Table 2.
Gene content and distribution of glutaredoxins in eukaryote photosynthetic organisms
| Class I | Class II | Class III | Class IV | Other | Total | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | C1 | C2 | C3 | C4 | C5/S12 | Total | S14 | S15 | S16 | S17 | ||||||
| Haptophyte | Emiliania huxleyi | 6 | – | – | – | – | – | 3 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 9 |
| Diatoms | Phaeodactylum tricornutum | 4 | – | – | – | – | – | 3 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 6 |
| Thalassiosira pseudonana | 2 | – | – | – | – | – | 3 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 5 | |
| Red algae | Cyanidioschyzon merolae | 2 | – | – | – | – | – | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 4 |
| Green algae | Micromonas pusilla CCMP1545 | 3 | – | – | – | – | – | 5 | 2 | 1 | 1 | 1 | 0 | 2 | 0 | 10 |
| Micromonas RCC299 | 4 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 2 | 0 | 10 | |
| Ostreococcus tauri | 0 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 5 | |
| Ostreococcus lucimarinus | 0 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 5 | |
| Ostreococcus RCC809 | 0 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 5 | |
| Chlorella vulgaris | 2 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 7 | |
| Volvox carteri | 2 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 7 | |
| Chlamydomonas reinhardtii | 2 | – | – | – | – | – | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 8 | |
| Moss | Physcomitrella patens | 5 | 0 | 3 | 1 | 0 | 1 | 8 | 2 | 2 | 1 | 3 | 2 | 0 | 0 | 15 |
| Lycophytes | Selaginella moellendorffii | 4 | 0 | 2 | 0 | 1 | 1 | 9 | 3 | 3 | 1 | 2 | 2 | 1 | 0 | 16 |
| Monocots | Sorghum bicolor | 5 | 0 | 2 | 1 | 1 | 1 | 6 | 1 | 2 | 2 | 1 | 19 | 2 | 0 | 32 |
| Oryza sativa | 5 | 0 | 2 | 1 | 1 | 1 | 5 | 1 | 2 | 1 | 1 | 17 | 2 | 0 | 29 | |
| Dicots | Vitis vinifera | 5 | 1 | 1 | 1 | 1 | 1 | 5 | 2 | 1 | 1 | 1 | 13 | 2 | 0 | 25 |
| Medicago truncatula | 6 | 2 | 1 | 1 | 1 | 1 | 5 | 2 | 1 | 1 | 1 | 18 | 2 | 0 | 31 | |
| Arabidopsis thaliana | 6 | 1 | 1 | 1 | 1 | 2 | 4 | 1 | 1 | 1 | 1 | 21 | 2 | 0 | 33 | |
| Populus trichocarpa | 6 | 2 | 1 | 1 | 1 | 1 | 5 | 1 | 1 | 1 | 2 | 24 | 3 | 0 | 38 | |
| Total | 69 | 91 | 116 | 25 | 1 | 302 | ||||||||||
The Grx sequences have been identified in 20 different eukaryote genomes (algae, bryophyte, lycophyte, and angiosperms). They essentially belong to four different classes, C. reinhardtii having a specific fusion protein (a Grx domain followed by a domain with a homology to a dicarboxylate transporter) not found elsewhere. As for cyanobacteria, all organisms, except Ostreococcus species, contain Grxs from classes I and II. Grxs of class III are only found in land plants and those of class IV in most organisms