Figure 5.

Amino acid sequence alignments of the proposed two-component histidine kinase motif present in AtBphP2 with similar motifs from a variety of other bacteria proteins. Representatives include BphPs from R. leguminosarium (Rl), P. putida (Pp), R. palustris (Rp), and P. syringae (Ps), ExsG from the AtBphP1 operon, and predicted sensory proteins from a variety of bacteria, including Caulobacter crescentus (Cc), S. meliloti (Sm), Xanthomonas axonopodis (Xa), Xanthomonas campestris (Xc), and B. melitensis (Bm). Reverse type and gray boxes denote identical and similar amino acids, respectively. Brackets identify the H-box, a potential N-box, and a Gly-rich domain, and the arrowhead locates the conserved histidine presumed to form the phosphorylated intermediate. Asterisks show conserved residues that help distinguish this family from others within the two-component kinase superfamily.