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| Content Provider | PubMed Central |
|---|---|
| Author | Swingley, Wesley D. Chen, Min Cheung, Patricia C. Conrad, Amber L. Dejesa, Liza C. Hao, Jicheng Honchak, Barbara M. Karbach, Lauren E. Ahmet, Kurdoglu Lahiri, Surobhi Mastrian, Stephen D. Miyashita, Hideaki Page, Lawrence Ramakrishna, Pushpa Satoh, Soichirou Sattley, W. Matthew Shimada, Yuichiro Taylor, Heather L. Tomo, Tatsuya Tsuchiya, Tohru Wang, Zi T. Raymond, Jason Mimuro, Mamoru Blankenship, Robert E. Touchman, Jeffrey W. |
| Abstract | 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 α-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. |
| Related Links | http://dx.doi.org/10.1073/pnas.0709772105 |
| Ending Page | 2010 |
| Page Count | 6 |
| Starting Page | 2005 |
| File Format | |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 6 |
| Volume Number | 105 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2008-02-12 |
| Access Restriction | Open |
| Rights Holder | National Academy of Sciences |
| Subject Keyword | General Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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