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

Biological research: BR

Yahia Mabkhot¹  Salim S. Al-Showiman²  Syed Lal Badshah³ 

[1] Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan, Pakistan;Department of Chemistry, College of Science, King Saud University, Riyad, Saudi Arabia;Department of Chemistry, Islamia College University Peshawar, Peshawar, Pakistan

关键词: Oxygenic photosynthesis;    Acaryochloris species;    Chlorophyll d;    Photosystem;    Phycobillisomes;    P740;   

DOI  :  10.1186/s40659-017-0120-0

学科分类：生物科学（综合）

来源: BioMed Central

【 摘 要 】

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.

【 授权许可】

CC BY