4MQT

Structure of active human M2 muscarinic acetylcholine receptor bound to the agonist iperoxo and allosteric modulator LY2119620


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.255 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Activation and allosteric modulation of a muscarinic acetylcholine receptor.

Kruse, A.C.Ring, A.M.Manglik, A.Hu, J.Hu, K.Eitel, K.Hubner, H.Pardon, E.Valant, C.Sexton, P.M.Christopoulos, A.Felder, C.C.Gmeiner, P.Steyaert, J.Weis, W.I.Garcia, K.C.Wess, J.Kobilka, B.K.

(2013) Nature 504: 101-106

  • DOI: 10.1038/nature12735
  • Primary Citation of Related Structures:  
    4MQS, 4MQT

  • PubMed Abstract: 
  • Despite recent advances in crystallography and the availability of G-protein-coupled receptor (GPCR) structures, little is known about the mechanism of their activation process, as only the β2 adrenergic receptor (β2AR) and rhodopsin have been crysta ...

    Despite recent advances in crystallography and the availability of G-protein-coupled receptor (GPCR) structures, little is known about the mechanism of their activation process, as only the β2 adrenergic receptor (β2AR) and rhodopsin have been crystallized in fully active conformations. Here we report the structure of an agonist-bound, active state of the human M2 muscarinic acetylcholine receptor stabilized by a G-protein mimetic camelid antibody fragment isolated by conformational selection using yeast surface display. In addition to the expected changes in the intracellular surface, the structure reveals larger conformational changes in the extracellular region and orthosteric binding site than observed in the active states of the β2AR and rhodopsin. We also report the structure of the M2 receptor simultaneously bound to the orthosteric agonist iperoxo and the positive allosteric modulator LY2119620. This structure reveals that LY2119620 recognizes a largely pre-formed binding site in the extracellular vestibule of the iperoxo-bound receptor, inducing a slight contraction of this outer binding pocket. These structures offer important insights into the activation mechanism and allosteric modulation of muscarinic receptors.


    Organizational Affiliation

    1] Department of Molecular and Cellular Physiology, Stanford University School of Medicine, 279 Campus Drive, Stanford, California 94305, USA [2].



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Muscarinic acetylcholine receptor M2A351Homo sapiensMutation(s): 6 
Gene Names: CHRM2
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
G Protein-Coupled Receptors (GPCRs): Class A
Protein: 
M2 muscarinic acetylcholine receptor bound to the agonist iperoxo
Find proteins for P08172 (Homo sapiens)
Explore P08172 
Go to UniProtKB:  P08172
NIH Common Fund Data Resources
PHAROS  P08172
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody 9-8B125Lama glamaMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2CU
Query on 2CU

Download CCD File 
A
3-amino-5-chloro-N-cyclopropyl-4-methyl-6-[2-(4-methylpiperazin-1-yl)-2-oxoethoxy]thieno[2,3-b]pyridine-2-carboxamide
C19 H24 Cl N5 O3 S
TYTGOXSAAQWLPJ-UHFFFAOYSA-N
 Ligand Interaction
IXO
Query on IXO

Download CCD File 
A
4-(4,5-dihydro-1,2-oxazol-3-yloxy)-N,N,N-trimethylbut-2-yn-1-aminium
C10 H17 N2 O2
WXXOCGISBCTWPW-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IXOEC50:  0.07999999821186066   nM  BindingDB
IXOKi:  8.699999809265137   nM  BindingDB
IXOKi:  257   nM  BindingDB
IXOEC50:  0.17000000178813934   nM  BindingDB
IXOKi:  2.5   nM  BindingDB
IXOKi:  10   nM  BindingDB
IXOEC50:  0.2800000011920929   nM  BindingDB
IXOKi:  4.900000095367432   nM  BindingDB
IXOKi:  2.200000047683716   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.255 
  • Space Group: P 21 21 21
  • Diffraction Data DOI: 10.15785/SBGRID/125 SBGrid
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.032α = 90
b = 77.399β = 90
c = 163.822γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-27
    Type: Initial release
  • Version 1.1: 2013-12-04
    Changes: Database references
  • Version 1.2: 2013-12-18
    Changes: Database references
  • Version 1.3: 2017-07-05
    Changes: Source and taxonomy
  • Version 1.4: 2019-05-01
    Changes: Data collection, Structure summary