1.14.11.B15 S-(L-glutamyl)-[peptidyl-carrier protein of nonribosomal peptide synthetase KtzH] + 2-oxoglutarate + O2 = S-(erythro-3-hydroxy-L-glutamyl)-[peptidyl-carrier-protein of nonribosomal peptide synthetase KtzH] + succinate + CO2 - -