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HisG, C-terminal domain
ATP phosphoribosyltransferase
This domain corresponds to the C-terminal third of the HisG protein. It is absent in many lineages.
ATP phosphoribosyltransferase, the first enzyme in the histidine biosynthetic pathway, catalyzes the condensation of ATP and 5-phosphoribose 1-diphosphate to form N'-(5'-phosphoribosyl)-ATP (PR-ATP)
HisG, ATP phosphoribosyltransferase, is an enzyme of histidine biosynthesis. This HMM excludes a C-terminal extension region that is variably present.
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