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- PDB-7ddi: Crystal structures of Na+,K+-ATPase in complex with digitoxin -

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Basic information

Entry
Database: PDB / ID: 7ddi
TitleCrystal structures of Na+,K+-ATPase in complex with digitoxin
Components
  • (Sodium/potassium-transporting ATPase subunit ...) x 2
  • FXYD domain-containing ion transport regulator
KeywordsMEMBRANE PROTEIN / Na+ / K+-ATPase / ion transport / Cardiotonic steroids
Function / homology
Function and homology information


Basigin interactions / Ion homeostasis / positive regulation of P-type sodium:potassium-exchanging transporter activity / Na+/K+-exchanging ATPase / positive regulation of sodium ion export across plasma membrane / positive regulation of potassium ion import across plasma membrane / Ion transport by P-type ATPases / P-type sodium:potassium-exchanging transporter activity / sodium ion binding / sodium:potassium-exchanging ATPase complex ...Basigin interactions / Ion homeostasis / positive regulation of P-type sodium:potassium-exchanging transporter activity / Na+/K+-exchanging ATPase / positive regulation of sodium ion export across plasma membrane / positive regulation of potassium ion import across plasma membrane / Ion transport by P-type ATPases / P-type sodium:potassium-exchanging transporter activity / sodium ion binding / sodium:potassium-exchanging ATPase complex / membrane repolarization / establishment or maintenance of transmembrane electrochemical gradient / sodium ion export across plasma membrane / intracellular potassium ion homeostasis / regulation of calcium ion transmembrane transport / intracellular sodium ion homeostasis / ion channel regulator activity / regulation of cardiac muscle contraction by calcium ion signaling / relaxation of cardiac muscle / organelle membrane / potassium ion import across plasma membrane / potassium ion binding / ATPase activator activity / sperm flagellum / intercalated disc / lateral plasma membrane / ATP metabolic process / regulation of sodium ion transport / cardiac muscle contraction / T-tubule / proton transmembrane transport / protein localization to plasma membrane / sarcolemma / transmembrane transport / intracellular calcium ion homeostasis / melanosome / ATPase binding / regulation of gene expression / protein-macromolecule adaptor activity / basolateral plasma membrane / protein stabilization / cell adhesion / apical plasma membrane / axon / innate immune response / protein kinase binding / ATP hydrolysis activity / ATP binding / membrane / plasma membrane
Similarity search - Function
: / Ion-transport regulator, FXYD motif / : / ATP1G1/PLM/MAT8 family / FXYD family signature. / 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. ...: / Ion-transport regulator, FXYD motif / : / ATP1G1/PLM/MAT8 family / FXYD family signature. / 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. / Sodium and potassium ATPases beta subunits signature 2. / 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 / Cation transport ATPase (P-type) / E1-E2 ATPase / 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 / haloacid dehalogenase-like hydrolase / HAD superfamily / HAD-like superfamily
Similarity search - Domain/homology
CHOLESTEROL / Digitoxin / 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / Sodium/potassium-transporting ATPase subunit alpha-1 / Sodium/potassium-transporting ATPase subunit beta-1 / FXYD domain-containing ion transport regulator
Similarity search - Component
Biological speciesSus scrofa (pig)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.72 Å
AuthorsOgawa, H. / Cornelius, F. / Kanai, R. / Motoyama, K. / Vilsen, B. / Toyoshima, C.
Funding support Japan, 3items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)16K18500 Japan
Japan Society for the Promotion of Science (JSPS)16H02499 Japan
Japan Society for the Promotion of Science (JSPS)19H00975 Japan
CitationJournal: Proc.Natl.Acad.Sci.USA / Year: 2021
Title: Binding of cardiotonic steroids to Na + ,K + -ATPase in the E2P state.
Authors: Kanai, R. / Cornelius, F. / Ogawa, H. / Motoyama, K. / Vilsen, B. / Toyoshima, C.
History
DepositionOct 29, 2020Deposition site: PDBJ / Processing site: PDBJ
SupersessionJan 27, 2021ID: 6KPX
Revision 1.0Jan 27, 2021Provider: repository / Type: Initial release
Revision 1.1Nov 29, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.2Mar 12, 2025Group: Database references / Structure summary
Category: pdbx_database_related / pdbx_entry_details / pdbx_modification_feature
Item: _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Sodium/potassium-transporting ATPase subunit alpha-1
B: Sodium/potassium-transporting ATPase subunit beta-1
G: FXYD domain-containing ion transport regulator
C: Sodium/potassium-transporting ATPase subunit alpha-1
D: Sodium/potassium-transporting ATPase subunit beta-1
E: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)323,42335
Polymers309,4056
Non-polymers14,01829
Water18010
1
A: Sodium/potassium-transporting ATPase subunit alpha-1
B: Sodium/potassium-transporting ATPase subunit beta-1
G: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)162,89219
Polymers154,7023
Non-polymers8,19016
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area11380 Å2
ΔGint-77 kcal/mol
Surface area59420 Å2
MethodPISA
2
C: Sodium/potassium-transporting ATPase subunit alpha-1
D: Sodium/potassium-transporting ATPase subunit beta-1
E: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)160,53116
Polymers154,7023
Non-polymers5,82813
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area9890 Å2
ΔGint-70 kcal/mol
Surface area58700 Å2
MethodPISA
Unit cell
Length a, b, c (Å)115.270, 117.715, 491.243
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number19
Space group name H-MP212121
Space group name HallP2ac2ab
Symmetry operation#1: x,y,z
#2: x+1/2,-y+1/2,-z
#3: -x,y+1/2,-z+1/2
#4: -x+1/2,-y,z+1/2
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-ID
11
21
12
22
13
23

