| RRC ID |
27110
|
| 著者 |
Tanifuji G, Erata M, Ishida K, Onodera N, Hara Y.
|
| タイトル |
Diversity of secondary endosymbiont-derived actin-coding genes in cryptomonads and their evolutionary implications.
|
| ジャーナル |
J Plant Res
|
| Abstract |
In the secondary endosymbiotic organisms of cryptomonads, the symbiont actin genes have been found together with the host one. To examine whether they are commonly conserved and where they are encoded, host and symbiont actin genes from Pyrenomonas helgolandii were isolated, and their specific and homologous regions were digoxigenin (DIG) labeled separately. Using these probes, Southern hybridization was performed on 13 species of cryptomonads. They were divided into three groups: (1) both host and symbiont actin gene signals were detected, (2) only the host actin gene signal was detected, and (3) host and unknown actin signals were detected. The phylogenetic analysis of these actin gene sequences indicated that the evolutionary rates of the symbiont actin genes were accelerated more than those of the hosts. The unknown actin signals were recognized as the highly diverged symbiont actin genes. One of the diverged symbiont actin sequences from Guillardia theta is presumed to be as a pseudogene or to its precursor. Southern hybridizations based on the samples divided by pulsed-field gel electrophoresis showed that all actin genes were encoded by the host nuclei. These results possibly represent the evolutionary fate of the symbiont actin gene in cryptomonads, which was firstly transferred from the symbiont nucleus or nucleomorph, to the host nucleus and became a pseudogene and then finally disappeared there.
|
| 巻・号 |
119(3)
|
| ページ |
205-15
|
| 公開日 |
2006-5-1
|
| DOI |
10.1007/s10265-006-0263-5
|
| PMID |
16570126
|
| MeSH |
Actins / genetics*
Base Sequence
Cryptophyta / genetics*
Cryptophyta / metabolism*
Evolution, Molecular*
Gene Expression Regulation, Plant
Genetic Variation*
Phylogeny
Symbiosis / genetics
|
| IF |
2.185
|
| 引用数 |
12
|
|
WOS 分野
|
PLANT SCIENCES
|
| リソース情報 |
| 藻類 |
NIES-697
NIES-700
NIES-701
NIES-702
NIES-708
NIES-712
NIES-765 |
