FIG 2.

Sequence alignment of the NTP transferase domain of the nucleotidyl transferases shown in Fig. 1. The highly conserved residues of the G-X-G-T-R motif are indicated in green. The residues that correspond to position 8 in Sll1558 are highlighted in red (Ala) and orange (Gly). The residues that are aligned with Gly-93 in Sll1558 are in blue. Gly-93 in Sll1558 corresponds to Gly-117 in the GalU-type UDP-Glc PPase from Corynebacterium glutamicum, as shown in Fig. S2 in the supplemental material.