Controlling time scales for electron transfer through proteins
نویسندگان
چکیده
منابع مشابه
Electron transfer in proteins.
Electron-transfer (ET) reactions are key steps in a diverse array of biological transformations ranging from photosynthesis to aerobic respiration. A powerful theoretical formalism has been developed that describes ET rates in terms of two parameters: the nuclear reorganization energy (lambda) and the electronic-coupling strength (HAB). Studies of ET reactions in ruthenium-modified proteins hav...
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4.3. Variability in cytochrome groups. . . . . . . . . . . . . . 4.4. List of cytochromes . . . . . . . . . . . . . . . . . . . . . . 4.4.1. Cytochrome-a group . . . . . . . . . . . . . . . . . 4.4.2. Cytochrome-b group . . . . . . . . . . . . . . . . . 4.4.3. Cytochrome-c group . . . . . . . . . . . . . . . . . 4.4.4. Cytochrome-d group . . . . . . . . . . . . . . . . . 5. Non-heme iron protei...
متن کاملElectron Flow through Proteins.
Electron transfers in photosynthesis and respiration commonly occur between metal-containing cofactors that are separated by large molecular distances. Employing laser flash-quench triggering methods, we have shown that 20-Å, coupling-limited Fe(II) to Ru(III) and Cu(I) to Ru(III) electron tunneling in Ru-modified cytochromes and blue copper proteins can occur on the microsecond timescale both ...
متن کاملElectron hopping through proteins.
Biological redox machines require efficient transfer of electrons and holes for function. Reactions involving multiple tunneling steps, termed "hopping," often promote charge separation within and between proteins that is essential for energy storage and conversion. Here we show how semiclassical electron transfer theory can be extended to include hopping reactions: graphical representations (c...
متن کاملSTN7 Operates in Retrograde Signaling through Controlling Redox Balance in the Electron Transfer Chain
Phosphorylation of the major photosynthetic light harvesting antenna proteins by STN7 kinase balances excitation between PSII and PSI. Phosphorylation of such abundant proteins is unique, differing distinctively from conventional tasks of protein kinases in phosphorylation of low abundance proteins in signaling cascades. Excitation balance between PSII and PSI is critical for redox homeostasis ...
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ژورنال
عنوان ژورنال: Perspectives in Science
سال: 2015
ISSN: 2213-0209
DOI: 10.1016/j.pisc.2015.06.005