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Figure 7
Flexibility of the β3–β4 loop in the B repeat. (a) Overlay of B repeats from the V333E variant (green) and T336Y chains A (dark blue), B (blue) and C (cyan). For T336Y chain C, Cα atoms of the first residue (Tyr361) and last residue (Tyr376) of the deviating loop are shown as cyan spheres. (b) Overlay of T336Y chain C (cyan) and wild-type InlB392 (gray; PDB entry 7pv9). For the wild type, Cα atoms of the last residue before and the first residue after the disordered region are shown as red spheres. (c) Overlay of all 13 B-repeat instances available in the PDB, each in a different color: PDB entries 2y5p (B repeat) chains A–D, 7nms (InlB392 T332E variant, crystal form II), 7pv8 (InlB392 T332E variant, crystal form I), 7pv9 (wild-type InlB392) chains A–C, 9qr4 (InlB392 T336Y variant) chains A–C and 9qr5 (InlB392 V333E variant).

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 82| Part 1| January 2026| Pages 4-13
https://doi.org/10.1107/S2053230X25010416
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