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. 2013 Mar 19;104(6):1230–1237. doi: 10.1016/j.bpj.2013.02.013

Figure 5.

Figure 5

A structure of ChR2 based on the crystal structure of a channelrhodopsin C1C2 chimera (PDB ID 3UG9) with glutamine rotamers at position 117 (V156 in ChR1). Insertion of a glutamine residue was carried out with the Chimera program using the Richardson rotamer library. Hydrogen bonds between Q117 in TM3 and E101 in TM2, as well as between E101 and Q56 in TM1 are shown (dotted lines). Nitrogen atom of glutamine side chain is hydrogen bonded to the backbone carbonyl oxygen of E101 (E140 in ChR1).