Table 2.
Variation of the genes involved in CO2-concentrating mechanism among alkaliphilic cyanobacterial strains. Pleurocapsa sp. PCC 7327 (P7), Synechococcus sp. JA-2-3B′a(2–13) (S2), Synechococcus sp. JA-3-3Ab (S3), Cyanobacterium PCC 7702 (CP), Cyanobacterium stranieri PCC 7202 (CS), Spirulina subsalsa PCC 9445 (SS), A. platensis C1 (AC), A. platensis NIES-39 (AN), A. platensis Paraca (AP), A. maxima CS-328 (AM), Arthrospira sp. PCC 8005 (A8), and Arthrospira sp. TJSD091 (AT) Numbers represent copy number of genes; nf is referred to not found; genes coding for putative NrtABCD are denoted by the symbol “?”.
| Component | Gene | Alkaliphilic strains |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Moderate alkaliphilic cyanobacteria |
Strong alkaliphilic cyanobacteria |
||||||||||||||
| Thermophiles |
Mesophiles |
||||||||||||||
| P7 | S2 | S3 | CP | CS | SS | AC | AN | AP | AM | A8 | AT | ||||
| Ci uptake systems | CO2 uptake | NDH-14 complex | ndhF4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| ndhD4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| cupB | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| NDH-13 complex | ndhF3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| ndhD3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| cupA | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| HCO3− transport | BicA | bicA1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| bicA2 | nf | nf | nf | nf | nf | 1 | 1 | 1 | 1 | 1 | 1 | nf | |||
| SbtA SbtA regulator | sbtA | nf | nf | nf | nf | nf | 1 | nf | 1 | 1 | nf | nf | nf | ||
| sbtB | nf | nf | nf | nf | nf | 1 | nf | 1 | 1 | nf | nf | nf | |||
| BCT1 | cmpA | 1 | 1 | 1 | 1 | ? | ? | ? | ? | ? | ? | ? | ? | ||
| cmpB | 1 | 1 | 1 | 1 | ? | ? | ? | ? | ? | ? | ? | ? | |||
| cmpC | 1 | 1 | 1 | 1 | ? | ? | ? | ? | ? | ? | ? | ? | |||
| cmpD | 1 | 1 | 1 | 1 | ? | ? | ? | ? | ? | ? | ? | ? | |||
| Carboxysomes | Shell proteins | β-Carboxysomal shell proteins | ccmK1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| ccmK2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmK3 | 1 | nf | nf | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmK4 | 1 | nf | nf | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmL | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmM (containing γ-CA domain) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmN | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| ccmO | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| Encapsulated enzymes | Rubisco | rbcL | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| rbcS | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| β-CA | ccaA | 1 | nf | nf | nf | 1 | 1 | nf | nf | nf | nf | nf | nf | ||