. Author manuscript; available in PMC: 2016 Oct 27.

Published in final edited form as: Adv Enzyme Res. 2014 Mar;2(1):39–48. doi: 10.4236/aer.2014.21004

Table 1.

Comparison of Ps. CPG₂ metal binding sites with E. coli AbgA and AbgB homologies, based on alignments performed with Ps. CPG₂ and each subunit alone.

Ps-CPG₂	E. coli AbgA homolog	E. coli AbgB homolog
Zinc1/2^*: Asp (D141)	His(H146); Asp (D147)	His (H111)
Zinc1: Glu (E176)	Glu (E183)	Glu (E146)
Zinc1: His(H385)	His (H406)	Gly (G409)
Zinc2: Glu (E200)	Thr(T205)	His (H171)
Zinc2: His (H112)	Asp (D116)	Glu (E81)

In Ps-CPG₂ each carboxylate oxygen of Asp (D141) coordinates with a different zinc.