Comparative genomics of the core and accessory genomes of 48 Sinorhizobiumstrains comprising five genospecies

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*species^a
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 utilization ^b
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.

ISSN: 1474-760X