Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acarylochloris marina

被引:171
作者
Swingley, Wesley D. [2 ]
Chen, Min [3 ]
Cheung, Patricia C. [4 ]
Conrad, Amber L. [1 ]
Dejesa, Liza C. [1 ]
Hao, Jicheng [1 ]
Honchak, Barbara M. [4 ]
Karbach, Lauren E. [4 ]
Kurdoglu, Ahmet [1 ]
Lahiri, Surobhi [4 ,5 ]
Mastrian, Stephen D. [1 ]
Miyashita, Hideaki [6 ]
Page, Lawrence [4 ]
Ramakrishna, Pushpa [7 ]
Satoh, Soichirou [6 ]
Sattley, W. Matthew [4 ]
Shimada, Yuichiro [6 ]
Taylor, Heather L. [1 ]
Tomo, Tatsuya [6 ]
Tsuchiya, Tohru [6 ]
Wang, Zi T. [4 ]
Raymond, Jason [8 ]
Mimuro, Mamoru [6 ]
Blankenship, Robert E. [4 ,5 ]
Touchman, Jeffrey W. [1 ,9 ]
机构
[1] Translat Genom Res Inst, Scottsdale, AZ 85259 USA
[2] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan
[3] Univ Sydney, Sch Biol Sci A08, Sydney, NSW 2006, Australia
[4] Washington Univ, Dept Biol, St Louis, MO 63130 USA
[5] Washington Univ, Dept Chem, St Louis, MO 63130 USA
[6] Kyoto Univ, Sakyo Ku, Kyoto 6068501, Japan
[7] Chandler Gilbert Community Coll, Chandler, AZ 85225 USA
[8] Univ Calif, Sch Nat Sci, Merced, CA 95344 USA
[9] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA
关键词
comparative microbial genomics; photosynthesis; oxygenic phototrophs; evolution; PHOTOSYNTHETIC ELECTRON-TRANSPORT; PHOTOSYSTEM-II SUPERCOMPLEX; ACARYOCHLORIS-MARINA; REACTION CENTERS; F-TYPE; LIGHT; SEQUENCE; IDENTIFICATION; EVOLUTION; PROKARYOTE;
D O I
10.1073/pnas.0709772105
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Acaryochloris marina is a unique cyanobacterium that is able to produce chlorophyll d as its primary photosynthetic pigment and thus efficiently use far-red light for photosynthesis. Acaryochloris species have been isolated from marine environments in association with other oxygenic phototrophs, which may have driven the niche-filling introduction of chlorophyll d. To investigate these unique adaptations, we have sequenced the complete genome of A. marina. The DNA content of A. marina is composed of 8.3 million base pairs, which is among the largest bacterial genomes sequenced thus far. This large array of genomic data is distributed into nine single-copy plasmids that code for >25% of the putative ORFs. Heavy duplication of genes related to DNA repair and recombination (primarily recA) and transposable elements could account for genetic mobility and genome expansion. We discuss points of interest for the biosynthesis of the unusual pigments chlorophyll d and a-carotene and genes responsible for previously studied phycobilin aggregates. Our analysis also reveals that A. marina carries a unique complement of genes for these phycobiliproteins in relation to those coding for antenna proteins related to those in Prochlorococcus species. The global replacement of major photosynthetic pigments appears to have incurred only minimal specializations in reaction center proteins to accommodate these alternate pigments. These features clearly show that the genus Acaryochloris is a fitting candidate for understanding genome expansion, gene acquisition, ecological adaptation, and photosystem modification in the cyanobacteria.
引用
收藏
页码:2005 / 2010
页数:6
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