of sequence from Aplysia limacina. This structure supersedes the now removed PDB entry 2mba. Full crystallographic information is available from OCA.

Reference

Binding mode of azide to ferric Aplysia limacina myoglobin. Crystallographic analysis at 1.9 A resolution., Mattevi A, Gatti G, Coda A, Rizzi M, Ascenzi P, Brunori M, Bolognesi M, J Mol Recognit. 1991 Feb;4(1):1-6. PMID:1931125

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