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Figure 7
Illustration of protonation states of catalytic Asp97 and His240. (A) The resting state of catalytic T2Cu site in wtRpNiR (3ziy) shows the presence of W2 and doubly hydrogen-bonded Oδ2Asp97 to W1 and Tyr323. (B) The reduced state of catalytic T2Cu site in wtRpNiR shows that W2 is lost and Asp97 is negatively charged. (C) The reduced state of catalytic T2Cu site in Phe295Leu RpNiR shows the bent conformation of Tyr323, and similar states as in reduced wtRpNiR.

IUCrJ
Volume 13| Part 4| July 2026|
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526004549