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- PDB-7mix: Human N-type voltage-gated calcium channel Cav2.2 in the presence... -

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Basic information

Entry
Database: PDB / ID: 7mix
TitleHuman N-type voltage-gated calcium channel Cav2.2 in the presence of ziconotide at 3.0 Angstrom resolution
Components
  • (Voltage-dependent ...) x 3
  • Omega-conotoxin MVIIA
KeywordsTRANSPORT PROTEIN/TOXIN / Cav2.2 / Channels / Calcium Ion-Selective / TRANSPORT PROTEIN-TOXIN complex / drugs
Function / homology
Function and homology information


regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / host cell presynaptic membrane / cardiac muscle cell action potential involved in contraction / high voltage-gated calcium channel activity / NCAM1 interactions ...regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / host cell presynaptic membrane / cardiac muscle cell action potential involved in contraction / high voltage-gated calcium channel activity / NCAM1 interactions / regulation of ventricular cardiac muscle cell membrane repolarization / calcium ion transport into cytosol / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / ion channel inhibitor activity / neuromuscular junction development / voltage-gated calcium channel complex / neuronal dense core vesicle / regulation of heart rate by cardiac conduction / calcium channel regulator activity / calcium ion import across plasma membrane / regulation of calcium ion transport / response to amyloid-beta / voltage-gated calcium channel activity / sarcoplasmic reticulum / Regulation of insulin secretion / protein localization to plasma membrane / modulation of chemical synaptic transmission / Adrenaline,noradrenaline inhibits insulin secretion / cellular response to amyloid-beta / calcium ion transport / amyloid-beta binding / toxin activity / T cell receptor signaling pathway / chemical synaptic transmission / neuronal cell body / synapse / calcium ion binding / extracellular exosome / extracellular region / ATP binding / membrane / metal ion binding / plasma membrane / cytosol
Similarity search - Function
Voltage-dependent calcium channel, N-type, alpha-1 subunit / Conotoxin, omega-type, conserved site / Omega-conotoxin family signature. / Voltage-dependent calcium channel, L-type, beta-3 subunit / Voltage-dependent L-type calcium channel subunit beta-3, SH3 domain / Conotoxin / Conotoxin / 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-dependent calcium channel, N-type, alpha-1 subunit / Conotoxin, omega-type, conserved site / Omega-conotoxin family signature. / Voltage-dependent calcium channel, L-type, beta-3 subunit / Voltage-dependent L-type calcium channel subunit beta-3, SH3 domain / Conotoxin / Conotoxin / 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 / 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 / Guanylate kinase/L-type calcium channel beta subunit / Guanylate kinase / Guanylate kinase homologues. / von Willebrand factor type A domain / von Willebrand factor (vWF) type A domain / VWFA domain profile. / Voltage-dependent channel domain superfamily / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / EF-hand calcium-binding domain profile. / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / EF-hand domain / Ion transport domain / Ion transport protein / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
1,2-Distearoyl-sn-glycerophosphoethanolamine / CHOLESTEROL / Chem-PT5 / CHOLESTEROL HEMISUCCINATE / Omega-conotoxin MVIIA / Voltage-dependent L-type calcium channel subunit beta-3 / Voltage-dependent calcium channel subunit alpha-2/delta-1 / Voltage-dependent N-type calcium channel subunit alpha-1B
Similarity search - Component
Biological speciesHomo sapiens (human)
Conus magus (magus cone)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
AuthorsYan, N. / Gao, S. / Yao, X.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)5R01GM130762 United States
CitationJournal: Nature / Year: 2021
Title: Structure of human Ca2.2 channel blocked by the painkiller ziconotide.
Authors: Shuai Gao / Xia Yao / Nieng Yan /
Abstract: The neuronal-type (N-type) voltage-gated calcium (Ca) channels, which are designated Ca2.2, have an important role in the release of neurotransmitters. Ziconotide is a Ca2.2-specific peptide pore ...The neuronal-type (N-type) voltage-gated calcium (Ca) channels, which are designated Ca2.2, have an important role in the release of neurotransmitters. Ziconotide is a Ca2.2-specific peptide pore blocker that has been clinically used for treating intractable pain. Here we present cryo-electron microscopy structures of human Ca2.2 (comprising the core α1 and the ancillary α2δ-1 and β3 subunits) in the presence or absence of ziconotide. Ziconotide is thoroughly coordinated by helices P1 and P2, which support the selectivity filter, and the extracellular loops (ECLs) in repeats II, III and IV of α1. To accommodate ziconotide, the ECL of repeat III and α2δ-1 have to tilt upward concertedly. Three of the voltage-sensing domains (VSDs) are in a depolarized state, whereas the VSD of repeat II exhibits a down conformation that is stabilized by Ca2-unique intracellular segments and a phosphatidylinositol 4,5-bisphosphate molecule. Our studies reveal the molecular basis for Ca2.2-specific pore blocking by ziconotide and establish the framework for investigating electromechanical coupling in Ca channels.
History
DepositionApr 18, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 7, 2021Provider: repository / Type: Initial release
Revision 1.1Jul 14, 2021Group: Structure summary / Category: struct / Item: _struct.title
Revision 1.2Jul 28, 2021Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.3Aug 18, 2021Group: Database references / Category: citation / database_2
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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  • Deposited structure unit
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Assembly

