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- PDB-5gjw: Structure of the mammalian voltage-gated calcium channel Cav1.1 c... -

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Entry
Database: PDB / ID: 5gjw
TitleStructure of the mammalian voltage-gated calcium channel Cav1.1 complex for ClassII map
Components
  • (Voltage-dependent L-type calcium channel subunit beta- ...) x 2
  • (Voltage-dependent calcium channel ...Voltage-gated calcium channel) x 2
  • Voltage-dependent L-type calcium channel subunit alpha-1S
KeywordsMEMBRANE PROTEIN / complex / channel
Function / homology
Function and homology information


positive regulation of muscle contraction / L-type voltage-gated calcium channel complex / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / cellular response to caffeine / calcium ion import across plasma membrane / calcium channel regulator activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / regulation of ryanodine-sensitive calcium-release channel activity / T-tubule ...positive regulation of muscle contraction / L-type voltage-gated calcium channel complex / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / cellular response to caffeine / calcium ion import across plasma membrane / calcium channel regulator activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / regulation of ryanodine-sensitive calcium-release channel activity / T-tubule / muscle contraction / calcium ion transmembrane transport / sarcolemma / calcium channel activity / transmembrane transporter binding / calmodulin binding / metal ion binding / plasma membrane
Similarity search - Function
Butyryl-CoA Dehydrogenase, subunit A; domain 3 - #150 / von Willebrand factor type A domain / Voltage-dependent calcium channel, L-type, beta-1 subunit / Voltage-dependent calcium channel, gamma-1 subunit / Voltage-dependent calcium channel, L-type, alpha-1S subunit / PMP-22/EMP/MP20/Claudin tight junction / Voltage-dependent L-type calcium channel subunit beta-1-4, N-terminal A domain / Voltage-dependent calcium channel, L-type, beta subunit / Voltage gated calcium channel subunit beta domain 4Aa N terminal / Voltage-gated calcium channel subunit alpha, C-terminal ...Butyryl-CoA Dehydrogenase, subunit A; domain 3 - #150 / von Willebrand factor type A domain / Voltage-dependent calcium channel, L-type, beta-1 subunit / Voltage-dependent calcium channel, gamma-1 subunit / Voltage-dependent calcium channel, L-type, alpha-1S subunit / PMP-22/EMP/MP20/Claudin tight junction / Voltage-dependent L-type calcium channel subunit beta-1-4, N-terminal A domain / Voltage-dependent calcium channel, L-type, beta subunit / Voltage gated calcium channel subunit beta domain 4Aa N terminal / Voltage-gated calcium channel subunit alpha, C-terminal / Voltage-gated calcium channel subunit alpha, C-term / Voltage-dependent calcium channel, L-type, alpha-1 subunit / VWA N-terminal / Voltage-dependent calcium channel, alpha-2/delta subunit, conserved region / VWA N-terminal / Neuronal voltage-dependent calcium channel alpha 2acd / Voltage-dependent calcium channel, alpha-1 subunit, IQ domain / Voltage gated calcium channel IQ domain / Voltage gated calcium channel IQ domain / Voltage-dependent calcium channel, alpha-1 subunit / Voltage-dependent L-type calcium channel, IQ-associated domain / Voltage-dependent L-type calcium channel, IQ-associated / Voltage-dependent calcium channel, gamma subunit / PMP-22/EMP/MP20/Claudin superfamily / Guanylate kinase/L-type calcium channel beta subunit / Guanylate kinase / Guanylate kinase homologues. / Butyryl-CoA Dehydrogenase, subunit A; domain 3 / von Willebrand factor type A domain / SH3 Domains / von Willebrand factor (vWF) type A domain / Voltage-dependent channel domain superfamily / VWFA domain profile. / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / SH3 type barrels. / SH3-like domain superfamily / Ion transport domain / Ion transport protein / Src homology 3 (SH3) domain profile. / SH3 domain / P-loop containing nucleotide triphosphate hydrolases / Roll / Up-down Bundle / P-loop containing nucleoside triphosphate hydrolase / Rossmann fold / 3-Layer(aba) Sandwich / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
triacetyl-beta-chitotriose / Voltage-dependent L-type calcium channel subunit alpha-1S / Voltage-dependent calcium channel subunit alpha-2/delta-1 / Voltage-dependent L-type calcium channel subunit beta-1 / Voltage-dependent calcium channel gamma-1 subunit
Similarity search - Component
Biological speciesOryctolagus cuniculus (rabbit)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsWu, J.P. / Yan, Z. / Li, Z.Q. / Zhou, Q. / Yan, N.
Funding support China, 2items
OrganizationGrant numberCountry
the Ministry of Science and Technology of China2015CB9101012014, ZX09507003006 China
National Natural Science Foundation of Chinaprojects 31130002 and 31125009 China
CitationJournal: Nature / Year: 2016
Title: Structure of the voltage-gated calcium channel Ca(v)1.1 at 3.6 Å resolution.
Authors: Jianping Wu / Zhen Yan / Zhangqiang Li / Xingyang Qian / Shan Lu / Mengqiu Dong / Qiang Zhou / Nieng Yan /
Abstract: The voltage-gated calcium (Ca) channels convert membrane electrical signals to intracellular Ca-mediated events. Among the ten subtypes of Ca channel in mammals, Ca1.1 is specified for the excitation- ...The voltage-gated calcium (Ca) channels convert membrane electrical signals to intracellular Ca-mediated events. Among the ten subtypes of Ca channel in mammals, Ca1.1 is specified for the excitation-contraction coupling of skeletal muscles. Here we present the cryo-electron microscopy structure of the rabbit Ca1.1 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 β-subunit and the carboxy-terminal domain of α1, respectively. Classification of the particles yielded two additional reconstructions that reveal pronounced displacement of β and adjacent elements in α1. The atomic model of the Ca1.1 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 Ca and Na channels.
History
DepositionJul 2, 2016Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 14, 2016Provider: repository / Type: Initial release
Revision 1.1Sep 21, 2016Group: Database references / Other
Revision 1.2Oct 9, 2019Group: Data collection / Other / Category: atom_sites / cell / em_software
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.length_a / _cell.length_b / _cell.length_c / _em_software.name
Revision 1.3Nov 6, 2019Group: Data collection / Database references / Category: pdbx_database_related / Item: _pdbx_database_related.content_type
Revision 1.4Dec 11, 2019Group: Experimental preparation / Category: em_sample_support / Item: _em_sample_support.grid_type
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / em_entity_assembly / entity / entity_name_com / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_molecule_features / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _em_entity_assembly.entity_id_list / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 3.0Nov 15, 2023Group: Atomic model / Data collection ...Atomic model / Data collection / Database references / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / chem_comp_atom / chem_comp_bond / database_2 / struct_conn
Item: _atom_site.auth_atom_id / _atom_site.label_atom_id ..._atom_site.auth_atom_id / _atom_site.label_atom_id / _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_leaving_atom_flag

