Ma Weimin, Ogawa Teruo
Department of Biology, College of Life and Environment Sciences, Shanghai Normal University, Shanghai, China.
IUBMB Life. 2015 Jan;67(1):3-8. doi: 10.1002/iub.1341. Epub 2015 Jan 7.
Cyanobacterial NADPH dehydrogenase (NDH-1) or NDH-1-like complex is localized in the thylakoid membrane and participates in a variety of bioenergetic reactions, including respiration, cyclic electron transport around photosystem I and CO2 uptake. Over the past decade, a significant achievement has been made in identifying seven oxygenic photosynthesis-specific (OPS) subunits of NDH-1 enzyme, NdhL to NdhQ and NdhS, in several cyanobacterial strains. Six of them are also found in higher plants but not in nonphototrophs. This indicates an exclusive existence of these OPS Ndh subunits in oxygenic photosynthetic organisms and suggested certain role of cyanobacterial and chloroplastic NDH-1 in photosynthetic reactions. In this review, we describe these seven OPS subunits of cyanobacterial NDH-1, focusing on their identification, localization, function, and evolution from cyanobacteria to higher plants. A crucial role of these OPS subunits on the function of cyanobacterial NDH-1 is proposed.
蓝藻NADPH脱氢酶（NDH-1）或类NDH-1复合体定位于类囊体膜，参与多种生物能量反应，包括呼吸作用、围绕光系统I的循环电子传递以及二氧化碳的摄取。在过去十年中，在几种蓝藻菌株中鉴定出NDH-1酶的七个光合放氧特异性（OPS）亚基（从NdhL到NdhQ和NdhS）方面取得了重大进展。其中六个亚基在高等植物中也有发现，但在非光合生物中未发现。这表明这些OPS Ndh亚基仅存在于光合放氧生物中，并暗示了蓝藻和叶绿体NDH-1在光合反应中的特定作用。在本综述中，我们描述了蓝藻NDH-1的这七个OPS亚基，重点关注它们的鉴定、定位、功能以及从蓝藻到高等植物的进化。本文提出了这些OPS亚基对蓝藻NDH-1功能的关键作用。
