Review and Hypothesis. New insights into the reaction mechanism of transhydrogenase: Swivelling the dIII component may gate the proton channel
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Colleges, School and Institutes
The membrane protein transhydrogenase in animal mitochondria and bacteria couples reduction of NADP+ by NADH to proton translocation. Recent X-ray data on Thermus thermophilus transhydrogenase indicate a significant difference in the orientations of the two dIII components of the enzyme dimer (Leung et al., 2015). The character of the orientation change, and a review of information on the kinetics and thermodynamics of transhydrogenase, indicate that dIII swivelling might assist in the control of proton gating by the redox state of bound NADP+/NADPH during enzyme turnover.
|Number of pages||7|
|Publication status||Published - 1 Jul 2015|
- Transhydrogenase, Membrane-protein structure, Nicotinamide nucleotide, Proton-pump, Proton-gating