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- PDB-7n8p: CLC-ec1 at pH 4.5 100mM Cl Swap -

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Basic information

Entry
Database: PDB / ID: 7n8p
TitleCLC-ec1 at pH 4.5 100mM Cl Swap
ComponentsH(+)/Cl(-) exchange transporter ClcA
KeywordsMEMBRANE PROTEIN / CLC / chloride transporter
Function / homologyChloride channel, ClcA / Chloride channel, voltage gated / Chloride channel, core / Voltage gated chloride channel / voltage-gated chloride channel activity / antiporter activity / plasma membrane / H(+)/Cl(-) exchange transporter ClcA
Function and homology information
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.42 Å
AuthorsFortea, E. / Boudker, O. / Accardi, A.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: To Be Published
Title: Structural basis of common gate activation in CLC transporters
Authors: Fortea, E. / Lee, S. / Argyros, Y. / Chadda, R. / Ciftci, D. / Huysmans, G. / Robertson, J.L. / Boudker, O. / Accardi, A.
History
DepositionJun 15, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 16, 2022Provider: repository / Type: Initial release
Revision 1.0Nov 16, 2022Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 16, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 16, 2022Data content type: Mask / Data content type: Mask / Provider: repository / Type: Initial release
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Revision 1.0Nov 16, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 16, 2022Data content type: Mask / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Nov 16, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jun 5, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond
Revision 1.2May 14, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1May 14, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: H(+)/Cl(-) exchange transporter ClcA
B: H(+)/Cl(-) exchange transporter ClcA


Theoretical massNumber of molelcules
Total (without water)100,7812
Polymers100,7812
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: native gel electrophoresis
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein H(+)/Cl(-) exchange transporter ClcA


Mass: 50390.402 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: yadQ, clcA, eriC / Production host: Escherichia coli (E. coli) / References: UniProt: J7Q633
Has ligand of interestN
Has protein modificationN

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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: Structure of ecCLC at pH 4.5 in 100mM Cl / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 100 kDa/nm / Experimental value: YES
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 4.5
SpecimenConc.: 1.7 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid type: UltrAuFoil R1.2/1.3
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 294 K

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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: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus min: 1200 nm / Calibrated defocus max: 2200 nm
Image recordingElectron dose: 72.61 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.14_3260: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.42 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 128951 / Symmetry type: POINT

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