期刊
SCIENTIFIC REPORTS
卷 3, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/srep01217
关键词
-
资金
- Japan Society for the Promotion of Science (JSPS) [22245030, 23370020, 23570065, 24550065, 24750169, 24770040]
- Ministry of Education, Culture, Sports, Science and Technology in Japan (MEXT) [24107002]
- Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [23000007, 23570065, 24770040, 24750169, 23370020, 22245030, 24550065, 13J02354, 24107002, 24550201] Funding Source: KAKEN
Chlorophyllous pigments are essential for photosynthesis. Bacteriochlorophyll (BChl) b has the characteristic C8-ethylidene group and therefore is the sole naturally occurring pigment having an absorption maximum at near-infrared light wavelength. Here we report that chlorophyllide a oxidoreductase (COR), a nitrogenase-like enzyme, showed distinct substrate recognition and catalytic reaction between BChl a- and b-producing proteobacteria. COR from BChl b-producing Blastochloris viridis synthesized the C8-ethylidene group from 8-vinyl-chlorophyllide a. In contrast, despite the highly conserved primary structures, COR from BChl a-producing Rhodobacter capsulatus catalyzes the C8-vinyl reduction as well as the previously known reaction of the C7=C8 double bond reduction on 8-vinyl-chlorophyllide a. The present data indicate that the plasticity of the nitrogenase-like enzyme caused the branched pathways of BChls a and b biosynthesis, ultimately leading to ecologically different niches of BChl a- and b-based photosynthesis differentiated by more than 150 nm wavelength.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据