5GJV

Structure of the mammalian voltage-gated calcium channel Cav1.1 complex at near atomic resolution


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the voltage-gated calcium channel Cav1.1 at 3.6 angstrom resolution

Wu, J.P.Yan, Z.Li, Z.Q.Qian, X.Y.Lu, S.Dong, M.Q.Zhou, Q.Yan, N.

(2016) Nature 537: 191-196

  • DOI: 10.1038/nature19321
  • Primary Citation of Related Structures:  
  • Also Cited By: 6BYO

  • PubMed Abstract: 
  • The voltage-gated calcium (Cav) channels convert membrane electrical signals to intracellular Ca2+-mediated events. Among the ten subtypes of Cav channel in mammals, Cav1.1 is specified for the excitation-contraction coupling of skeletal muscles. Her ...

    The voltage-gated calcium (Cav) channels convert membrane electrical signals to intracellular Ca2+-mediated events. Among the ten subtypes of Cav channel in mammals, Cav1.1 is specified for the excitation-contraction coupling of skeletal muscles. Here we present the cryo-electron microscopy structure of the rabbit Cav1.1 complex at a nominal resolution of 3.6 Å. The inner gate of the ion-conducting α1-subunit is closed and all four voltage-sensing domains adopt an 'up' conformation, suggesting a potentially inactivated state. The extended extracellular loops of the pore domain, which are stabilized by multiple disulfide bonds, form a windowed dome above the selectivity filter. One side of the dome provides the docking site for the α2δ-1-subunit, while the other side may attract cations through its negative surface potential. The intracellular I-II and III-IV linker helices interact with the β1a-subunit and the carboxy-terminal domain of α1, respectively. Classification of the particles yielded two additional reconstructions that reveal pronounced displacement of β1a and adjacent elements in α1. The atomic model of the Cav1.1 complex establishes a foundation for mechanistic understanding of excitation-contraction coupling and provides a three-dimensional template for molecular interpretations of the functions and disease mechanisms of Cav and Nav channels.


    Organizational Affiliation

    State Key Laboratory of Membrane Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent L-type calcium channel subunit alpha-1S
A
1873Oryctolagus cuniculusMutation(s): 0 
Gene Names: CACNA1S (CACH1, CACNL1A3)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
CaV1.1 voltage-gated calcium channel
Find proteins for P07293 (Oryctolagus cuniculus)
Go to Gene View: CACNA1S
Go to UniProtKB:  P07293
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent L-type calcium channel subunit beta-1
B
106Oryctolagus cuniculusMutation(s): 0 
Gene Names: CACNB1 (CACNLB1)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
CaV1.1 voltage-gated calcium channel
Find proteins for P19517 (Oryctolagus cuniculus)
Go to Gene View: CACNB1
Go to UniProtKB:  P19517
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent L-type calcium channel subunit beta-1
C
199Oryctolagus cuniculusMutation(s): 0 
Gene Names: CACNB1 (CACNLB1)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
CaV1.1 voltage-gated calcium channel
Find proteins for P19517 (Oryctolagus cuniculus)
Go to Gene View: CACNB1
Go to UniProtKB:  P19517
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent calcium channel gamma-1 subunit
E
222Oryctolagus cuniculusMutation(s): 0 
Gene Names: CACNG1 (CACNLG)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
CaV1.1 voltage-gated calcium channel
Find proteins for P19518 (Oryctolagus cuniculus)
Go to Gene View: CACNG1
Go to UniProtKB:  P19518
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Voltage-dependent calcium channel subunit alpha-2/delta-1
F
1106Oryctolagus cuniculusMutation(s): 0 
Gene Names: CACNA2D1 (CACNL2A, CCHL2A)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
CaV1.1 voltage-gated calcium channel
Find proteins for P13806 (Oryctolagus cuniculus)
Go to Gene View: CACNA2D1
Go to UniProtKB:  P13806
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PC1
Query on PC1

Download SDF File 
Download CCD File 
A
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE
3-SN-PHOSPHATIDYLCHOLINE
C44 H88 N O8 P
NRJAVPSFFCBXDT-HUESYALOSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, F
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
F
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, F
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ETA
Query on ETA
F
L-peptide COOH carboxy terminusC2 H7 N O

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
the Ministry of Science and Technology of ChinaChina2015CB9101012014, ZX09507003006
National Natural Science Foundation of ChinaChina31130002 and 31125009

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release
  • Version 1.1: 2016-09-21
    Type: Database references, Other
  • Version 1.2: 2018-10-24
    Type: Data collection, Derived calculations, Other, Refinement description