論文 - 詳細
| RRC ID | 57707 |
|---|---|
| 著者 | Bibby TS, Mary I, Nield J, Partensky F, Barber J. |
| タイトル | Low-light-adapted Prochlorococcus species possess specific antennae for each photosystem. |
| ジャーナル | Nature |
| Abstract |
Prochlorococcus, the most abundant genus of photosynthetic organisms, owes its remarkably large depth distribution in the oceans to the occurrence of distinct genotypes adapted to either low- or high-light niches. The pcb genes, encoding the major chlorophyll-binding, light-harvesting antenna proteins in this genus, are present in multiple copies in low-light strains but as a single copy in high-light strains. The basis of this differentiation, however, has remained obscure. Here we show that the moderate low-light-adapted strain Prochlorococcus sp. MIT 9313 has one iron-stress-induced pcb gene encoding an antenna protein serving photosystem I (PSI)--comparable to isiA genes from cyanobacteria--and a constitutively expressed pcb gene encoding a photosystem II (PSII) antenna protein. By comparison, the very low-light-adapted strain SS120 has seven pcb genes encoding constitutive PSI and PSII antennae, plus one PSI iron-regulated pcb gene, whereas the high-light-adapted strain MED4 has only a constitutive PSII antenna. Thus, it seems that the adaptation of Prochlorococcus to low light environments has triggered a multiplication and specialization of Pcb proteins comparable to that found for Cab proteins in plants and green algae. |
| 巻・号 | 424(6952) |
| ページ | 1051-4 |
| 公開日 | 2003-8-28 |
| DOI | 10.1038/nature01933 |
| PII | nature01933 |
| PMID | 12944966 |
| MeSH | Adaptation, Physiological / genetics Adaptation, Physiological / radiation effects* Bacterial Proteins / genetics Carrier Proteins / genetics Cyanobacteria / genetics Cyanobacteria / physiology* Cyanobacteria / radiation effects* Cyanobacteria / ultrastructure Environment Gene Dosage Gene Expression Regulation, Bacterial Genes, Bacterial / genetics* Genotype Light* Light-Harvesting Protein Complexes* Photosynthetic Reaction Center Complex Proteins / genetics* Photosynthetic Reaction Center Complex Proteins / radiation effects |
| IF | 42.779 |
| 引用数 | 112 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 各媒体での言及数の合計 | 0 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 藻類 | NIES-2880 NIES-2887 |