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Figure 4
(a) The C3 exoenzyme from Clostridium botulinum (PDB entry 1r4b). The substrate recognition loop is indicated with a red arrow. (b) The crystal structure of YenC3CTD (PDB entry 6aqk). (c) The structure of SpvB from S. typhimurium in complex with NAD (shown as sticks) (PDB entry 2gwl). The helical insertion in the central β-sheet is indicated with a blue arrow. All structures are coloured from blue at the N-terminus to red at the C-terminus.

IUCrJ
Volume 11| Part 3| May 2024| Pages 299-308
ISSN: 2052-2525
https://doi.org/10.1107/S2052252524001969