AustralieFrV1, Main, Exploration, bibRecord, 00A184

The nature of the photosystem II reaction centre in the chlorophyll d-containing prokaryote, Acaryochloris marina

Identifieur interne : 00A184 ( Main/Exploration ); précédent : 00A183; suivant : 00A185

The nature of the photosystem II reaction centre in the chlorophyll d-containing prokaryote, Acaryochloris marina

Auteurs : Min Chen [Australie] ; Alison Telfer [Royaume-Uni] ; Su Lin [États-Unis] ; Andrew Pascal [France] ; Anthony W. D. Larkum [Australie] ; James Barber [Royaume-Uni] ; Robert E. Blankenship [États-Unis]

Source :

Photochemical & Photobiological Sciences [ 1474-905X ] ; 2005.

RBID : ISTEX:3EF334B3E7DA2A314AF2774B50BEBED72FCEBF94

English descriptors

Abstract

Pigment–protein complexes enriched in photosystem II (PS II) have been isolated from the chlorophyll (Chl) d containing cyanobacterium, Acaryochloris marina. A small PS II-enriched particle, we call ‘crude reaction centre’, contained 20 Chl d, 0.5 Chl a and 1 redox active cytochrome b-559 per 2 pheophytin a, plus the D1 and D2 proteins. A larger PS II-enriched particle, we call ‘core’, additionally bound the antenna complexes, CP47 and CP43, and had a higher chlorophyll per pheophytin ratio. Pheophytin a could be photoreduced in the presence of a strong reductant, indicating that it is the primary electron acceptor in photosystem II of A. marina. A substoichiometric amount of Chl a (less than one chlorophyll a per 2 pheophytin a) strongly suggests that Chl a does not have an essential role in the photochemistry of PS II in this organism. We conclude that PS II, in A. marina, utilizes Chl d and not Chl a as primary electron donor and that the primary electron acceptor is one of two molecules of pheophytin a.

Url:

https://api.istex.fr/document/3EF334B3E7DA2A314AF2774B50BEBED72FCEBF94/fulltext/pdf

DOI: 10.1039/b507057k

Affiliations:

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Le document en format XML

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<term>Acaryochloris marina</term>
<term>Acceptor</term>
<term>Centre</term>
<term>Chlorophyll</term>
<term>Crystal structure</term>
<term>Cytochrome</term>
<term>Dithionite</term>
<term>Enzymic oxygen trap</term>
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<term>Essential role</term>
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<term>Light harvesting</term>
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<term>Marina</term>
<term>Marina cells</term>
<term>Marina complexes</term>
<term>Maximum stoichiometry</term>
<term>Miyachi</term>
<term>Miyashita</term>
<term>Oxygen trap</term>
<term>Oxygenic</term>
<term>Oxygenic photosynthesis</term>
<term>Pheo</term>
<term>Pheophytin</term>
<term>Photosynthesis</term>
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<term>Reaction centers</term>
<term>Reaction centre</term>
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<term>Sodium dithionite</term>
<term>Split water</term>
<term>State energy</term>
<term>Stoichiometry</term>
<term>Structural models</term>
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<term>Trends biochem</term>
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<front><div type="abstract">Pigment–protein complexes enriched in photosystem II (PS II) have been isolated from the chlorophyll (Chl) d containing cyanobacterium, Acaryochloris marina. A small PS II-enriched particle, we call ‘crude reaction centre’, contained 20 Chl d, 0.5 Chl a and 1 redox active cytochrome b-559 per 2 pheophytin a, plus the D1 and D2 proteins. A larger PS II-enriched particle, we call ‘core’, additionally bound the antenna complexes, CP47 and CP43, and had a higher chlorophyll per pheophytin ratio. Pheophytin a could be photoreduced in the presence of a strong reductant, indicating that it is the primary electron acceptor in photosystem II of A. marina. A substoichiometric amount of Chl a (less than one chlorophyll a per 2 pheophytin a) strongly suggests that Chl a does not have an essential role in the photochemistry of PS II in this organism. We conclude that PS II, in A. marina, utilizes Chl d and not Chl a as primary electron donor and that the primary electron acceptor is one of two molecules of pheophytin a.</div>
</front>
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The nature of the photosystem II reaction centre in the chlorophyll d-containing prokaryote, Acaryochloris marina

The nature of the photosystem II reaction centre in the chlorophyll d-containing prokaryote, Acaryochloris marina

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri