8ax6

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Crystal structure of a CGRP receptor ectodomain heterodimer bound to macrocyclic inhibitor HTL0029882

Structural highlights

8ax6 is a 1 chain structure with sequence from Escherichia coli K-12 and Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.9Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

MALE_ECOLI Involved in the high-affinity maltose membrane transport system MalEFGK. Initial receptor for the active transport of and chemotaxis toward maltooligosaccharides.RAMP1_HUMAN Transports the calcitonin gene-related peptide type 1 receptor (CALCRL) to the plasma membrane. Acts as a receptor for calcitonin-gene-related peptide (CGRP) together with CALCRL.^[1] CALRL_HUMAN Receptor for calcitonin-gene-related peptide (CGRP) together with RAMP1 and receptor for adrenomedullin together with RAMP3 (By similarity). Receptor for adrenomedullin together with RAMP2. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase.^[2]

Publication Abstract from PubMed

The diastereomeric macrocyclic calcitonin gene-related peptide (CGRP) antagonists HTL0029881 (3) and HTL0029882 (4), in which the stereochemistry of a spiro center is reversed, surprisingly demonstrate comparable potency. X-ray crystallographic characterization demonstrates that 3 binds to the CGRP receptor in a precedented manner but that 4 binds in an unprecedented, unexpected, and radically different manner. The observation of this phenomenon is noteworthy and may open novel avenues for CGRP receptor antagonist design.

Novel Macrocyclic Antagonists of the CGRP Receptor Part 2: Stereochemical Inversion Induces an Unprecedented Binding Mode.,Southall SM, Banerjee J, Brown J, Butkovic K, Cansfield AD, Cansfield JE, Congreve MS, Cseke G, Deflorian F, Hunjadi MP, Hutinec A, Inturi TK, Rupcic R, Saxty G, Watson SP ACS Med Chem Lett. 2022 Oct 19;13(11):1776-1782. doi: , 10.1021/acsmedchemlett.2c00400. eCollection 2022 Nov 10. PMID:36385934^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ McLatchie LM, Fraser NJ, Main MJ, Wise A, Brown J, Thompson N, Solari R, Lee MG, Foord SM. RAMPs regulate the transport and ligand specificity of the calcitonin-receptor-like receptor. Nature. 1998 May 28;393(6683):333-9. PMID:9620797 doi:10.1038/30666
↑ Kusano S, Kukimoto-Niino M, Hino N, Ohsawa N, Okuda K, Sakamoto K, Shirouzu M, Shindo T, Yokoyama S. Structural basis for extracellular interactions between calcitonin receptor-like receptor and receptor activity-modifying protein 2 for adrenomedullin-specific binding. Protein Sci. 2012 Feb;21(2):199-210. doi: 10.1002/pro.2003. Epub 2011 Dec 28. PMID:22102369 doi:10.1002/pro.2003
↑ Southall SM, Banerjee J, Brown J, Butkovic K, Cansfield AD, Cansfield JE, Congreve MS, Cseke G, Deflorian F, Hunjadi MP, Hutinec A, Inturi TK, Rupcic R, Saxty G, Watson SP. Novel Macrocyclic Antagonists of the CGRP Receptor Part 2: Stereochemical Inversion Induces an Unprecedented Binding Mode. ACS Med Chem Lett. 2022 Oct 19;13(11):1776-1782. doi: , 10.1021/acsmedchemlett.2c00400. eCollection 2022 Nov 10. PMID:36385934 doi:http://dx.doi.org/10.1021/acsmedchemlett.2c00400