NCS domain segments:
Dom-IDComponent-IDEns-IDSelection detailsAuth asym-IDAuth seq-ID
111chain 'A'A21 - 1016
211chain 'C'C21 - 1016
112(chain 'B' and (resid 13 through 161 or resid 168 through 303 or resid 1001 through 1021))B13 - 160
122(chain 'B' and (resid 13 through 161 or resid 168 through 303 or resid 1001 through 1021))B168 - 303
132(chain 'B' and (resid 13 through 161 or resid 168 through 303 or resid 1001 through 1021))B1001 - 1002
142(chain 'B' and (resid 13 through 161 or resid 168 through 303 or resid 1001 through 1021))B1011 - 1012
152(chain 'B' and (resid 13 through 161 or resid 168 through 303 or resid 1001 through 1021))B1021
212chain 'D'D13 - 160
222chain 'D'D168 - 303
232chain 'D'D1001 - 1002
242chain 'D'D1011 - 1012
252chain 'D'D1021
113chain 'E'E17 - 48
213chain 'G'G17 - 48

NCS ensembles :
ID
1
2
3

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Components

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Sodium/potassium-transporting ATPase subunit ... , 2 types, 4 molecules ACBD

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


Mass: 112403.945 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: P05024, Na+/K+-exchanging ATPase
#2: Protein Sodium/potassium-transporting ATPase subunit beta-1 / Sodium/potassium-dependent ATPase subunit beta-1


Mass: 35204.402 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: P05027

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Protein , 1 types, 2 molecules GE

#3: Protein FXYD domain-containing ion transport regulator / Na+/K+ ATPase gamma subunit transcript variant a


Mass: 7094.115 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: Q58K79

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Sugars , 2 types, 6 molecules

#4: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 4 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#10: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 6 types, 33 molecules

#5: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg
#6: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
#7: 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.: 11 / Source method: isolated from a natural source / Formula: C44H85NO8P / Comment: DOPC, phospholipid*YM
#8: Chemical ChemComp-F9R / Digitoxin / 3-[(3S,5R,8R,9S,10S,13R,14S,17R)-10,13-dimethyl-3-[(2R,4S,5S,6R)-6-methyl-5-[(2S,4S,5S,6R)-6-methyl-5-[(2S,4S,5S,6R)-6-methyl-4,5-bis(oxidanyl)oxan-2-yl]oxy-4-oxidanyl-oxan-2-yl]oxy-4-oxidanyl-oxan-2-yl]oxy-14-oxidanyl-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2H-furan-5-one


Mass: 764.939 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C41H64O13 / Feature type: SUBJECT OF INVESTIGATION / Comment: toxin*YM
#9: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C27H46O
#11: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 10 / 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: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 5.66 Å3/Da / Density % sol: 78.26 %
Crystal growTemperature: 288 K / Method: vapor diffusion, hanging drop
Details: 16% PEG 2000 MME, 10% GLYCEROL, 200mM MAGNESIUM CHLORIDE, 5mM GSH, 0.1mM DTT, 0.0001% BHT, 100mM MES-NMDG, PH 6.2

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: SPring-8 / Beamline: BL41XU / Wavelength: 1 Å
DetectorType: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Dec 19, 2015
RadiationMonochromator: M / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 3.7→50 Å / Num. obs: 26055 / % possible obs: 35.9 % / Redundancy: 14.2 % / Biso Wilson estimate: 149.95 Å2 / Rmerge(I) obs: 0.094 / Net I/σ(I): 17.4
Reflection shellResolution: 3.7→3.82 Å / Rmerge(I) obs: 0.336 / Num. unique obs: 59

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Processing

Software
NameVersionClassification
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing
PHENIX1.17.1_3660refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 6KPU

6kpu
PDB Unreleased entry


Resolution: 3.72→16 Å / SU ML: 0.5144 / Cross valid method: FREE R-VALUE / σ(F): 1.63 / Phase error: 32.55
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
RfactorNum. reflection% reflection
Rfree0.2331 1245 4.92 %
Rwork0.1859 24036 -
obs0.1883 25281 35.93 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso mean: 188 Å2
Refinement stepCycle: LAST / Resolution: 3.72→16 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms20692 0 608 10 21310
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.005121745
X-RAY DIFFRACTIONf_angle_d0.877229529
X-RAY DIFFRACTIONf_chiral_restr0.05093361
X-RAY DIFFRACTIONf_plane_restr0.00756352
X-RAY DIFFRACTIONf_dihedral_angle_d16.96018067
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
3.72-3.870.3965110.282299X-RAY DIFFRACTION1.43
3.87-4.040.3992220.2851350X-RAY DIFFRACTION4.95
4.04-4.250.3286350.285709X-RAY DIFFRACTION9.61
4.25-4.510.289590.24231158X-RAY DIFFRACTION15.79
4.51-4.850.2283920.21881796X-RAY DIFFRACTION24.24
4.85-5.320.24661310.21062456X-RAY DIFFRACTION33.17
5.32-6.050.30041860.2484048X-RAY DIFFRACTION54.09
6.05-7.490.27213950.21267175X-RAY DIFFRACTION95.62
7.49-160.18813140.14626245X-RAY DIFFRACTION80.85

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