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| [[Image:1ibf.jpg|left|200px]] | | {{Seed}} |
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| {{STRUCTURE_1ibf| PDB=1ibf | SCENE= }} | | {{STRUCTURE_1ibf| PDB=1ibf | SCENE= }} |
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| '''X-RAY 3D STRUCTURE OF P.LEIOGNATHI CU,ZN SOD MUTANT V29G'''
| | ===X-RAY 3D STRUCTURE OF P.LEIOGNATHI CU,ZN SOD MUTANT V29G=== |
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| ==Overview==
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| The functional properties and X-ray structures of five mutant forms of Photobacterium leiognathi Cu,Zn superoxide dismutase carrying single mutations at residues located at the dimer association interface have been investigated. When compared to the wild-type enzyme, the three-dimensional structures of the mutants show structural perturbations limited to the proximity of the mutation sites and substantial identity of active site geometry. Nonetheless, the catalytic rates of all mutants, measured at neutral pH and low ionic strength by pulse radiolysis, are higher than that of the wild-type protein. Such enzymatic activity increase is paralleled by enhanced active site accessibility to external chelating agents, which, in the mutated enzyme, remove more readily the active site copper ion. It is concluded that mutations at the prokaryotic Cu,Zn superoxide dismutase subunit interface can transduce dynamical perturbation to the active site region, promoting substrate active site accessibility. Such long-range intramolecular communication effects have not been extensively described before within the Cu,Zn superoxide dismutase homology family. | | The line below this paragraph, {{ABSTRACT_PUBMED_11327787}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 11327787 is the PubMed ID number. |
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| | {{ABSTRACT_PUBMED_11327787}} |
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| ==About this Structure== | | ==About this Structure== |
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| [[Category: Prokaryotic superoxide dismutase]] | | [[Category: Prokaryotic superoxide dismutase]] |
| [[Category: Subunit interaction]] | | [[Category: Subunit interaction]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:48:28 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 10:42:42 2008'' |
