- Abstract:
-
The 7Fe ferredoxin from Azotobacter vinelandii (AvFdI) contains a [3Fe-4S](+/0) cluster that binds a single proton in its reduced level. Although the cluster is buried, and therefore inaccessible to solvent, proton transfer from solvent to the cluster is fast. The kinetics and energetics of the coupled electron-proton transfer reaction at the cluster have been analyzed in detail by protein-film voltammetry, to reveal that proton transfer is mediated by the mobile carboxylate of an adjacent su...
Expand abstract - Publication status:
- Published
- Publisher copy:
- 10.1021/bi035021v
-
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- Journal:
- Biochemistry
- Volume:
- 42
- Issue:
- 36
- Pages:
- 10589-10599
- Publication date:
- 2003-09-05
- DOI:
- EISSN:
-
1520-4995
- ISSN:
-
0006-2960
- URN:
-
uuid:6d40dde1-f6ec-42cc-aaae-d2d6022fbe65
- Source identifiers:
-
32453
- Local pid:
- pubs:32453
- Copyright date:
- 2003
Journal article
Mechanisms of redox-coupled proton transfer in proteins: role of the proximal proline in reactions of the [3Fe-4S] cluster in Azotobacter vinelandii ferredoxin I.
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