[English] 日本語
Yorodumi
- EMDB-70244: Cryo-EM structure of CLC-ec1 at pH 3.0 -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-70244
TitleCryo-EM structure of CLC-ec1 at pH 3.0
Map data
Sample
  • Complex: H(+)/Cl(-) exchange transporter ClcA
    • Protein or peptide: H(+)/Cl(-) exchange transporter ClcA
  • Ligand: CHLORIDE ION
Keywordstransmembrane protein cryo-EM Antiporter / TRANSPORT PROTEIN
Function / homology
Function and homology information


cellular stress response to acidic pH / chloride:proton antiporter activity / voltage-gated chloride channel activity / proton transmembrane transport / chloride transmembrane transport / identical protein binding / plasma membrane
Similarity search - Function
Chloride channel, ClcA / Chloride channel, voltage gated / Chloride channel, core / Voltage gated chloride channel
Similarity search - Domain/homology
H(+)/Cl(-) exchange transporter ClcA
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsChien C-T / Chiu W / Maduke M
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM113195 United States
CitationJournal: To Be Published
Title: Molecular mechanism of exchange coupling in CLC chloride/proton antiporters
Authors: Chien C-T / Chiu W / Maduke M
History
DepositionApr 17, 2025-
Header (metadata) releaseJan 7, 2026-
Map releaseJan 7, 2026-
UpdateJan 7, 2026-
Current statusJan 7, 2026Processing site: RCSB / Status: Released

-
Structure visualization

Supplemental images

emd_70244.png

Downloads & links

-
Map

FileDownload / File: emd_70244.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.74 Å/pix.
x 300 pix.
= 222.3 Å		0.74 Å/pix.
x 300 pix.
= 222.3 Å		0.74 Å/pix.
x 300 pix.
= 222.3 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.741 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.424
Minimum - Maximum-2.3239205 - 3.0972645
Average (Standard dev.)0.0026614498 (±0.09024129)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 222.3 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Half map: #2

Fileemd_70244_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_70244_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : H(+)/Cl(-) exchange transporter ClcA

EntireName: H(+)/Cl(-) exchange transporter ClcA
Components
  • Complex: H(+)/Cl(-) exchange transporter ClcA
    • Protein or peptide: H(+)/Cl(-) exchange transporter ClcA
  • Ligand: CHLORIDE ION

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

SupramoleculeName: H(+)/Cl(-) exchange transporter ClcA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Escherichia coli (E. coli)

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

MacromoleculeName: H(+)/Cl(-) exchange transporter ClcA / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 52.115359 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MKTDTPSLET PQAARLRRRQ LIRQLLERDK TPLAILFMAA VVGTLVGLAA VAFDKGVAWL QNQRMGALVH TADNYPLLLT VAFLCSAVL AMFGYFLVRK YAPEAGGSGI PEIEGALEDQ RPVRWWRVLP VKFFGGLGTL GGGMVLGREG PTVQIGGNIG R MVLDIFRL ...String:
MKTDTPSLET PQAARLRRRQ LIRQLLERDK TPLAILFMAA VVGTLVGLAA VAFDKGVAWL QNQRMGALVH TADNYPLLLT VAFLCSAVL AMFGYFLVRK YAPEAGGSGI PEIEGALEDQ RPVRWWRVLP VKFFGGLGTL GGGMVLGREG PTVQIGGNIG R MVLDIFRL KGDEARHTLL ATGAAAGLAA AFNAPLAGIL FIIEEMRPQF RYTLISIKAV FIGVIMSTIM YRIFNHEVAL ID VGKLSDA PLNTLWLYLI LGIIFGIFGP IFNKWVLGMQ DLLHRVHGGN ITKWVLMGGA IGGLCGLLGF VAPATSGGGF NLI PIATAG NFSMGMLVFI FVARVITTLL CFSSGAPGGI FAPMLALGTV LGTAFGMVAV ELFPQYHLEA GTFAIAGMGA LLAA SIRAP LTGIILVLEM TDNYQLILPM IITGLGATLL AQFTGGKPLY SAILARTLAK QEAEQLARSK AASKGSGTLV PRGSG GLEH HHHHH

UniProtKB: H(+)/Cl(-) exchange transporter ClcA

-
Macromolecule #2: CHLORIDE ION

MacromoleculeName: CHLORIDE ION / type: ligand / ID: 2 / Number of copies: 6 / Formula: CL
Molecular weightTheoretical: 35.453 Da

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 3
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

+
Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

1ots

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 66046
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more