ISDA

Entry Detail

PDB ID:

8AX5

Keywords:

MEMBRANE PROTEIN

Title:

Crystal structure of a CGRP receptor ectodomain heterodimer bound to macrocyclic inhibitor HTL0029881

Biological Source:

Source Organism:

Escherichia coli K-12, Homo sapiens

Host Organism:

Homo sapiens

PDB Version:

Deposition Date:

2022-08-30

Release Date:

2022-12-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.75 Å

R-Value Free:

0.27

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Maltose/maltodextrin-binding periplasmic protein,Receptor activity-modifying protein 1,Calcitonin gene-related peptide type 1 receptor
Chain IDs:A
Chain Length:593
Number of Molecules:1
Biological Source:Escherichia coli K-12, Homo sapiens

UniProt ID:P0AEX9 Pfam ID:PF01547

Ligand Molecules

OKU

PG4

Peptide-like Molecules

PRD_900001

Primary Citation

Novel Macrocyclic Antagonists of the CGRP Receptor Part 2: Stereochemical Inversion Induces an Unprecedented Binding Mode.

Southall, S.M, Banerjee, J, Brown, J, Butkovic, K, Cansfield, A.D, Cansfield, J.E, Congreve, M.S, Cseke, G, Deflorian, F, Hunjadi, M.P, Hutinec, A, Inturi, T.K, Rupcic, R, Saxty, G, Watson, S.P.Show

Acs Med.Chem.Lett. 13 1776 1782 (2022)

PMID: 36385934 DOI: 10.1021/acsmedchemlett.2c00400

Abstact

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.

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Primary Citation of related structures