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- EMDB-30116: The Cryo-EM Structure of Human Pannexin 1 in the Presence of CBX -

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Basic information

Entry
Database: EMDB / ID: EMD-30116
TitleThe Cryo-EM Structure of Human Pannexin 1 in the Presence of CBX
Map data
Sample
  • Complex: Pannexin 1
    • Protein or peptide: Pannexin-1
KeywordsATP release / Heptameric channel / TRANSPORT PROTEIN
Function / homology
Function and homology information


ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / wide pore channel activity / bleb / monoatomic anion channel activity / monoatomic anion transmembrane transport / gap junction ...ATP transmembrane transporter activity / ATP transport / leak channel activity / Electric Transmission Across Gap Junctions / positive regulation of interleukin-1 alpha production / wide pore channel activity / bleb / monoatomic anion channel activity / monoatomic anion transmembrane transport / gap junction / gap junction channel activity / positive regulation of macrophage cytokine production / response to ATP / oogenesis / monoatomic cation transport / The NLRP3 inflammasome / positive regulation of interleukin-1 beta production / response to ischemia / calcium channel activity / calcium ion transport / actin filament binding / cell-cell signaling / scaffold protein binding / protease binding / transmembrane transporter binding / signaling receptor binding / endoplasmic reticulum membrane / structural molecule activity / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane
Similarity search - Function
Pannexin / Innexin / Innexin / Pannexin family profile.
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.6 Å
AuthorsJin QH / Bo Z
CitationJournal: Cell Res / Year: 2020
Title: Cryo-EM structures of human pannexin 1 channel.
Authors: Qiuheng Jin / Bo Zhang / Xiang Zheng / Ningning Li / Lingyi Xu / Yuan Xie / Fangjun Song / Eijaz Ahmed Bhat / Yuan Chen / Ning Gao / Jiangtao Guo / Xiaokang Zhang / Sheng Ye /
History
DepositionMar 13, 2020-
Header (metadata) releaseApr 15, 2020-
Map releaseApr 15, 2020-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.932
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.932
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6m68
  • Surface level: 0.932
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30116.png

Downloads & links

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Map

FileDownload / File: emd_30116.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.)
1.08 Å/pix.
x 256 pix.
= 276.48 Å		1.08 Å/pix.
x 256 pix.
= 276.48 Å		1.08 Å/pix.
x 256 pix.
= 276.48 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.08 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.932 / Movie #1: 0.932
Minimum - Maximum-1.174703 - 3.1452227
Average (Standard dev.)0.027932107 (±0.15744238)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 276.48 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.081.081.08
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z276.480276.480276.480
α/β/γ90.00090.00090.000
start NX/NY/NZ636181
NX/NY/NZ13113592
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-1.1753.1450.028

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Supplemental data

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Sample components

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Entire : Pannexin 1

EntireName: Pannexin 1
Components
  • Complex: Pannexin 1
    • Protein or peptide: Pannexin-1

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Supramolecule #1: Pannexin 1

SupramoleculeName: Pannexin 1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Pannexin-1

MacromoleculeName: Pannexin-1 / type: protein_or_peptide / ID: 1 / Number of copies: 7 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.791629 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MAIAQLATEY VFSDFLLKEP TEPKFKGLRL ELAVDKMVTC IAVGLPLLLI SLAFAQEISI GTQISCFSPS SFSWRQAAFV DSYCWAAVQ QKNSLQSESG NLPLWLHKFF PYILLLFAIL LYLPPLFWRF AAAPHICSDL KFIMEELDKV YNRAIKAAKS A RDLDMRDG ...String:
MAIAQLATEY VFSDFLLKEP TEPKFKGLRL ELAVDKMVTC IAVGLPLLLI SLAFAQEISI GTQISCFSPS SFSWRQAAFV DSYCWAAVQ QKNSLQSESG NLPLWLHKFF PYILLLFAIL LYLPPLFWRF AAAPHICSDL KFIMEELDKV YNRAIKAAKS A RDLDMRDG ACSVPGVTEN LGQSLWEVSE SHFKYPIVEQ YLKTKKNSNN LIIKYISCRL LTLIIILLAC IYLGYYFSLS SL SDEFVCS IKSGILRNDS TVPDQFQCKL IAVGIFQLLS VINLVVYVLL APVVVYTLFV PFRQKTDVLK VYEILPTFDV LHF KSEGYN DLSLYNLFLE ENISEVKSYK CLKVLENIKS SGQGIDPMLL LTNLGMIKME VVEGKTPMSA EMREEQGNQT AELQ GMNID SETKANNGEK NARQRLLDSS CGSGSHHHHH HHHHH

UniProtKB: Pannexin-1

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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

Concentration5 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
150.0 mMNaClsodium chloride
50.0 mMHEPES
1.0 mMCBX
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 65.84 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: Ab-inito by cryoSPARC
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 53207
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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