Skip to main content
Figure 2 | Biology Direct

Figure 2

From: Xenorhodopsins, an enigmatic new class of microbial rhodopsins horizontally transferred between archaea and bacteria

Figure 2

Protein alignment of key amino acid segments. Sequences include all xenorhodopsin homologs plus selected representatives of previously characterized microbial rhodopsin functional classes; bacteriorhodopsin (BR), halorhodopsin (HR) and sensory rhodopsins I (SR-I), II (SR-II) and III (SR-III). Shaded boxes indicate conserved residues involved in retinal binding [3]. The black box in Helix G shows a conserved Asp to Pro substitution in all xenorhodopsin proteins at this position. Retinal Schiff base proton acceptor (closed triangle) and proton donor (open triangle) residues are marked in Helix C.

Back to article page