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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Navarro, José A. Medina, Milagros Hervás, Manuel De La Rosa, Miguel A. Martínez-júlvez, Marta Hermoso, Juan A. Herguedas, Beatriz Goñi, Guillermina Gómez-moreno, Carlos Peregrina, José R. |
| Description | Author Affiliation: Goñi G ( Departamento de Bioquímica y Biología Molecular y Celular, Universidad de Zaragoza, 50009-Zaragoza, Spain.) |
| Abstract | Under iron-deficient conditions Flavodoxin (Fld) replaces Ferredoxin in Anabaena as electron carrier from Photosystem I (PSI) to Ferredoxin-NADP $^{+}$ reductase (FNR). Several residues modulate the Fld interaction with FNR and PSI, but no one appears as specifically critical for efficient electron transfer (ET). Fld shows a strong dipole moment, with its negative end directed towards the flavin ring. The role of this dipole moment in the processes of interaction and ET with positively charged surfaces exhibited by PSI and FNR has been analysed by introducing single and multiple charge reversal mutations on the Fld surface. Our data confirm that in this system interactions do not rely on a precise complementary surface of the reacting molecules. In fact, they indicate that the initial orientation driven by the alignment of dipole moment of the Fld molecule with that of the partner contributes to the formation of a bunch of alternative binding modes competent for the efficient ET reaction. Additionally, the fact that Fld uses different interaction surfaces to dock to PSI and to FNR is confirmed. |
| ISSN | 00063002 |
| Journal | Biochimica et Biophysica Acta (BBA) - Reviews on Cancer |
| Issue Number | 3 |
| Volume Number | 1787 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2009-03-01 |
| Publisher Place | Netherlands |
| Access Restriction | Open |
| Subject Keyword | Ferredoxin-NADP Reductase Chemistry Flavodoxin Photosystem I Protein Complex Anabaena Genetics Metabolism Crystallography, X-Ray Electron Transport Physiology Kinetics Mutagenesis, Site-Directed Mutation NADP Oxidation-Reduction Static Electricity Comparative Study Research Support, Non-U.S. Gov't Biochemistry |
| Content Type | Text |
| Resource Type | Article |
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