Localization of two phylloquinones, QK and QK', in an improved electron density map of photosystem I at 4-A resolution.
J Biol Chem
; 274(11): 7361-7, 1999 Mar 12.
Article
em En
| MEDLINE
| ID: mdl-10066800
ABSTRACT
An improved electron density map of photosystem I from Synechococcus elongatus calculated at 4-A resolution for the first time reveals a second phylloquinone molecule and thereby completes the set of cofactors constituting the electron transfer system of this iron-sulfur type photosynthetic reaction center six chlorophyll a, two phylloquinones, and three Fe4S4 clusters. The location of the newly identified phylloquinone pair, the individual plane orientations of these molecules, and the resulting distances to other cofactors of the electron transfer system are discussed and compared with those determined by magnetic resonance techniques.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vitamina K 1
/
Complexo de Proteínas do Centro de Reação Fotossintética
Idioma:
En
Ano de publicação:
1999
Tipo de documento:
Article