7P0I

Crystal structure of a CGRP receptor ectodomain heterodimer bound to macrocyclic inhibitor Compound 13

• PDB DOI: https://doi.org/10.2210/pdb7P0I/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli K-12, Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2021-06-29 Released: 2022-06-15 
• Deposition Author(s): Southall, S.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.251 
• R-Value Work: 0.197 
• R-Value Observed: 0.200 

Starting Model: experimental

Literature

Novel Macrocyclic Antagonists of the Calcitonin Gene-Related Peptide Receptor: Design, Realization, and Structural Characterization of Protein-Ligand Complexes.

Cansfield, A.D., Ator, M.A., Banerjee, J., Bestwick, M., Bortolato, A., Brown, G.A., Brown, J., Butkovic, K., Cansfield, J.E., Christopher, J.A., Congreve, M., Cseke, G., Deflorian, F., Dugan, B., Hunjadi, M.P., Hutinec, A., Inturi, T.K., Landek, G., Mason, J., O'Brien, A., Ott, G.R., Rupcic, R., Saxty, G., Southall, S.M., Zadravec, R., Watson, S.P.

(2022) ACS Chem Neurosci 13: 751-765

• PubMed: 35245037 
• DOI: https://doi.org/10.1021/acschemneuro.1c00696
• Primary Citation of Related Structures:  
  7P0F, 7P0I


• PubMed Abstract: 
  

  A series of macrocyclic calcitonin gene-related peptide (CGRP) receptor antagonists identified using structure-based design principles, exemplified by HTL0028016 ( 1 ) and HTL0028125 ( 2 ), is described. Structural characterization by X-ray crystallography of the interaction of two of the macrocycle antagonists with the CGRP receptor ectodomain is described, along with structure-activity relationships associated with point changes to the macrocyclic antagonists. The identification of non-peptidic/natural product-derived, macrocyclic ligands for a G protein coupled receptor (GPCR) is noteworthy.

---

Organizational Affiliation: 

Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge CB21 6DG, U.K.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 67.7 kDa 
• Atom Count: 4,853 
• Modelled Residue Count: 571 
• Deposited Residue Count: 594 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Maltose/maltodextrin-binding periplasmic protein,Receptor activity-modifying protein 1,Calcitonin gene-related peptide type 1 receptor	A	594	Escherichia coli K-12, Homo sapiens	Mutation(s): 0  Gene Names: malE, b4034, JW3994, RAMP1, CALCRL, CGRPR
UniProt & NIH Common Fund Data Resources
Find proteins for P0AEX9 (Escherichia coli (strain K12)) Explore P0AEX9  Go to UniProtKB:  P0AEX9
Find proteins for O60894 (Homo sapiens) Explore O60894  Go to UniProtKB:  O60894
PHAROS:  O60894 GTEx:  ENSG00000132329
Find proteins for Q16602 (Homo sapiens) Explore Q16602  Go to UniProtKB:  Q16602
PHAROS:  Q16602 GTEx:  ENSG00000064989
UniProt Groups	P0AEX9Q16602O60894

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose	B	2		N/A
Glycosylation Resources
GlyTouCan:  G07411ON GlyCosmos:  G07411ON

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
7IU (Subject of Investigation/LOI)	E [auth A]	(1S,20E)-10-(benzofuran-3-ylmethyl)-12-methyl-15,18-dioxa-5,9,12,24,26-pentazapentacyclo[20.5.2.11,4.13,7.025,28]hentriaconta-3(30),4,6,20,22(29),23,25(28)-heptaene-8,11,27-trione C34 H33 N5 O6 RETFPWRXLRKPLP-INILNPPNSA-N
PG4	C [auth A], D [auth A]	TETRAETHYLENE GLYCOL C8 H18 O5 UWHCKJMYHZGTIT-UHFFFAOYSA-N

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900001	B	alpha-maltose	Oligosaccharide / Nutrient

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.251 
• R-Value Work: 0.197 
• R-Value Observed: 0.200 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.195	α = 90
b = 77.633	β = 90
c = 97.983	γ = 90

Software Package:

Software Name	Purpose
Aimless	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2022-06-15 
Deposition Author(s): Southall, S.M.

Revision History  

• Version 1.0: 2022-06-15
  Type: Initial release
  
• Version 1.1: 2024-01-31
  Changes: Data collection, Refinement description
• Version 1.2: 2024-11-20
  Changes: Structure summary