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.

Sugawara et al. Genome Biology 2013 14:R17   doi:10.1186/gb-2013-14-2-r17

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