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. 2020 May 21;64(6):e00220-20. doi: 10.1128/AAC.00220-20

TABLE 3.

Amino acid alterations in MgrB, PhoP, PhoQ, PmrA, and PmrB in E. coli EC3000 and clinical E. coli isolates compared with E. coli MG1655

Strain Amino acid alteration ina,b:
MgrB PhoP PhoQ PmrA PmrB
EC3000 I44L S29G, G144S H2R, Δ6-11 (RPISLR), D283G
ECS01 I44L R6H S29G H2R, D283G, Y315F
ECS02 V8A I44L S29G, T31S, I128N, G144S H2R, E123D, D283G, V351I
ECS03 V8A I44L S29G, T31S, I128N, G144S H2R, E123D, D283G, V351I
ECS04 I44L S138T S29G H2R, S138N, D283G
ECS05 V8A I44L S29G, T31S, I128N, G144S H2R, E123D, D283G, V351I
ECS06 V8A I44L R6H S29G, T31S, I128N, G144S H2R, E123D, D283G, V351I
ECS07 V8A I44L S29G, T31S H2R, E123D, D283G, V351I
ECS08 V8A I44L S29G, T31S, I128N, G144S H2R, E123D, D283G, V351I
a

Boldface, amino acid substitutions found only in colistin-resistant E. coli isolates.

b

The one-letter code for the amino acid designation is used.