Figure 6.

Structures of the QUA1 Gene and the QUA1 Protein.

(A) QUA1 gene structure and insertion sites of the T-DNAs in the qua1-1 and qua1-2 mutants. Numbers indicate the insertion sites of the T-DNAs (+1 being the A of the initiator ATG, +1895 being the A of the stop codon TGA). bar, Basta resistance gene; LB, left border of the T-DNA; RB, right border of the T-DNA; TATA, potential TATA box.

(B) QUA1 protein domains. ProDom protein domains of QUA1 are designated by their numbers. The ProDom 186166 domain is common to the members of the glycosyltransferase family 8 defined by Campbell et al. (1997) and contains the conserved DXD motif (DDD in QUA1). The gray box indicates the predicted transmembrane domain of QUA1. N and C regions indicate the regions of QUA1 that were used to build the phylogenetic trees in Figure 7. aa, amino acids.