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Structure visualization

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Assembly

Deposited unit
A: Voltage-dependent L-type calcium channel subunit alpha-1S
B: Voltage-dependent L-type calcium channel subunit beta-1
C: Voltage-dependent L-type calcium channel subunit beta-1
E: Voltage-dependent calcium channel gamma-1 subunit
F: Voltage-dependent calcium channel subunit alpha-2/delta-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)402,19923
Polymers396,8105
Non-polymers5,38818
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area16800 Å2
ΔGint-30 kcal/mol
Surface area136020 Å2

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Components

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Voltage-dependent L-type calcium channel subunit beta- ... , 2 types, 2 molecules BC

#2: Protein Voltage-dependent L-type calcium channel subunit beta-1 / CAB1 / Calcium channel voltage-dependent subunit beta 1


Mass: 11974.729 Da / Num. of mol.: 1 / Fragment: UNP residues 80-174
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Oryctolagus cuniculus (rabbit) / Gene: CACNB1, CACNLB1 / Plasmid: PGEX-4T-2 / Production host: Escherichia coli (E. coli) / References: UniProt: P19517
#3: Protein Voltage-dependent L-type calcium channel subunit beta-1 / CAB1 / Calcium channel voltage-dependent subunit beta 1


Mass: 22356.846 Da / Num. of mol.: 1 / Fragment: UNP residues 265-463
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Oryctolagus cuniculus (rabbit) / Gene: CACNB1, CACNLB1 / Plasmid: PGEX-4T-2 / Production host: Escherichia coli (E. coli) / References: UniProt: P19517

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Voltage-dependent calcium channel ... , 2 types, 2 molecules EF

#4: Protein Voltage-dependent calcium channel gamma-1 subunit / Dihydropyridine-sensitive L-type / skeletal muscle calcium channel subunit gamma


Mass: 25082.254 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: P19518
#5: Protein Voltage-dependent calcium channel subunit alpha-2/delta-1 / Voltage-gated calcium channel / Voltage-gated calcium channel subunit alpha-2/delta-1


Mass: 125156.000 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: P13806

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Protein / Non-polymers , 2 types, 4 molecules A

#10: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Ca
#1: Protein Voltage-dependent L-type calcium channel subunit alpha-1S / Calcium channel / L type / alpha-1 polypeptide / isoform 3 / skeletal muscle / Voltage-gated ...Calcium channel / L type / alpha-1 polypeptide / isoform 3 / skeletal muscle / Voltage-gated calcium channel subunit alpha Cav1.1


Mass: 212240.594 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: P07293

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Sugars , 4 types, 15 molecules

#6: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#7: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#8: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose / triacetyl-beta-chitotriose


Type: oligosaccharide, Oligosaccharide / Class: Inhibitor / Mass: 627.594 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: triacetyl-beta-chitotriose
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,3,2/[a2122h-1b_1-5_2*NCC/3=O]/1-1-1/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}}LINUCSPDB-CARE
#9: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Details

Sequence detailsRESIDUE F1075 IS DUE TO GPI MODIFICATION.

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: voltage-gated calcium channel Cav1.1 / Type: COMPLEX
Details: The protein complex was endogenous purified from rabbit muscle tissue.
Entity ID: #1-#5 / Source: NATURAL
Molecular weightValue: 0.5 MDa / Experimental value: NO
Source (natural)Organism: Oryctolagus cuniculus (rabbit)
Buffer solutionpH: 8
Details: 100 mM Tris-HCl, pH 8.0,200 mM NaCl, 10 mM CaCl2,15 mM reduced glutathione, 0.1% digitonin, and protease inhibitors.
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: This sample was monodisperse.
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K
Details: Grids were blotted for 2 s and flash-frozen in liquid ethane cooled by liquid nitrogen

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELDBright-field microscopy / Calibrated defocus min: 1.3 nm / Calibrated defocus max: 2.9 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (min): 70 K
Image recordingAverage exposure time: 8 sec. / Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 5 / Num. of real images: 9704
Image scansMovie frames/image: 32

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Processing

SoftwareName: PHENIX / Version: dev_2405: / Classification: refinement
EM software
IDNameVersionCategory
1RELION1.4particle selection
2UCSFImage4image acquisition
4CTFFIND3CTF correction
7Chimera1.10.1model fitting
9PHENIXdev-2405model refinement
10REFMAC5.8model refinement
11RELION1.4initial Euler assignment
12RELION1.4final Euler assignment
13RELION1.4classification
14RELION1.43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1630270
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 123274 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT

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