Comparative molecular population genetics of phycoerythrin locus in Prochlorococcus
文献类型：期刊论文
| 作者 | Zhao, Fangqing; Qin, Song |
| 刊名 | GENETICA
 |
| 出版日期 | 2007-03-01 |
| 卷号 | 129期号:3页码:291-299 |
| 关键词 | Neutrality Statistical Test Phycoerythrin Population Genetics Positive Selection Prochlorococcus |
| ISSN号 | 0016-6707 |
| DOI | 10.1007/s10709-006-0010-9 |
| 文献子类 | Article |
| 英文摘要 | As the only remainder type of phycobiliproteins in Prochlorococcus, the actual role of phycoerythrin still remains unknown. Previous studies revealed that two different forms of phycoerythrin gene were found in two ecotypes of Prochlorococcus that are specifically adapted to either high light (HL) or low light (LL) conditions. Here we analyze patterns of phycoerythrin nucleotide variation in the HL- and LL-Prochlorococcus populations. Our analyses reveal a significantly greater number of non-synonymous fixed substitutions in peB and peA than expected based on interspecific comparisons. This pattern of excess non-synonymous fixed substitutions is not seen in other five phycoerythrin-related genes (peZ/V/Y/T/S). Several neutrality statistical tests indicate an excess of rare frequency polymorphisms in the LL-Prochlorococcus data, but an excess of intermediate frequency polymorphisms in the HL-Prochlorococcus data. Distributions of the positively selected sites identified using the likelihood ratio test, when mapped onto the phycoerythrin tertiary structure, reveal that HL- and LL-phycoerythrin should be under different selective patterns. These findings may provide insights into the likely role of selection at the phycoerythrin locus and motivate further research to unveil the function of phycoerythrin in Prochlorococcus.; As the only remainder type of phycobiliproteins in Prochlorococcus, the actual role of phycoerythrin still remains unknown. Previous studies revealed that two different forms of phycoerythrin gene were found in two ecotypes of Prochlorococcus that are specifically adapted to either high light (HL) or low light (LL) conditions. Here we analyze patterns of phycoerythrin nucleotide variation in the HL- and LL-Prochlorococcus populations. Our analyses reveal a significantly greater number of non-synonymous fixed substitutions in peB and peA than expected based on interspecific comparisons. This pattern of excess non-synonymous fixed substitutions is not seen in other five phycoerythrin-related genes (peZ/V/Y/T/S). Several neutrality statistical tests indicate an excess of rare frequency polymorphisms in the LL-Prochlorococcus data, but an excess of intermediate frequency polymorphisms in the HL-Prochlorococcus data. Distributions of the positively selected sites identified using the likelihood ratio test, when mapped onto the phycoerythrin tertiary structure, reveal that HL- and LL-phycoerythrin should be under different selective patterns. These findings may provide insights into the likely role of selection at the phycoerythrin locus and motivate further research to unveil the function of phycoerythrin in Prochlorococcus. |
| 学科主题 | Genetics & Heredity |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000244092100008 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5751]  |
| 专题 | 海洋研究所_实验海洋生物学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Fangqing,Qin, Song. Comparative molecular population genetics of phycoerythrin locus in Prochlorococcus[J]. GENETICA,2007,129(3):291-299. |
| APA | Zhao, Fangqing,&Qin, Song.(2007).Comparative molecular population genetics of phycoerythrin locus in Prochlorococcus.GENETICA,129(3),291-299. |
| MLA | Zhao, Fangqing,et al."Comparative molecular population genetics of phycoerythrin locus in Prochlorococcus".GENETICA 129.3(2007):291-299. |
入库方式： OAI收割
来源：海洋研究所
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