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- PDB-6kzo: membrane protein -

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Basic information

Entry
Database: PDB / ID: 6kzo
Titlemembrane protein
ComponentsVoltage-dependent T-type calcium channel subunit alpha-1G
KeywordsMEMBRANE PROTEIN / voltage-gated calcium channel
Function / homology
Function and homology information


SA node cell to atrial cardiac muscle cell signaling / AV node cell to bundle of His cell signaling / voltage-gated calcium channel activity involved SA node cell action potential / sinoatrial node development / low voltage-gated calcium channel activity / response to nickel cation / voltage-gated calcium channel activity involved in AV node cell action potential / AV node cell action potential / SA node cell action potential / membrane depolarization during SA node cell action potential ...SA node cell to atrial cardiac muscle cell signaling / AV node cell to bundle of His cell signaling / voltage-gated calcium channel activity involved SA node cell action potential / sinoatrial node development / low voltage-gated calcium channel activity / response to nickel cation / voltage-gated calcium channel activity involved in AV node cell action potential / AV node cell action potential / SA node cell action potential / membrane depolarization during SA node cell action potential / membrane depolarization during AV node cell action potential / high voltage-gated calcium channel activity / regulation of atrial cardiac muscle cell membrane depolarization / NCAM1 interactions / cardiac muscle cell action potential involved in contraction / calcium ion import / voltage-gated calcium channel complex / calcium ion import across plasma membrane / regulation of heart rate by cardiac conduction / Smooth Muscle Contraction / voltage-gated calcium channel activity / regulation of membrane potential / calcium ion transmembrane transport / scaffold protein binding / chemical synaptic transmission / synapse / plasma membrane / cytoplasm
Similarity search - Function
Voltage-dependent calcium channel, T-type, alpha-1 subunit / Voltage-dependent calcium channel, alpha-1 subunit / : / Voltage-dependent channel domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
1,2-Distearoyl-sn-glycerophosphoethanolamine / CHOLESTEROL HEMISUCCINATE / Voltage-dependent T-type calcium channel subunit alpha-1G
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsYan, N.
Funding support China, 5items
OrganizationGrant numberCountry
National Natural Science Foundation of China31621092 China
National Natural Science Foundation of China31630017 China
National Natural Science Foundation of China81861138009 China
Ministry of Science and Technology (China)2016YFA0500402 China
Ministry of Science and Technology (China)2016YFA0501100 China
CitationJournal: Nature / Year: 2019
Title: Cryo-EM structures of apo and antagonist-bound human Ca3.1.
Authors: Yanyu Zhao / Gaoxingyu Huang / Qiurong Wu / Kun Wu / Ruiqi Li / Jianlin Lei / Xiaojing Pan / Nieng Yan /
Abstract: Among the ten subtypes of mammalian voltage-gated calcium (Ca) channels, Ca3.1-Ca3.3 constitute the T-type, or the low-voltage-activated, subfamily, the abnormal activities of which are associated ...Among the ten subtypes of mammalian voltage-gated calcium (Ca) channels, Ca3.1-Ca3.3 constitute the T-type, or the low-voltage-activated, subfamily, the abnormal activities of which are associated with epilepsy, psychiatric disorders and pain. Here we report the cryo-electron microscopy structures of human Ca3.1 alone and in complex with a highly Ca3-selective blocker, Z944, at resolutions of 3.3 Å and 3.1 Å, respectively. The arch-shaped Z944 molecule reclines in the central cavity of the pore domain, with the wide end inserting into the fenestration on the interface between repeats II and III, and the narrow end hanging above the intracellular gate like a plug. The structures provide the framework for comparative investigation of the distinct channel properties of different Ca subfamilies.
History
DepositionSep 25, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 18, 2019Provider: repository / Type: Initial release
Revision 1.1Jan 1, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Jul 29, 2020Group: Data collection / Derived calculations / Structure summary
Category: chem_comp / entity ...chem_comp / entity / pdbx_chem_comp_identifier / pdbx_entity_nonpoly / struct_conn / struct_site / struct_site_gen
Item: _chem_comp.name / _chem_comp.type ..._chem_comp.name / _chem_comp.type / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_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 1.3Oct 30, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / em_admin / entity / pdbx_entity_nonpoly / pdbx_entry_details / pdbx_modification_feature
Item: _chem_comp.name / _chem_comp.pdbx_synonyms ..._chem_comp.name / _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _pdbx_entry_details.has_protein_modification

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Assembly

Deposited unit
A: Voltage-dependent T-type calcium channel subunit alpha-1G
hetero molecules


Theoretical massNumber of molelcules
Total (without water)262,39123
Polymers250,5061
Non-polymers11,88422
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area12100 Å2
ΔGint-122 kcal/mol
Surface area51090 Å2

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Components

#1: Protein Voltage-dependent T-type calcium channel subunit alpha-1G / Cav3.1c / NBR13 / Voltage-gated calcium channel subunit alpha Cav3.1


Mass: 250506.375 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CACNA1G, KIAA1123 / Production host: Homo sapiens (human) / References: UniProt: O43497
#2: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca
#3: 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


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 5
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
#4: Chemical
ChemComp-3PE / 1,2-Distearoyl-sn-glycerophosphoethanolamine / 3-SN-PHOSPHATIDYLETHANOLAMINE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE


Mass: 748.065 Da / Num. of mol.: 13 / Source method: obtained synthetically / Formula: C41H82NO8P / Comment: phospholipid*YM
#5: Chemical ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C31H50O4
Has ligand of interestN
Has protein modificationY

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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: membrane protein / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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 FIELD
Image recordingElectron dose: 48 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING ONLY
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 105559 / Symmetry type: POINT

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