5II0

Crystal structure of the human calcitonin receptor ectodomain in complex with a truncated salmon calcitonin analogue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.097 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Type II Turn of Receptor-bound Salmon Calcitonin Revealed by X-ray Crystallography.

Johansson, E.Hansen, J.L.Hansen, A.M.Shaw, A.C.Becker, P.Schaffer, L.Reedtz-Runge, S.

(2016) J.Biol.Chem. 291: 13689-13698

  • DOI: 10.1074/jbc.M116.726034

  • PubMed Abstract: 
  • Calcitonin is a peptide hormone consisting of 32 amino acid residues and the calcitonin receptor is a Class B G protein-coupled receptor (GPCR). The crystal structure of the human calcitonin receptor ectodomain (CTR ECD) in complex with a truncated a ...

    Calcitonin is a peptide hormone consisting of 32 amino acid residues and the calcitonin receptor is a Class B G protein-coupled receptor (GPCR). The crystal structure of the human calcitonin receptor ectodomain (CTR ECD) in complex with a truncated analogue of salmon calcitonin ([BrPhe(22)]sCT(8-32)) has been determined to 2.1-Å resolution. Parallel analysis of a series of peptide ligands showed that the rank order of binding of the CTR ECD is identical to the rank order of binding of the full-length CTR, confirming the structural integrity and relevance of the isolated CTR ECD. The structure of the CTR ECD is similar to other Class B GPCRs and the ligand binding site is similar to the binding site of the homologous receptors for the calcitonin gene-related peptide (CGRP) and adrenomedulin (AM) recently published (Booe, J. M., Walker, C. S., Barwell, J., Kuteyi, G., Simms, J., Jamaluddin, M. A., Warner, M. L., Bill, R. M., Harris, P. W., Brimble, M. A., Poyner, D. R., Hay, D. L., and Pioszak, A. A. (2015) Mol. Cell 58, 1040-1052). Interestingly the receptor-bound structure of the ligand [BrPhe(22)]sCT(8-32) differs from the receptor-bound structure of the homologous ligands CGRP and AM. They all adopt an extended conformation followed by a C-terminal β turn, however, [BrPhe(22)]sCT(8-32) adopts a type II turn (Gly(28)-Thr(31)), whereas CGRP and AM adopt type I turns. Our results suggest that a type II turn is the preferred conformation of calcitonin, whereas a type I turn is the preferred conformation of peptides that require RAMPs; CGRP, AM, and amylin. In addition the structure provides a detailed molecular explanation and hypothesis regarding ligand binding properties of CTR and the amylin receptors.


    Organizational Affiliation

    From Novo Nordisk A/S, Novo Nordisk Park, DK-2760 Måløv, Denmark evjh@novonordisk.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcitonin receptor
A, B, C
122Homo sapiensMutation(s): 0 
Gene Names: CALCR
Find proteins for P30988 (Homo sapiens)
Go to Gene View: CALCR
Go to UniProtKB:  P30988
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Calcitonin
D, E, F
25Oncorhynchus gorbuschaMutation(s): 0 
Gene Names: CT
Find proteins for Q91970 (Oncorhynchus gorbuscha)
Go to UniProtKB:  Q91970
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
URE
Query on URE

Download SDF File 
Download CCD File 
F
UREA
C H4 N2 O
XSQUKJJJFZCRTK-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
LPD
Query on LPD
D, E, F
L-PEPTIDE LINKINGC5 H10 N2 OPRO
4BF
Query on 4BF
D, E, F
L-PEPTIDE LINKINGC9 H10 Br N O2TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.097 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 96.558α = 90.00
b = 113.165β = 114.79
c = 55.424γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-05-11
    Type: Initial release
  • Version 1.1: 2016-06-01
    Type: Database references
  • Version 1.2: 2016-07-06
    Type: Database references