Figure 3.

Sequence alignment of four Csd4 homologues. Sequence alignment of Csd4 from H. pylori strain 26695 (HP_Csd4; SWISS-PROT accession code O25708), Pgp1 from Campylobacter jejuni (CJ_Pgp1; A1W0W1), Csd4 from Wolinella succinogenes (WS_Csd4; Q7MSQ3) and Csd4 from H. pylori strain J99 (JHP_Csd4; Q9ZM72) was performed and presented using ClustalX (Larkin et al., 2007 ▶) and ESPript (Gouet et al., 2003 ▶; http://espript.ibcp.fr). Red and blue triangles indicate the metal-binding site motif (Gln46, Glu49 and His128) and the two key Arg residues (Arg86 and Arg94) showing conformational changes in the active site of the CPase domain. Green circles indicate the Ca²⁺-binding motif in the C-terminal Ig-like domain.