5CXV

Structure of the human M1 muscarinic acetylcholine receptor bound to antagonist Tiotropium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.234 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structures of the M1 and M4 muscarinic acetylcholine receptors.

Thal, D.M.Sun, B.Feng, D.Nawaratne, V.Leach, K.Felder, C.C.Bures, M.G.Evans, D.A.Weis, W.I.Bachhawat, P.Kobilka, T.S.Sexton, P.M.Kobilka, B.K.Christopoulos, A.

(2016) Nature 531: 335-340

  • DOI: 10.1038/nature17188
  • Primary Citation of Related Structures:  
    5CXV, 5DSG

  • PubMed Abstract: 
  • Muscarinic M1-M5 acetylcholine receptors are G-protein-coupled receptors that regulate many vital functions of the central and peripheral nervous systems. In particular, the M1 and M4 receptor subtypes have emerged as attractive drug targets for treatments of neurological disorders, such as Alzheimer's disease and schizophrenia, but the high conservation of the acetylcholine-binding pocket has spurred current research into targeting allosteric sites on these receptors ...

    Muscarinic M1-M5 acetylcholine receptors are G-protein-coupled receptors that regulate many vital functions of the central and peripheral nervous systems. In particular, the M1 and M4 receptor subtypes have emerged as attractive drug targets for treatments of neurological disorders, such as Alzheimer's disease and schizophrenia, but the high conservation of the acetylcholine-binding pocket has spurred current research into targeting allosteric sites on these receptors. Here we report the crystal structures of the M1 and M4 muscarinic receptors bound to the inverse agonist, tiotropium. Comparison of these structures with each other, as well as with the previously reported M2 and M3 receptor structures, reveals differences in the orthosteric and allosteric binding sites that contribute to a role in drug selectivity at this important receptor family. We also report identification of a cluster of residues that form a network linking the orthosteric and allosteric sites of the M4 receptor, which provides new insight into how allosteric modulation may be transmitted between the two spatially distinct domains.


    Organizational Affiliation

    Drug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Muscarinic acetylcholine receptor M1,Endolysin,Muscarinic acetylcholine receptor M1A515Homo sapiensEscherichia virus T4Mutation(s): 7 
Gene Names: CHRM1E
EC: 3.2.1.17
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P11229 (Homo sapiens)
Explore P11229 
Go to UniProtKB:  P11229
PHAROS:  P11229
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP11229P00720
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FLAG peptideB [auth C]7Escherichia virus T4Mutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Y01
Query on Y01

Download Ideal Coordinates CCD File 
D [auth A]CHOLESTEROL HEMISUCCINATE
C31 H50 O4
WLNARFZDISHUGS-MIXBDBMTSA-N
 Ligand Interaction
0HK
Query on 0HK

Download Ideal Coordinates CCD File 
C [auth A](1R,2R,4S,5S,7S)-7-{[hydroxy(dithiophen-2-yl)acetyl]oxy}-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.0~2,4~]nonane
C19 H22 N O4 S2
LERNTVKEWCAPOY-DZZGSBJMSA-N
 Ligand Interaction
PGE
Query on PGE

Download Ideal Coordinates CCD File 
F [auth A]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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H [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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E [auth A],
G [auth A],
I [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.053α = 90
b = 72.186β = 90
c = 175.688γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-09
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references
  • Version 1.2: 2016-03-30
    Changes: Atomic model