A structural role for tryptophan in proteins, and the ubiquitous Trp Cδ1—H⋯O=C (backbone) hydrogen bond

Szczygiel, M.; Derewenda, U.; Scheiner, S.; Minor, W.; Derewenda, Z.S.

doi:10.1107/S2059798324005515

Acta Crystallographica Section D
Acta Crystallographica
Section D STRUCTURAL BIOLOGY

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Figure 14
Examples of the three conformational Trp clusters in the +4 class. (a) m0 (PDB entry 7mzy; only the C^β atoms of non-Trp residues are shown for clarity, (b) m105 (PDB entry 4gxw), (c) p-90 (PDB entry 3s92). Note that all motifs contain hydrogen bonds from the ^TrpC^δ1—H and amide groups to the i − 4 carbonyl, capping it with a three-centred bond.

STRUCTURAL
BIOLOGY

ISSN: 2059-7983

Volume 80| Part 7| July 2024| Pages 551-562

https://doi.org/10.1107/S2059798324005515

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