Table 2.
Comparison of putative RNA polymerase association loop domain among prokaryotic and plastid-encoded response regulators.
| Organism | Gene Name | Taxon | Putative RNA Polymerase Loop Domain | Accession Number |
| Heterosigma akashiwo | trg1 | raphidophyte | WGFNYSSHIDIRVV | CAB46638 |
| Emiliania huxleyi | ycf27 | haptophyte | WGYTPERYLDTRVV | AAX13858 |
| Guillardia theta | ycf27 | cryptophyte | WGYTPERHVDTRVV | AAC35613 |
| Cyanophora paradoxa | ycf27 | glaucophyte | WGYTPERHIDTRVV | AAA81319 |
| Cyanidioschyzon merolae | ycf27 | rhodophyte | WGYAWPNETRVV | BAC76163 |
| Cyanidium caldarium | ycf27 | rhodophyte | WGYKLSKHEPIADTRIV | AAF12879 |
| Cyanidium caldarium | ompR | rhodophyte | WGYTPERHLDTRVV | CAA44458 |
| Gracilaria tenuistipitata var. liui | ompR | rhodophyte | WGYKPERHVDTRVV | YP_063539 |
| Porphyra purpurea | ycf27 | rhodophyte | WGYTPERHVDTRVV | AAC08244 |
| Porphyra yezoensis | ycf27 | rhodophyte | WGYTPERHVDTRVV | Q1XDC9 |
| Porphyridium aerugineum | ompR | rhodophyte | WGYTAERQVDTRVV | CAA44464 |
| Rhodella violacea | ompR | rhodophyte | WGYTPERHIDTRVV | AAA62132 |
| Chlorokybus atmophyticus | ycf27 | charophyte | WEYGNDSYIDTRVV | ABM87971 |
| Nostoc sp. PCC7120 | ycf27 | cyanophyte | WGYTPERHVDTRVV | BAB75521 |
| Synechocystis sp. PCC6803 | ycf27 | cyanophyte | WGYTPERHVDTRVV | BAA18408 |
| Tolypothrix sp. PCC7601 | rpaB | cyanophyte | WGYTPERHVDTRVV | AAD30119 |
| Bacillus subtilis | recM | Firmicutes | WGYDYFGDVRTV | BAA05173 |
| Clostridium petringens | ompR | Firmicutes | WGYEYIGETRTV | BAB80348 |
| Lactobacillus sakei | rrp3 | Firmicutes | WGYDYFGDVRTV | AAD10263 |
| Listeria innocua | ompR | Firmicutes | WGYDYFGDVRTV | CAC95548 |
| Streptomyces coelicolor | scrA | Firmicutes | WGYRHAADTRLV | AAG15433 |
| Thermotoga maritima | drrA | Thermotogales | WGYDYYGDTRTV | AAD36722 |
| Ralstonia metallidurans | czcR | Proteobacteria | WGVNFDTDTNVV | CAA67086 |
| Escherichia coli | phoB | Proteobacteria | WGTNVYVEDRTV | P03025 |
| Escherichia coli | ompR | Proteobacteria | RGREYSAMERSI | P08402 |
The putative RNA polymerase association loop domain was identified in prokaryotic and plastid-encoded response regulators based on molecular modelling for Trg1, PhoB, and OmpR [31]. For easy comparison in the table – the data for Trg1, PhoB, and OmpR are bolded.