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- PDB-24rc: Cryo-EM structure of human sodium pump W931R mutant in K+-occlude... -

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Basic information

Entry
Database: PDB / ID: 24rc
TitleCryo-EM structure of human sodium pump W931R mutant in K+-occluded E2-Pi state
Components(Sodium/potassium-transporting ATPase subunit ...) x 2
KeywordsMEMBRANE PROTEIN / P-type ATPase / sodium pump / mutant / micelle / hypomagnesimia
Function / homology
Function and homology information


negative regulation of glucocorticoid biosynthetic process / Na+/K+-exchanging ATPase / positive regulation of sodium ion export across plasma membrane / positive regulation of heart contraction / positive regulation of potassium ion import across plasma membrane / positive regulation of striated muscle contraction / photoreceptor inner segment membrane / steroid hormone binding / membrane repolarization during cardiac muscle cell action potential / P-type sodium:potassium-exchanging transporter activity ...negative regulation of glucocorticoid biosynthetic process / Na+/K+-exchanging ATPase / positive regulation of sodium ion export across plasma membrane / positive regulation of heart contraction / positive regulation of potassium ion import across plasma membrane / positive regulation of striated muscle contraction / photoreceptor inner segment membrane / steroid hormone binding / membrane repolarization during cardiac muscle cell action potential / P-type sodium:potassium-exchanging transporter activity / sodium ion binding / sodium:potassium-exchanging ATPase complex / negative regulation of heart contraction / membrane repolarization / establishment or maintenance of transmembrane electrochemical gradient / cell communication by electrical coupling involved in cardiac conduction / regulation of the force of heart contraction / sodium ion export across plasma membrane / intracellular sodium ion homeostasis / cardiac muscle cell action potential involved in contraction / osmosensory signaling pathway / relaxation of cardiac muscle / response to glycoside / Basigin interactions / cellular response to steroid hormone stimulus / organelle membrane / potassium ion binding / potassium ion import across plasma membrane / ATPase activator activity / intracellular potassium ion homeostasis / phosphatase activity / Ion transport by P-type ATPases / lateral plasma membrane / transporter activator activity / sperm flagellum / regulation of sodium ion transport / Ion homeostasis / potassium ion transmembrane transport / T-tubule / proton transmembrane transport / sodium ion transmembrane transport / protein localization to plasma membrane / sarcolemma / regulation of blood pressure / melanosome / extracellular vesicle / ATPase binding / protein-folding chaperone binding / Potential therapeutics for SARS / basolateral plasma membrane / transmembrane transporter binding / protein-macromolecule adaptor activity / apical plasma membrane / postsynaptic density / protein stabilization / membrane raft / response to xenobiotic stimulus / protein heterodimerization activity / axon / endoplasmic reticulum / Golgi apparatus / ATP hydrolysis activity / protein-containing complex / extracellular exosome / ATP binding / membrane / plasma membrane
Similarity search - Function
Sodium/potassium-transporting ATPase subunit beta / Sodium/potassium-transporting ATPase subunit beta superfamily / Sodium / potassium ATPase beta chain / Sodium and potassium ATPases beta subunits signature 1. / : / P-type ATPase subfamily IIC, subunit alpha / Cation-transporting P-type ATPase, C-terminal / Cation transporting ATPase, C-terminus / Cation transporter/ATPase, N-terminus / Cation-transporting P-type ATPase, N-terminal ...Sodium/potassium-transporting ATPase subunit beta / Sodium/potassium-transporting ATPase subunit beta superfamily / Sodium / potassium ATPase beta chain / Sodium and potassium ATPases beta subunits signature 1. / : / P-type ATPase subfamily IIC, subunit alpha / Cation-transporting P-type ATPase, C-terminal / Cation transporting ATPase, C-terminus / Cation transporter/ATPase, N-terminus / Cation-transporting P-type ATPase, N-terminal / Cation transporter/ATPase, N-terminus / P-type ATPase, cytoplasmic domain N / : / P-type ATPase actuator domain / P-type ATPase, haloacid dehalogenase domain / P-type ATPase, phosphorylation site / P-type ATPase, cytoplasmic domain N / E1-E2 ATPases phosphorylation site. / P-type ATPase, A domain superfamily / P-type ATPase / P-type ATPase, transmembrane domain superfamily / HAD superfamily / HAD-like superfamily
Similarity search - Domain/homology
TETRAFLUOROALUMINATE ION / CHOLESTEROL / : / 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / Sodium/potassium-transporting ATPase subunit alpha-1 / Sodium/potassium-transporting ATPase subunit beta-3
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.61 Å
AuthorsFujimura, R. / Gopalasingam, C.C. / Abe, K.
Funding support Japan, 1items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS) Japan
CitationJournal: To Be Published
Title: On the mechanism of hypomagnesimia with treatment-resistant seizures cansed by variants of the Na+,K+-ATPase alpha1 subunit (ATP1A1)
Authors: Artigas, P. / Abe, K.
History
DepositionMar 17, 2026Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 27, 2026Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Sodium/potassium-transporting ATPase subunit alpha-1
B: Sodium/potassium-transporting ATPase subunit beta-3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)145,02016
Polymers138,8932
Non-polymers6,12714
Water1,27971
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Sodium/potassium-transporting ATPase subunit ... , 2 types, 2 molecules AB

#1: Protein Sodium/potassium-transporting ATPase subunit alpha-1 / Na(+)/K(+) ATPase alpha-1 subunit / Sodium pump subunit alpha-1


Mass: 108652.812 Da / Num. of mol.: 1 / Mutation: W931R
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ATP1A1 / Production host: Homo sapiens (human) / References: UniProt: P05023, Na+/K+-exchanging ATPase
#2: Protein Sodium/potassium-transporting ATPase subunit beta-3 / Sodium/potassium-dependent ATPase subunit beta-3 / ATPB-3


Mass: 30240.000 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ATP1B3 / Production host: Homo sapiens (human) / References: UniProt: P54709

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Non-polymers , 6 types, 85 molecules

#3: Chemical ChemComp-ALF / TETRAFLUOROALUMINATE ION


Mass: 102.975 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: AlF4 / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#5: Chemical ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: K / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical
ChemComp-PCW / 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / (Z,Z)-4-HYDROXY-N,N,N-TRIMETHYL-10-OXO-7-[(1-OXO-9-OCTADECENYL)OXY]-3,5,9-TRIOXA-4-PHOSPHAHEPTACOS-18-EN-1-AMINIUM-4-OXIDE


Mass: 787.121 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C44H85NO8P / Comment: DOPC, phospholipid*YM
#7: Chemical ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C27H46O
#8: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 71 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationY

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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: human sodium pump W931R mutant in K+-occluded E2-Pi state
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.135 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 6.5
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: JEOL CRYO ARM 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
2PHENIX1.21.2_5419model refinement
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.61 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 229314 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 56.89 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00210351
ELECTRON MICROSCOPYf_angle_d0.724614006
ELECTRON MICROSCOPYf_chiral_restr0.04131577
ELECTRON MICROSCOPYf_plane_restr0.00381765
ELECTRON MICROSCOPYf_dihedral_angle_d11.59971797

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