Evidence for the presence of a component of the Mn complex of the photosystem II reaction centre which is exposed to water in the S(2) state of the water oxidation complex.

Abstract:

:The interaction of water oxidising photosystem II preparations with the aqueous environment has been investigated using electron spin echo envelope modulation spectroscopy in the presence of 2H(2)O. The spectra show interaction of 2H of 2H(2)O with the preparation in the S(2) state. The component interacting with water decays during 1-4 weeks storage at 77 K. No interaction of water with the classical multiline S(2) Mn signal, which is more stable on storage at 77 K, was detected. The results show that a component of the water oxidation complex, possibly involving the Mn centre, is accessible to water and may be the water binding site for photosynthetic water oxidation.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Evans MC,Rich AM,Nugent JH

doi

10.1016/s0014-5793(00)01742-7

keywords:

subject

Has Abstract

pub_date

2000-07-14 00:00:00

pages

113-7

issue

1-2

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(00)01742-7

journal_volume

477

pub_type

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