5T04

STRUCTURE OF CONSTITUTIVELY ACTIVE NEUROTENSIN RECEPTOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure and dynamics of a constitutively active neurotensin receptor.

Krumm, B.E.Lee, S.Bhattacharya, S.Botos, I.White, C.F.Du, H.Vaidehi, N.Grisshammer, R.

(2016) Sci Rep 6: 38564-38564

  • DOI: 10.1038/srep38564

  • PubMed Abstract: 
  • Many G protein-coupled receptors show constitutive activity, resulting in the production of a second messenger in the absence of an agonist; and naturally occurring constitutively active mutations in receptors have been implicated in diseases. To gai ...

    Many G protein-coupled receptors show constitutive activity, resulting in the production of a second messenger in the absence of an agonist; and naturally occurring constitutively active mutations in receptors have been implicated in diseases. To gain insight into mechanistic aspects of constitutive activity, we report here the 3.3 Å crystal structure of a constitutively active, agonist-bound neurotensin receptor (NTSR1) and molecular dynamics simulations of agonist-occupied and ligand-free receptor. Comparison with the structure of a NTSR1 variant that has little constitutive activity reveals uncoupling of the ligand-binding domain from conserved connector residues, that effect conformational changes during GPCR activation. Furthermore, molecular dynamics simulations show strong contacts between connector residue side chains and increased flexibility at the intracellular receptor face as features that coincide with robust signalling in cells. The loss of correlation between the binding pocket and conserved connector residues, combined with altered receptor dynamics, possibly explains the reduced neurotensin efficacy in the constitutively active NTSR1 and a facilitated initial engagement with G protein in the absence of agonist.


    Organizational Affiliation

    Membrane Protein Structure Function Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Department of Health and Human Services, Rockville, Maryland 20852, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neurotensin receptor type 1,Endolysin,Neurotensin receptor type 1
A
513Rattus norvegicusEnterobacteria phage T4
This entity is chimeric
Gene Names: Ntsr1 (Ntsr), E
EC: 3.2.1.17
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
NTS1 neurotensin receptor in complex with neurotensin
Find proteins for P20789 (Rattus norvegicus)
Go to UniProtKB:  P20789
Find proteins for P00720 (Enterobacteria phage T4)
Go to UniProtKB:  P00720
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ARG-ARG-PRO-TYR-ILE-LEU
B
6Rattus norvegicusGene Names: Nts
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs)
Protein: 
NTS1 neurotensin receptor in complex with neurotensin
Find proteins for P20068 (Rattus norvegicus)
Go to UniProtKB:  P20068
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
TCE
Query on TCE

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Download CCD File 
A
3,3',3''-phosphanetriyltripropanoic acid
3-[bis(2-carboxyethyl)phosphanyl]propanoic acid
C9 H15 O6 P
PZBFGYYEXUXCOF-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.253 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.190α = 90.00
b = 75.710β = 90.00
c = 83.200γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-12-21
    Type: Initial release