Download MendeleyDevelopment of mirror-image monobodies targeting the oncogenic BCR::ABL1 kinase.
Schmidt, N., Kumar, A., Korf, L., Dinh-Fricke, A.V., Abendroth, F., Koide, A., Linne, U., Rakwalska-Bange, M., Koide, S., Essen, L.O., Vazquez, O., Hantschel, O.(2024) Nat Commun 15: 10724-10724
- PubMed: 39715735
- DOI: https://doi.org/10.1038/s41467-024-54901-y
- Primary Citation of Related Structures:
9F00, 9F01 - PubMed Abstract:
Mirror-image proteins, composed of D-amino acids, are an attractive therapeutic modality, as they exhibit high metabolic stability and lack immunogenicity. Development of mirror-image binding proteins is achieved through chemical synthesis of D-target proteins, phage display library selection of L-binders and chemical synthesis of (mirror-image) D-binders that consequently bind the physiological L-targets. Monobodies are well-established synthetic (L-)binding proteins and their small size (~90 residues) and lack of endogenous cysteine residues make them particularly accessible to chemical synthesis. Here, we develop monobodies with nanomolar binding affinities against the D-SH2 domain of the leukemic tyrosine kinase BCR::ABL1. Two crystal structures of heterochiral monobody-SH2 complexes reveal targeting of the pY binding pocket by an unconventional binding mode. We then prepare potent D-monobodies by either ligating two chemically synthesized D-peptides or by self-assembly without ligation. Their proper folding and stability are determined and high-affinity binding to the L-target is shown. D-monobodies are protease-resistant, show long-term plasma stability, inhibit BCR::ABL1 kinase activity and bind BCR::ABL1 in cell lysates and permeabilized cells. Hence, we demonstrate that functional D-monobodies can be developed readily. Our work represents an important step towards possible future therapeutic use of D-monobodies when combined with emerging methods to enable cytoplasmic delivery of monobodies.
- Institute of Physiological Chemistry, Faculty of Medicine, Philipps University of Marburg, Marburg, Germany.
Organizational Affiliation:
