Long-range proton-coupled electron transfer in biological energy conversion: towards mechanistic understanding of respiratory complex I.
Long-range proton-coupled electron transfer in biological energy conversion: towards mechanistic understanding of respiratory complex I.
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DOI:
10.1098/rsif.2017.0916
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发表时间:
2018-04
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影响因子:
--
通讯作者:
Kaila VRI
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文献类型:
--
作者:
Kaila VRI
Biological energy conversion is driven by efficient enzymes that capture, store and transfer protons and electrons across large distances. Recent advances in structural biology have provided atomic-scale blueprints of these types of remarkable molecular machinery, which together with biochemical, biophysical and computational experiments allow us to derive detailed energy transduction mechanisms for the first time. Here, I present one of the most intricate and least understood types of biological energy conversion machinery, the respiratory complex I, and how its redox-driven proton-pump catalyses charge transfer across approximately 300 Å distances. After discussing the functional elements of complex I, a putative mechanistic model for its action-at-a-distance effect is presented, and functional parallels are drawn to other redox- and light-driven ion pumps.
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