2b08
From Proteopedia
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| - | | | + | {{STRUCTURE_2b08| PDB=2b08 | SCENE= }} |
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'''Reduced acetamide-bound M150G Nitrite Reductase from Alcaligenes faecalis''' | '''Reduced acetamide-bound M150G Nitrite Reductase from Alcaligenes faecalis''' | ||
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Effect of the methionine ligand on the reorganization energy of the type-1 copper site of nitrite reductase., Wijma HJ, MacPherson I, Farver O, Tocheva EI, Pecht I, Verbeet MP, Murphy ME, Canters GW, J Am Chem Soc. 2007 Jan 24;129(3):519-25. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17227014 17227014] | Effect of the methionine ligand on the reorganization energy of the type-1 copper site of nitrite reductase., Wijma HJ, MacPherson I, Farver O, Tocheva EI, Pecht I, Verbeet MP, Murphy ME, Canters GW, J Am Chem Soc. 2007 Jan 24;129(3):519-25. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17227014 17227014] | ||
[[Category: Alcaligenes faecalis]] | [[Category: Alcaligenes faecalis]] | ||
| - | [[Category: Nitrite reductase (NO-forming)]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Canters, G W.]] | [[Category: Canters, G W.]] | ||
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[[Category: Verbeet, M Ph.]] | [[Category: Verbeet, M Ph.]] | ||
[[Category: Wijma, H J.]] | [[Category: Wijma, H J.]] | ||
| - | [[Category: | + | [[Category: Acetamide]] |
| - | [[Category: | + | [[Category: Allosteric control]] |
| - | [[Category: | + | [[Category: Axial methionine]] |
| - | [[Category: | + | [[Category: Met62]] |
| - | [[Category: | + | [[Category: Reorganization energy]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:41:31 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 16:41, 3 May 2008
Reduced acetamide-bound M150G Nitrite Reductase from Alcaligenes faecalis
Overview
Copper-containing nitrite reductase harbors a type-1 and a type-2 Cu site. The former acts as the electron acceptor site of the enzyme, and the latter is the site of catalytic action. The effect of the methionine ligand on the reorganization energy of the type-1 site was explored by studying the electron-transfer kinetics between NiR (wild type (wt) and the variants Met150Gly and Met150Thr) with Fe(II)EDTA and Fe(II)HEDTA. The mutations increased the reorganization energy by 0.3 eV (30 kJ mol-1). A similar increase was found from pulse radiolysis experiments on the wt NIR and three variants (Met150Gly, Met150His, and Met150Thr). Binding of the nearby Met62 to the type-1 Cu site in Met150Gly (under influence of an allosteric effector) lowered the reorganization energy back to approximately the wt value. According to XRD data the structure of the reduced type-1 site in Met150Gly NiR in the presence of an allosteric effector is similar to that in the reduced wt NiR (solved to 1.85 A), compatible with the similarity in reorganization energy.
About this Structure
2B08 is a Single protein structure of sequence from Alcaligenes faecalis. Full crystallographic information is available from OCA.
Reference
Effect of the methionine ligand on the reorganization energy of the type-1 copper site of nitrite reductase., Wijma HJ, MacPherson I, Farver O, Tocheva EI, Pecht I, Verbeet MP, Murphy ME, Canters GW, J Am Chem Soc. 2007 Jan 24;129(3):519-25. PMID:17227014 Page seeded by OCA on Sat May 3 19:41:31 2008
