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Title | Structural insight into selectivity of amylin and calcitonin receptor agonists. |
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Journal, issue, pages | Nat Chem Biol, Vol. 20, Issue 2, Page 162-169, Year 2024 |
Publish date | Aug 3, 2023 |
![]() | Jianjun Cao / Matthew J Belousoff / Elliot Gerrard / Radostin Danev / Madeleine M Fletcher / Emma Dal Maso / Herman Schreuder / Katrin Lorenz / Andreas Evers / Garima Tiwari / Melissa Besenius / Ziyu Li / Rachel M Johnson / Denise Wootten / Patrick M Sexton / ![]() ![]() ![]() ![]() ![]() |
PubMed Abstract | Amylin receptors (AMYRs), heterodimers of the calcitonin receptor (CTR) and one of three receptor activity-modifying proteins, are promising obesity targets. A hallmark of AMYR activation by Amy is ...Amylin receptors (AMYRs), heterodimers of the calcitonin receptor (CTR) and one of three receptor activity-modifying proteins, are promising obesity targets. A hallmark of AMYR activation by Amy is the formation of a 'bypass' secondary structural motif (residues S19-P25). This study explored potential tuning of peptide selectivity through modification to residues 19-22, resulting in a selective AMYR agonist, San385, as well as nonselective dual amylin and calcitonin receptor agonists (DACRAs), with San45 being an exemplar. We determined the structure and dynamics of San385-bound AMYR, and San45 bound to AMYR or CTR. San45, via its conjugated lipid at position 21, was anchored at the edge of the receptor bundle, enabling a stable, alternative binding mode when bound to the CTR, in addition to the bypass mode of binding to AMYR. Targeted lipid modification may provide a single intervention strategy for design of long-acting, nonselective, Amy-based DACRAs with potential anti-obesity effects. |
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Methods | EM (single particle) |
Resolution | 1.9 - 2.2 Å |
Structure data | EMDB-28758, PDB-8f0j: EMDB-28759, PDB-8f0k: EMDB-28810, PDB-8f2a: EMDB-28812, PDB-8f2b: |
Chemicals | ![]() ChemComp-D6M: ![]() ChemComp-NAG: ![]() ChemComp-PTY: ![]() ChemComp-PLM: ![]() ChemComp-Y01: ![]() ChemComp-P42: ![]() ChemComp-HOH: |
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