9AVU

Bovine fetal muscle nAChR bound to ACh

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Bos taurus
  • Mutation(s): No 
  • Membrane Protein: Yes  PDBTMMemProtMD

  • Deposited: 2024-03-05 Released: 2024-07-31 
  • Deposition Author(s): Li, H., Hibbs, R.E.
  • Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.45 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural switch in acetylcholine receptors in developing muscle.

Li, H.Teng, J.Hibbs, R.E.

(2024) Nature 632: 1174-1180

  • DOI: https://doi.org/10.1038/s41586-024-07774-6
  • Primary Citation of Related Structures:  
    9AVU, 9AVV, 9AWJ, 9AWK

  • PubMed Abstract: 

    During development, motor neurons originating in the brainstem and spinal cord form elaborate synapses with skeletal muscle fibres 1 . These neurons release acetylcholine (ACh), which binds to nicotinic ACh receptors (AChRs) on the muscle, initiating contraction. Two types of AChR are present in developing muscle cells, and their differential expression serves as a hallmark of neuromuscular synapse maturation 2-4 . The structural principles underlying the switch from fetal to adult muscle receptors are unknown. Here, we present high-resolution structures of both fetal and adult muscle nicotinic AChRs, isolated from bovine skeletal muscle in developmental transition. These structures, obtained in the absence and presence of ACh, provide a structural context for understanding how fetal versus adult receptor isoforms are tuned for synapse development versus the all-or-none signalling required for high-fidelity skeletal muscle contraction. We find that ACh affinity differences are driven by binding site access, channel conductance is tuned by widespread surface electrostatics and open duration changes result from intrasubunit interactions and structural flexibility. The structures further reveal pathogenic mechanisms underlying congenital myasthenic syndromes.


  • Organizational Affiliation

    Department of Neurobiology, University of California San Diego, La Jolla, CA, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Acetylcholine receptor subunit alpha
A, C
437Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P02709 (Bos taurus)
Explore P02709 
Go to UniProtKB:  P02709
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02709
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Acetylcholine receptor subunit betaB [auth E]481Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P04758 (Bos taurus)
Explore P04758 
Go to UniProtKB:  P04758
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04758
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Acetylcholine receptor subunit delta495Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P04759 (Bos taurus)
Explore P04759 
Go to UniProtKB:  P04759
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04759
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Acetylcholine receptor subunit gammaE [auth B]497Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P13536 (Bos taurus)
Explore P13536 
Go to UniProtKB:  P13536
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13536
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 5
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF [auth H]10N-Glycosylation
Glycosylation Resources
GlyTouCan:  G89864BN
GlyCosmos:  G89864BN
GlyGen:  G89864BN
Entity ID: 6
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseG [auth I],
K [auth L]
4N-Glycosylation
Glycosylation Resources
GlyTouCan:  G22573RC
GlyCosmos:  G22573RC
GlyGen:  G22573RC
Entity ID: 7
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseH [auth J]9N/A
Glycosylation Resources
GlyTouCan:  G83161QT
GlyCosmos:  G83161QT
GlyGen:  G83161QT
Entity ID: 8
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseI [auth K]7N-Glycosylation
Glycosylation Resources
GlyTouCan:  G07617FP
GlyCosmos:  G07617FP
GlyGen:  G07617FP
Entity ID: 9
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseJ [auth F],
L [auth M]
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.45 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2024-07-31
    Type: Initial release
  • Version 1.1: 2024-08-14
    Changes: Data collection, Database references
  • Version 1.2: 2024-09-11
    Changes: Data collection, Database references
  • Version 1.3: 2024-09-18
    Changes: Data collection, Database references
  • Version 1.4: 2024-10-09
    Changes: Data collection, Structure summary