Table 3.
Presence of accessory genes involved in polysaccharide biosynthesis, microaerobic denitrification, lithotrophic growth, and organic sulfur utilization in the genomes of each Sinorhizobium species
| Gene present in each Sinorhizobium speciesa | ||||||
|---|---|---|---|---|---|---|
| Gene or gene cluster | Function | meliloti (n = 33) | medicae (n = 13) | fredii (n = 2) | saheli (n = 1) | terangae (n = 1) |
| Polysaccharide biosynthesis | ||||||
| exoF2 | Succinoglycan biosynthesis | 7 | 0 | 2 | 0 | 0 |
| exoH | Succinoglycan biosynthesis | 33 | 13 | 0 | 0 | 0 |
| exoI | Succinoglycan biosynthesis | 33 | 0 | 0 | 1 | 0 |
| exoI2 | Succinoglycan biosynthesis | 11 | 0 | 2 | 0 | 0 |
| exoP2 | Succinoglycan biosynthesis | 7 | 0 | 2 | 0 | 0 |
| exoTWV | Succinoglycan biosynthesis | 33 | 13 | 0 | 0 | 0 |
| expA1-10-expGCD1D2-expE1-8 | Galactoglucan biosynthesis | 33 | 13 | 0 | 0 | 1 |
| rkp-3; rkpLMNOPQ | Capsular polysaccharides biosynthesis | 4 | 0 | 2 | 0 | 1 |
| rkpZ1 | Capsular polysaccharides biosynthesis | 33 | 13 | 1 | 1 | 1 |
| rkpZ2 | Capsular polysaccharides biosynthesis | 5 | 0 | 2 | 1 | 1 |
| rkpT2 | Surface polysaccharide export | 29 | 13 | 1 | 1 | 1 |
| cgmB | Cyclic β-glucan biosynthesis | 1 | 0 | 0 | 0 | 0 |
| Microaerobic denitrification | ||||||
| napEFDABC | Nitrate reductase | 32 | 13 | 2 | 1 | 1 |
| nirKV | Nitrite reductase | 19 | 9 | 2 | 1 | 1 |
| norECBQD | Nitric oxide reductase | 21 | 9 | 2 | 1 | 1 |
| nosRZDFYLX | Nitrous oxide reductase | 22 | 0 | 0 | 0 | 0 |
| Lithotroph | ||||||
| hupSLCDEFGHJKP-hypABFCDE-hoxX | Uptake hydrogenase | 0 | 0 | 0 | 0 | 1 |
| soxYZEF-like | Sulfur oxidation | 7 | 0 | 2 | 0 | 0 |
| soxZ | Sulfur oxidation | 33 | 13 | 2 | 0 | 0 |
| Organic sulfur utilizationb | ||||||
| I: ssuDABCE | Alkanesulfonate degradation | 33 | 13 | 0 | 0 | 1 |
| II: tauRABCXD | Taurine degradation | 33 | 13 | 0 | 0 | 0 |
| III: ssuCBA-atsA-like | Arylsulfatase | 0 | 13 | 0 | 0 | 0 |
| IV: tauC-ssuCBA-ats- like | Arylsulfatase | 0 | 13 | 0 | 0 | 0 |
| V: ssuADCB | Alkanesulfonate degradation | 0 | 0 | 2 | 0 | 0 |
aValues in a column indicate number of strains possessing a gene or gene cluster in a species. bThe genes in each gene cluster are orthologs of Smed_4212-4216 (I), Smed_4858-4863 (II), Smed_1127-1130 (III), Smed_3146-3151 in S. medicae WSM419, and U205v1_247004-247007 (V) in S. fredii USDA 205.