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Article

Alteration of the H-bond to the A(1A) phylloquinone in Photosystem I: influence on the kinetics and energetics of electron transfer.

The journal of physical chemistry. B - 3 Mar 2011

Srinivasan Nithya, Santabarbara Stefano, Rappaport Fabrice, Carbonera Donatella, Redding Kevin, van der Est Art, Golbeck John H

Abstract excerpt

In Photosystem I, the backbone nitrogen of Leu722(PsaA) forms a hydro-gen bond with the C(4) carbonyl oxygen of phylloquinone in the A(1A) site. A previous low-temperature EPR study indicated that substitution of Leu722(PsaA) with a bulky Trp residue results in a weakened H-bond. Here, we employ room temperature, time-resolved optical spectroscopy and variable temperature, transient EPR spectroscopy to probe the...

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PMID: 21299208
DOI: 10.1021/jp109531b

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Alteration of the H-bond to the A(1A) phylloquinone in Photosystem I: influence on the kinetics and energetics of electron transfer.PMID 21299208Read ↗

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