Table 2

Number of genes encoding antimicrobial efflux pumps in the genomes of rhizobia
Number of transporters
Superfamily/Family RtaCIAT899 Rsp PRF81 Re CFN42 Rl 3841 Sm 1021 Ssp NGR234 Mh MAFF Bj USDA110 Ac ORS571 BcbJ2315
MFS c 46 43 31 36 32 24 35 34 21 53
RND c 12 11 8 8 8 10 10 19 10 14
MATE 4 4 3 4 2 2 4 7 4 3
SMR c 2 2 2 2 4 5 2 3 2 2
Total number 64 60 44 50 46 41 51 63 37 72
Number/Mb 9.6 8.4 6.8 6.4 6.8 5.9 6.7 6.9 6.9 9.3

a Rt, R. tropici; Rsp, Rhizobium sp.; Re, R. etli; Rl, R. leguminosaum; Sm, S. meliloti; Ssp, Sinorhizobium sp.; Mh, M. huakuii; Bj, B. japonicum; Ac, A. caulinodans; Bc, Burkholderia cenocepacia.

bBurkholderia cenocepacia J2315 was included as an example of a multiresistant bacteria.

c Only members belonging to antimicrobial extrusion families were counted. For multigene systems, only the inner membrane component was counted.

Ormeño-Orrillo et al.

Ormeño-Orrillo et al. BMC Genomics 2012 13:735   doi:10.1186/1471-2164-13-735

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