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Nonribosomal peptide synthetases (NRPSs) are modular proteins that produce peptide antibiotics and siderophores. These enzymes act as catalytic assembly lines where substrates, covalently bound to integrated carrier domains, are delivered to adjacent catalytic domains. The carrier domains are initially loaded by adenylation domains, which use two distinct conformations to catalyze sequentially the...
Nonribosomal peptide synthetases are modular proteins that operate in an assembly line fashion to bind, modify, and link amino acids. In the E. coli enterobactin NRPS system, the EntE adenylation domain catalyzes the transfer of a molecule of 2,3-dihydroxybenzoic acid to the pantetheine cofactor of EntB. We present here the crystal structure of the EntB protein that contains an N-terminal isochorismate...
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