University of Illinois Urbana-Champaign

Biochemical Studies of the Sodium -Translocating NADH:ubiquinone Oxidoreductase

Zhou, Weidong

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Description

Title
Biochemical Studies of the Sodium -Translocating NADH:ubiquinone Oxidoreductase
Author(s)
Zhou, Weidong
Issue Date
2002
Doctoral Committee Chair(s)
Gennis, Robert B.
Department of Study
Biochemistry
Discipline
Biochemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biophysics, General
Language
eng
Abstract
In the NqrF subunit, four conserved cysteines (C70, C76, C79 and C111) are predicted to ligate the 2Fe-2S center, and three conserved residues (R210, Y212, S245) are predicted to be essential to the binding of the FAD cofactor. By mutagenesis and spectroscopic characterization, the four conserved cysteines are confirmed to be the ligands for the 2Fe-2S center, and R210, Y212, S245 are confirmed to be important for the binding of the FAD cofactor in Na +-NQR. Functional studies on these mutants strongly support an electron transport pathway model in which the non-covalently bound FAD in the NqrF subunit is the first redox cofactor to take electrons from the substrate, NADH, and that the electrons then flow to the 2Fe-2S center.
Graduation Semester
2002
Type of Resource
text
Permalink
http://hdl.handle.net/2142/84783

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