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AbgT family transporter
p-aminobenzoyl-glutamate transporter
p-aminobenzoyl-glutamate transporter mediates the concentration-dependent uptake of p-aminobenzoyl-glutamate (PABA-GLU) into the cell and allows accumulation of PABA-GLU to a concentration enabling AbgAB to catalyze cleavage into p-aminobenzoate and glutamate
AbgT family antimetabolite efflux transporter
The p-Aminobenzoyl-glutamate transporter family includes two transporters, the AbgT (YdaH) protein of E. coli and MtrF of Neisseria gonorrhoea. AbgT is apparently cryptic in wild type cells, but when expressed on a high copy number plasmid, or when expressed at higher levels due to mutation, it allows utilization of p-aminobenzoyl-glutamate as a source of p-aminobenzoate for p-aminobenzoate auxotrophs. p-Aminobenzoate is a constituent of and a precursor for the biosynthesis of folic acid.
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