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- EMDB-34157: structure of human connexin 40.1 pentameric hemichannel by cryoEM -

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Basic information

Entry
Database: EMDB / ID: EMD-34157
Titlestructure of human connexin 40.1 pentameric hemichannel by cryoEM
Map data
Sample
  • Complex: structure of human connexin 40.1 pentameric hemichannel
    • Protein or peptide: Gap junction delta-4 protein
Keywordsconnexin hemichannel / MEMBRANE PROTEIN
Function / homology
Function and homology information


regulation of satellite cell activation involved in skeletal muscle regeneration / connexin complex / Gap junction assembly / gap junction channel activity / cell-cell signaling
Similarity search - Function
Connexin / Connexin, N-terminal / Connexin, conserved site / Gap junction protein, cysteine-rich domain / Connexin, N-terminal domain superfamily / Connexin / Connexins signature 1. / Connexins signature 2. / Connexin homologues / Gap junction channel protein cysteine-rich domain
Similarity search - Domain/homology
Gap junction delta-4 protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsZhang H / Wang DP
Funding support China, 3 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31900046 China
National Natural Science Foundation of China (NSFC)81972085 China
National Natural Science Foundation of China (NSFC)82172465 China
CitationJournal: To Be Published
Title: structure of human connexin 40.1 intercellular gap junction channel by cryoEM
Authors: Zhang H / Wang DP
History
DepositionAug 23, 2022-
Header (metadata) releaseAug 30, 2023-
Map releaseAug 30, 2023-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_34157.png

Downloads & links

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Map

FileDownload / File: emd_34157.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.92 Å/pix.
x 256 pix.
= 235.52 Å		0.92 Å/pix.
x 256 pix.
= 235.52 Å		0.92 Å/pix.
x 256 pix.
= 235.52 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.92 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.21
Minimum - Maximum-2.2875934 - 3.6305711
Average (Standard dev.)0.005808034 (±0.11637206)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 235.52 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_34157_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_34157_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : structure of human connexin 40.1 pentameric hemichannel

EntireName: structure of human connexin 40.1 pentameric hemichannel
Components
  • Complex: structure of human connexin 40.1 pentameric hemichannel
    • Protein or peptide: Gap junction delta-4 protein

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Supramolecule #1: structure of human connexin 40.1 pentameric hemichannel

SupramoleculeName: structure of human connexin 40.1 pentameric hemichannel
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 130 KDa

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Macromolecule #1: Gap junction delta-4 protein

MacromoleculeName: Gap junction delta-4 protein / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.030973 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MEGVDLLGFL IITLNCNVTM VGKLWFVLTM LLRMLVIVLA GRPVYQDEQE RFVCNTLQPG CANVCYDVFS PVSHLRFWLI QGVCVLLPS AVFSVYVLHR GATLAALGPR RCPDPREPAS GQRRCPRPFG ERGGLQVPDF SAGYIIHLLL RTLLEAAFGA L HYFLFGFL ...String:
MEGVDLLGFL IITLNCNVTM VGKLWFVLTM LLRMLVIVLA GRPVYQDEQE RFVCNTLQPG CANVCYDVFS PVSHLRFWLI QGVCVLLPS AVFSVYVLHR GATLAALGPR RCPDPREPAS GQRRCPRPFG ERGGLQVPDF SAGYIIHLLL RTLLEAAFGA L HYFLFGFL APKKFPCTRP PCTGVVDCYV SRPTEKSLLM LFLWAVSALS FLLGLADLVC SLRRRMRRRP GPPTS

UniProtKB: Gap junction delta-4 protein

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration4 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 62658
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: MAXIMUM LIKELIHOOD

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