Fig. 7.

Sequence alignment of several Asparate/Glutamate racemase superfamily members. The sequences were aligned using ClustalW⁴³ and the figure was produced using the ESPript server.⁴⁴ The four sequences are the K. pneumoniae allantoin racemase (HpxA), P. horikoshii hydantoin racemase (2EQ5), Bordetella bronchiseptica Arylmalonate decarboxylase (3EIS²⁶), and Bacillus anthracis glutamate racemase (2GZM⁴⁶). Red boxes with white lettering are completely conserved residues while boxes with red letters on a white background are regions of sequence similarity. The blue triangles indicate the two conserved cysteines, and the numbering and secondary structural elements shown correspond to the KpHpxA structure presented herein.