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Figure 5
Coupling electron and proton transfer via the electron-transfer bridge and proton trigger loop. (a) Structure of AcNiR ds11 from serial data collection showing the electron-transfer bridge (wheat), the proton trigger loop (cyan) and the water chain W1–W10 connecting the T1Cu and T2Cu sites to bulk solvent. Some partial-occupancy waters have been omitted for clarity. (b) Superposition of the electron-transfer bridge and proton trigger loop residues, showing multiple conformations of Met141 and the Glu139 side chains from serial data sets ds1 (green), ds11 (orange), ds17 (purple) and ds30 (cyan).

IUCrJ
Volume 3| Part 4| July 2016| Pages 271-281
ISSN: 2052-2525
doi:10.1107/S205225251600823X