Cyclic peptides can engage a single binding pocket through highly divergent modes. Patel, K., Walport, L., Walshe, J., Solomon, P., Low, J., Tran, D., Mouradian, K., Silva, A., Wilkinson-White, L., Norman, A., Franck, C., Matthews, J., Mitchell Guss, J., Payne, R., Passioura, T., Suga, H., & Mackay, J. Proceedings of the National Academy of Sciences of the United States of America, 2020. doi abstract bibtex 1 download © 2020 National Academy of Sciences. All rights reserved. Cyclic peptide library screening technologies show immense promise for identifying drug leads and chemical probes for challenging targets. However, the structural and functional diversity encoded within such libraries is largely undefined. We have systematically profiled the affinity, selectivity, and structural features of library-derived cyclic peptides selected to recognize three closely related targets: the acetyllysine-binding bromodomain proteins BRD2, -3, and -4. We report affinities as low as 100 pM and specificities of up to 106-fold. Crystal structures of 13 peptide–bromodomain complexes reveal remarkable diversity in both structure and binding mode, including both α-helical and β-sheet structures as well as bivalent binding modes. The peptides can also exhibit a high degree of structural preorganization. Our data demonstrate the enormous potential within these libraries to provide diverse binding modes against a single target, which underpins their capacity to yield highly potent and selective ligands.
@article{
title = {Cyclic peptides can engage a single binding pocket through highly divergent modes},
type = {article},
year = {2020},
keywords = {BET bromodomain inhibition,BRD3,BRD4,De novo cyclic peptides,Structural biology},
volume = {117},
id = {6636c6a0-e2f0-3aea-af8c-7865a5f17fcf},
created = {2020-12-17T07:26:41.435Z},
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last_modified = {2020-12-17T07:26:41.435Z},
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abstract = {© 2020 National Academy of Sciences. All rights reserved. Cyclic peptide library screening technologies show immense promise for identifying drug leads and chemical probes for challenging targets. However, the structural and functional diversity encoded within such libraries is largely undefined. We have systematically profiled the affinity, selectivity, and structural features of library-derived cyclic peptides selected to recognize three closely related targets: the acetyllysine-binding bromodomain proteins BRD2, -3, and -4. We report affinities as low as 100 pM and specificities of up to 106-fold. Crystal structures of 13 peptide–bromodomain complexes reveal remarkable diversity in both structure and binding mode, including both α-helical and β-sheet structures as well as bivalent binding modes. The peptides can also exhibit a high degree of structural preorganization. Our data demonstrate the enormous potential within these libraries to provide diverse binding modes against a single target, which underpins their capacity to yield highly potent and selective ligands.},
bibtype = {article},
author = {Patel, K. and Walport, L.J. and Walshe, J.L. and Solomon, P.D. and Low, J.K.K. and Tran, D.H. and Mouradian, K.S. and Silva, A.P.G. and Wilkinson-White, L. and Norman, A. and Franck, C. and Matthews, J.M. and Mitchell Guss, J. and Payne, R.J. and Passioura, T. and Suga, H. and Mackay, J.P.},
doi = {10.1073/pnas.2003086117},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = {43}
}
Downloads: 1
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All rights reserved. Cyclic peptide library screening technologies show immense promise for identifying drug leads and chemical probes for challenging targets. However, the structural and functional diversity encoded within such libraries is largely undefined. We have systematically profiled the affinity, selectivity, and structural features of library-derived cyclic peptides selected to recognize three closely related targets: the acetyllysine-binding bromodomain proteins BRD2, -3, and -4. We report affinities as low as 100 pM and specificities of up to 106-fold. Crystal structures of 13 peptide–bromodomain complexes reveal remarkable diversity in both structure and binding mode, including both α-helical and β-sheet structures as well as bivalent binding modes. The peptides can also exhibit a high degree of structural preorganization. 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All rights reserved. Cyclic peptide library screening technologies show immense promise for identifying drug leads and chemical probes for challenging targets. However, the structural and functional diversity encoded within such libraries is largely undefined. We have systematically profiled the affinity, selectivity, and structural features of library-derived cyclic peptides selected to recognize three closely related targets: the acetyllysine-binding bromodomain proteins BRD2, -3, and -4. We report affinities as low as 100 pM and specificities of up to 106-fold. Crystal structures of 13 peptide–bromodomain complexes reveal remarkable diversity in both structure and binding mode, including both α-helical and β-sheet structures as well as bivalent binding modes. The peptides can also exhibit a high degree of structural preorganization. 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