Rhizobium leguminosarum has a second general amino acid permease with unusually broad substrate specificity and high similarity to branched-chain amino acid transporters (Bra/LIV) of the ABC family.

Abstract excerpt

Amino acid uptake by Rhizobium leguminosarum is dominated by two ABC transporters, the general amino acid permease (Aap) and the branched-chain amino acid permease (Bra(Rl)). Characterization of the solute specificity of Bra(Rl) shows it to be the second general amino acid permease of R. leguminosarum. Although Bra(Rl) has high sequence identity to members of the family of hydrophobic amino acid transporters...

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