FIG. 1.

Alignments of the amino acid sequences of the α-subunit (CaaD1) and β-subunit (CaaD2) of CaaD with the seven 4-OT sequences (A and B) and with the amino-terminal sequences of the subunits of the CaaD isolated from strain FG41 (C). Residues conserved throughout all sequences are indicated by an asterisk. Dashes represent residues absent in other sequences. The catalytically important residues in 4-OT are marked with + and shown in boldface. The region of highest sequence identity among CaaD1 and the 4-OT sequences is boxed. Ppa, P. pavonaceae; Bs, B. subtilis; Psp, Pseudomonas sp.; Pp, P. putida; Ps, P. stutzeri; Sa, S. aromaticivorans; Csp, coryneform bacterial strain.