Figure 1.

Amino acid sequences of AtGGT (accession no. S58286) and other putative γ-GTs from Arabidopsis (corresponding accession nos. put as names) aligned with the human (accession no. P19440) and mouse (accession no. Q60928) enzymes. Identical amino acids in all sequences are boxed. Amino acids homologous to AtGGT are shadowed. Membrane-anchoring domains and putative membrane-anchoring domains of the mammalian and plant enzymes are underlined. The open arrow points to the protease cleavage site. Amino acids important for the substrate binding and those essential for the catalytic activity are marked with asterisks and black circles, respectively. Putative glycosylated amino acids in the sequence of AtGGT are indicated by black rectangles.