ATP phosphoribosyltransferase MLRIAVPNKGMLSEPAWNMLAEAGYRLRINPRQLVVQDPDNGIELFYLRPLDIAVYVGRGAIDVGITGQDLLKNSGTAALEHMPLGFGASTFRFAAPNESPITTLEDVQGKRVATTFDKLVHDYLVEHGIQAETIHLDGAVESSVQLGVADLIADVVSTGTTLRNAGLRVFAEPLMHSEACLIRSPRLNEQDPRLAVLTRRLQGVLTAHQYVLMDYDIPISKVAAAVAVTPGFESPTISPLHDKQWNAVRVMVPKAKVNQLMDDLYEVGARGIIVTALQASRM hisG Blon_1366 HIS1_BIFLS Catalyzes the condensation of ATP and 5-phosphoribose 1- diphosphate to form N'-(5'-phosphoribosyl)-ATP (PR-ATP). Has a crucial role in the pathway because the rate of histidine biosynthesis seems to be controlled primarily by regulation of hisG enzymatic activity (By similarity). BLIJ_1410 283