Evidence map›Paper›PMID 26958838›Full record

ArticleNature2016

Crystal structures of the M1 and M4 muscarinic acetylcholine receptors.

David M Thal, Bingfa Sun, Dan Feng, Vindhya Nawaratne, Katie Leach, Christian C Felder, Mark G Bures, David A Evans, William I Weis, Priti Bachhawat and 4 more

Open access · greenAbstract readComparative Study
In one paragraph

Article in Nature, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 168 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
168citing papers in PubMed, 2 pooled it
24.7field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

168 citing papers in PubMed, 2 syntheses or guidelines pooled it, 343 citations in OpenAlex.

  1. Pooled it
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  14. De novo design of a fusion protein tool for GPCR research.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  15. Article
  16. Visualizing agonist-induced M2 receptor activation regulated by aromatic ring dynamics.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  17. Review
  18. Article
  19. Entropy drives the ligand recognition in G-protein-coupled receptor subtypes.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  20. Allosteric modulators of MScientific reports · 2024
    Article

108 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 5 institutions in 3 countries.

David M ThalDrug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.
Bingfa SunConfometRx, 3070 Kenneth Street, Santa Clara, California 95054, USA.
Dan FengConfometRx, 3070 Kenneth Street, Santa Clara, California 95054, USA.
Vindhya NawaratneDrug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.
Katie LeachDrug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.
Christian C FelderNeuroscience, Eli Lilly, Indianapolis, Indiana 46285, USA.
Mark G BuresComputational Chemistry and Chemoinformatics, Eli Lilly, Indianapolis, Indiana 46285, USA.
David A EvansComputational Chemistry and Chemoinformatics, Eli Lilly, Sunninghill Road, Windlesham GU20 6PH, UK.
William I WeisDepartment of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California 94305, USA.
Priti BachhawatConfometRx, 3070 Kenneth Street, Santa Clara, California 95054, USA.
Tong Sun KobilkaConfometRx, 3070 Kenneth Street, Santa Clara, California 95054, USA.
Patrick M SextonDrug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.
Brian K KobilkaConfometRx, 3070 Kenneth Street, Santa Clara, California 95054, USA.
Arthur ChristopoulosDrug Discovery Biology and Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia.
Monash University · AUConfometRx (United States) · USEli Lilly (United States) · USStanford University · USEli Lilly (United Kingdom) · GB

Funding

Structure-based discovery of allosteric ligands for G Protein Coupled ReceptorsU19GM106990 · NIGMS · STANFORD UNIVERSITY · PI KOBILKA, BRIAN K · 2013 to 2017
$6.3M
NCI NIH HHS Y1-CO-1020NIGMS NIH HHS U19 GM106990NIGMS NIH HHS Y1-GM-1104
6 · The paper itself

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. 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.

Indexed as

AcetylcholineAllosteric RegulationAllosteric SiteAlzheimer DiseaseCrystallizationCrystallography, X-RayDrug Inverse AgonismHumansModels, MolecularNicotinic AcidsReceptor, Muscarinic M1Receptor, Muscarinic M4SchizophreniaStatic ElectricitySubstrate SpecificitySurface Properties3-amino-5-chloro-6-methoxy-4-methyl-thieno(2,3-b)pyridine-2-carboxylic acid cyclopropylamideAcetylcholineNicotinic AcidsReceptor, Muscarinic M1Receptor, Muscarinic M4ThiophenesTiotropium Bromide

Identifiers

PMID26958838
PMCPMC4915387
OpenAlexW2295245722

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.