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- EMDB-60460: Structure of calcium preference ATP-gated channel P2X1 in the Pre... -

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Basic information

Entry
Database: EMDB / ID: EMD-60460
TitleStructure of calcium preference ATP-gated channel P2X1 in the Pre-open state in the presence of 10mM Calcium ion
Map data
Sample
  • Complex: structure of Apo p2x1
    • Protein or peptide: P2X purinoceptor 1
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: MAGNESIUM ION
  • Ligand: CALCIUM ION
  • Ligand: water
Keywordsion channel / TRANSPORT PROTEIN
Function / homology
Function and homology information


Platelet homeostasis / Elevation of cytosolic Ca2+ levels / regulation of vascular associated smooth muscle contraction / insemination / positive regulation of monoatomic ion transport / positive regulation of calcium ion import across plasma membrane / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / suramin binding / serotonin secretion by platelet ...Platelet homeostasis / Elevation of cytosolic Ca2+ levels / regulation of vascular associated smooth muscle contraction / insemination / positive regulation of monoatomic ion transport / positive regulation of calcium ion import across plasma membrane / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / suramin binding / serotonin secretion by platelet / ligand-gated calcium channel activity / regulation of presynaptic cytosolic calcium ion concentration / regulation of smooth muscle contraction / ceramide biosynthetic process / response to ATP / regulation of synaptic vesicle exocytosis / regulation of calcium ion transport / regulation of vasoconstriction / neuronal action potential / monoatomic cation channel activity / monoatomic ion transport / presynaptic active zone membrane / Neutrophil degranulation / synaptic transmission, glutamatergic / establishment of localization in cell / platelet activation / regulation of blood pressure / postsynaptic membrane / membrane raft / external side of plasma membrane / apoptotic process / protein-containing complex binding / glutamatergic synapse / protein-containing complex / ATP binding / identical protein binding
Similarity search - Function
P2X1 purinoceptor / : / ATP P2X receptors signature. / ATP P2X receptor / P2X purinoreceptor / P2X purinoreceptor extracellular domain superfamily
Similarity search - Domain/homology
Biological speciesMus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.43 Å
AuthorsZhang H / Xu HE
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: Structural basis of ion permeation, calcium selectivity, and pore blocking at the P2X1 receptor
Authors: Zhang H / Xu HE
History
DepositionJun 7, 2024-
Header (metadata) releaseJun 11, 2025-
Map releaseJun 11, 2025-
UpdateJun 11, 2025-
Current statusJun 11, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_60460.png

Downloads & links

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Map

FileDownload / File: emd_60460.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 288 pix.
= 210.24 Å		0.73 Å/pix.
x 288 pix.
= 210.24 Å		0.73 Å/pix.
x 288 pix.
= 210.24 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.73 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.17
Minimum - Maximum-0.8769924 - 1.9248446
Average (Standard dev.)0.002252345 (±0.05355746)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 210.24 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_60460_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_60460_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 Apo p2x1

EntireName: structure of Apo p2x1
Components
  • Complex: structure of Apo p2x1
    • Protein or peptide: P2X purinoceptor 1
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: MAGNESIUM ION
  • Ligand: CALCIUM ION
  • Ligand: water

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Supramolecule #1: structure of Apo p2x1

SupramoleculeName: structure of Apo p2x1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: P2X purinoceptor 1

MacromoleculeName: P2X purinoceptor 1 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 44.908691 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MARRLQDELS AFFFEYDTPR MVLVRNKKVG VIFRLIQLVV LVYVIGWVFV YEKGYQTSSG LISSVSVKLK GLAVTQLQGL GPQVWDVAD YVFPAHGDSS FVVMTNFIMT PQQAQGHCAE NPEGGICQDD SGCTPGKAER KAQGIRTGNC VPFNGTVKTC E IFGWCPVE ...String:
MARRLQDELS AFFFEYDTPR MVLVRNKKVG VIFRLIQLVV LVYVIGWVFV YEKGYQTSSG LISSVSVKLK GLAVTQLQGL GPQVWDVAD YVFPAHGDSS FVVMTNFIMT PQQAQGHCAE NPEGGICQDD SGCTPGKAER KAQGIRTGNC VPFNGTVKTC E IFGWCPVE VDDKIPSPAL LHEAENFTLF IKNSISFPRF KVNRRNLVEE VNGTYMKKCL YHKILHPLCP VFSLGYVVRE SG QDFRSLA EKGGVVGITI DWECDLDWHV RHCKPIYQFH GLYGEKNLSP GFNFRFARHF VQNGTNRRHL FKVFGIRFDI LVD GKAGKF DIIPTMTTIG SGIGIFGVAT VLCDLLLLHI LPKRHYYKQK KFKYAEDMGP GEGERDPAAT SSTLGLQENM RTS

UniProtKB: P2X purinoceptor 1

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Macromolecule #2: ADENOSINE-5'-TRIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 2 / Number of copies: 3 / Formula: ATP
Molecular weightTheoretical: 507.181 Da
Chemical component information

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

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Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 8 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 3 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 5 / Number of copies: 2 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Macromolecule #6: water

MacromoleculeName: water / type: ligand / ID: 6 / Number of copies: 4 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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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

BufferpH: 7.3
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: DIFFRACTION / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.43 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 192582
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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