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Review
. 2017 May 19;50(1):16.
doi: 10.1186/s40659-017-0120-0.

Photosynthesis at the far-red region of the spectrum in Acaryochloris marina

Syed Lal Badshah  1   2 , Yahia Mabkhot  3 , Salim S Al-Showiman  4
Affiliations
Review

Photosynthesis at the far-red region of the spectrum in Acaryochloris marina

Syed Lal Badshah et al. Biol Res. .

Abstract

Acaryochloris marina is an oxygenic cyanobacterium that utilizes far-red light for photosynthesis. It has an expanded genome, which helps in its adaptability to the environment, where it can survive on low energy photons. Its major light absorbing pigment is chlorophyll d and it has α-carotene as a major carotenoid. Light harvesting antenna includes the external phycobilin binding proteins, which are hexameric rods made of phycocyanin and allophycocyanins, while the small integral membrane bound chlorophyll binding proteins are also present. There is specific chlorophyll a molecule in both the reaction center of Photosystem I (PSI) and PSII, but majority of the reaction center consists of chlorophyll d. The composition of the PSII reaction center is debatable especially the role and position of chlorophyll a in it. Here we discuss the photosystems of this bacterium and its related biology.

Keywords: Acaryochloris species; Chlorophyll d; Oxygenic photosynthesis; P740; Photosystem; Phycobillisomes.

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Figures

Fig. 1
Fig. 1
Molecular structure; carbon numbering and specific groups in chlorophyll a and d molecules
See this image and copyright information in PMC

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