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Figure 2
Details of the structural rearrangement accompanying the Tyr323 flip. (a) The wt RpNiR–NO (green), RpNiR D97N–NO (cyan) and RpNiR D97N–NO2− (magenta) structures show a similar conformation of Tyr323 and loop (Ser315–Ser321) which differs from the free oxidized resting-state wt RpNiR (grey). (b) The narrow putative NO-release channel opened by the conformational change, with resting-state Tyr323 shown in grey. T2Cu coordination bonds are coloured red. Water molecules are shown as red spheres.

IUCrJ
Volume 5| Part 4| July 2018| Pages 510-518
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518008242