Deposited unit
A: Voltage-dependent N-type calcium channel subunit alpha-1B
B: Omega-conotoxin MVIIA
D: Voltage-dependent calcium channel subunit alpha-2/delta-1
C: Voltage-dependent L-type calcium channel subunit beta-3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)453,71024
Polymers444,7844
Non-polymers8,92520
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Voltage-dependent ... , 3 types, 3 molecules ADC

#1: Protein Voltage-dependent N-type calcium channel subunit alpha-1B / Brain calcium channel III / BIII / Calcium channel / L type / alpha-1 polypeptide isoform 5 / ...Brain calcium channel III / BIII / Calcium channel / L type / alpha-1 polypeptide isoform 5 / Voltage-gated calcium channel subunit alpha Cav2.2


Mass: 262831.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CACNA1B, CACH5, CACNL1A5 / Production host: Homo sapiens (human) / References: UniProt: Q00975
#3: Protein Voltage-dependent calcium channel subunit alpha-2/delta-1 / Voltage-gated calcium channel / Voltage-gated calcium channel subunit alpha-2/delta-1


Mass: 124692.469 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CACNA2D1, CACNL2A, CCHL2A, MHS3 / Production host: Homo sapiens (human) / References: UniProt: P54289
#4: Protein Voltage-dependent L-type calcium channel subunit beta-3 / CAB3 / Calcium channel voltage-dependent subunit beta 3


Mass: 54607.852 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CACNB3, CACNLB3 / Production host: Homo sapiens (human) / References: UniProt: P54284

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Protein/peptide , 1 types, 1 molecules B

#2: Protein/peptide Omega-conotoxin MVIIA / SNX-111 / Ziconotide


Mass: 2652.216 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Conus magus (magus cone) / References: UniProt: P05484

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Sugars , 4 types, 8 molecules

#5: 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


Type: oligosaccharide / Mass: 627.594 Da / Num. of mol.: 1 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#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.: 3 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#7: 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-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 830.786 Da / Num. of mol.: 1 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,4,3/[a2122h-1b_1-5_2*NCC/3=O]/1-1-1-1/a4-b1_b4-c1_c4-d1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}}LINUCSPDB-CARE
#8: 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.: 3 / Source method: obtained synthetically / 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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Non-polymers , 5 types, 12 molecules

#9: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#10: Chemical ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C31H50O4 / Feature type: SUBJECT OF INVESTIGATION
#11: Chemical
ChemComp-CLR / CHOLESTEROL / Cholesterol


Mass: 386.654 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C27H46O / Feature type: SUBJECT OF INVESTIGATION
#12: Chemical ChemComp-3PE / 1,2-Distearoyl-sn-glycerophosphoethanolamine / 3-SN-PHOSPHATIDYLETHANOLAMINE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE / Phosphatidylethanolamine


Mass: 748.065 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C41H82NO8P / Comment: phospholipid*YM
#13: Chemical ChemComp-PT5 / [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate / Phosphatidylinositol 4,5-bisphosphate / PtdIns(4,5)P2 / Phosphatidylinositol 4,5-bisphosphate


Mass: 1047.088 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C47H85O19P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM

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Details

Has ligand of interestY

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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

Component
IDNameTypeEntity IDParent-IDSource
1Cav2.2-ziconotideCOMPLEX#1-#2, #40MULTIPLE SOURCES
2Cav2.2N-type calcium channelCOMPLEX#1, #41RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
11Homo sapiens (human)9606
22Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
11Homo sapiens (human)9606
22Homo sapiens (human)9606
Buffer solutionpH: 7.4
SpecimenConc.: 20 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Cav2.2-ziconotide
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K / Details: blot for 6 seconds before plunging

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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: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 170839 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00322195
ELECTRON MICROSCOPYf_angle_d0.61530078
ELECTRON MICROSCOPYf_dihedral_angle_d10.7783124
ELECTRON MICROSCOPYf_chiral_restr0.0443409
ELECTRON MICROSCOPYf_plane_restr0.0053761

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