Thr-431 and Arg-433 are part of a conserved sequence motif of the glutamine amidotransferase domain of CTP synthases and are involved in GTP activation of the Lactococcus lactis enzyme.

Abstract excerpt

A conserved sequence motif within the class 1 glutamine amidotransferase (GATase) domain of CTP synthases was identified. The sequence motif in the Lactococcus lactis enzyme is (429)GGTLRLG(435). This motif was present only in CTP synthases and not in other enzymes that harbor the GATase domain. Therefore, it was speculated that this sequence was involved in GTP activation of CTP synthase. Other members of the...

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