Details

Autor(en) / Beteiligte

• Yu, Zhen
• Kreitler, Dale F.
• Chiu, Yin Ting T.
• Xu, Ruiwen
• Bruchs, Austin T.
• Bingman, Craig A.
• Gellman, Samuel H.

Titel

Harnessing Aromatic‐Histidine Interactions through Synergistic Backbone Extension and Side Chain Modification

Ist Teil von

• Angewandte Chemie (International ed.), 2023-10, Vol.62 (40), p.e202308100-n/a

Auflage

International ed. in English

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Peptide engineering efforts have delivered drugs for diverse human diseases. Side chain alteration is among the most common approaches to designing new peptides for specific applications. The peptide backbone can be modified as well, but this strategy has received relatively little attention. Here we show that new and favorable contacts between a His side chain on a target protein and an aromatic side chain on a synthetic peptide ligand can be engineered by rational and coordinated side chain modification and backbone extension. Side chain modification alone was unsuccessful. Binding measurements, high‐resolution structural studies and pharmacological outcomes all support the synergy between backbone and side chain modification in engineered ligands of the parathyroid hormone receptor‐1, which is targeted by osteoporosis drugs. These results should motivate other structure‐based designs featuring coordinated side chain modification and backbone extension to enhance the engagement of peptide ligands with target proteins. Rational and coordinated side chain modification and backbone extension, by replacing α‐amino acid residues with β‐amino acid residues, enables favorable interaction between a His side chain on a target protein and an aromatic side chain on a synthetic peptide ligand. This strategy, which enhances affinity, is showcased with peptides that bind to the parathyroid hormone receptor 1.