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- PDB-7wyu: Cryo-EM structure of Na+,K+-ATPase in the E2P state formed by ATP -

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Basic information

Entry
Database: PDB / ID: 7wyu
TitleCryo-EM structure of Na+,K+-ATPase in the E2P state formed by ATP
Components
  • FXYD domain-containing ion transport regulator
  • Na+,K+-ATPase beta subunit
  • Sodium/potassium-transporting ATPase subunit alpha
KeywordsMEMBRANE PROTEIN / Na+ / K+-ATPase / ion transport / TRANSPORT PROTEIN
Function / homology
Function and homology information


regulation of monoatomic ion transport / P-type sodium:potassium-exchanging transporter activity / sodium:potassium-exchanging ATPase complex / sodium ion export across plasma membrane / intracellular potassium ion homeostasis / intracellular sodium ion homeostasis / potassium ion import across plasma membrane / ATPase activator activity / sodium channel regulator activity / monoatomic ion transport ...regulation of monoatomic ion transport / P-type sodium:potassium-exchanging transporter activity / sodium:potassium-exchanging ATPase complex / sodium ion export across plasma membrane / intracellular potassium ion homeostasis / intracellular sodium ion homeostasis / potassium ion import across plasma membrane / ATPase activator activity / sodium channel regulator activity / monoatomic ion transport / proton transmembrane transport / ATP hydrolysis activity / ATP binding / membrane / metal ion binding / 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. / Sodium and potassium ATPases beta subunits signature 2. ...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
ADENOSINE-5'-TRIPHOSPHATE / CHOLESTEROL / 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / Sodium/potassium-transporting ATPase subunit beta / Sodium/potassium-transporting ATPase subunit alpha / FXYD domain-containing ion transport regulator
Similarity search - Component
Biological speciesSqualus acanthias (spiny dogfish)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsKanai, R. / Cornelius, F. / Vilsen, B. / Toyoshima, C.
Funding support Japan, Denmark, 6items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)19H00975 Japan
Japan Society for the Promotion of Science (JSPS)18K06148 Japan
Danish Council for Independent ResearchDFF7016-00193B Denmark
Danish Council for Independent ResearchDFF4183-00011A Denmark
Novo Nordisk FoundationNNF14OC0013409 Denmark
Novo Nordisk FoundationNNF13OC0006555 Denmark
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Cryoelectron microscopy of Na,K-ATPase in the two E2P states with and without cardiotonic steroids.
Authors: Ryuta Kanai / Flemming Cornelius / Bente Vilsen / Chikashi Toyoshima /
Abstract: Cryoelectron microscopy (cryo-EM) was applied to Na+,K+-ATPase (NKA) to determine the structures of two E2P states, one (E2PATP) formed by ATP and Mg2+ in the forward reaction, and the other (E2PPi) ...Cryoelectron microscopy (cryo-EM) was applied to Na+,K+-ATPase (NKA) to determine the structures of two E2P states, one (E2PATP) formed by ATP and Mg2+ in the forward reaction, and the other (E2PPi) formed by inorganic phosphate (Pi) and Mg2+ in the backward reaction, with and without ouabain or istaroxime, representatives of classical and new-generation cardiotonic steroids (CTSs). These two E2P states exhibit different biochemical properties. In particular, K+-sensitive acceleration of the dephosphorylation reaction is not observed with E2PPi, attributed to the presence of a Mg2+ ion in the transmembrane cation binding sites. The cryo-EM structures of NKA demonstrate that the two E2P structures are nearly identical but Mg2+ in the transmembrane binding cavity is identified only in E2PPi, corroborating the idea that it should be denoted as E2PPi·Mg2+. We can now explain why the absence of transmembrane Mg2+ in E2PATP confers the K+ sensitivity in dephosphorylation. In addition, we show that ATP bridges the actuator (A) and nucleotide binding (N) domains, stabilizing the E2PATP state; CTS binding causes hardly any changes in the structure of NKA, both in E2PATP and E2PPi·Mg2+, indicating that the binding mechanism is conformational selection; and istaroxime binds to NKA, extending its aminoalkyloxime group deep into the cation binding site. This orientation is upside down compared to that of classical CTSs with respect to the steroid ring. Notably, mobile parts of NKA are resolved substantially better in the electron microscopy (EM) maps than in previous X-ray structures, including sugars sticking out from the β-subunit and many phospholipid molecules.
History
DepositionFeb 16, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 27, 2022Provider: repository / Type: Initial release

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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
B: Na+,K+-ATPase beta subunit
G: FXYD domain-containing ion transport regulator
C: Sodium/potassium-transporting ATPase subunit alpha
D: Na+,K+-ATPase beta subunit
E: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)347,64354
Polymers317,5246
Non-polymers30,11948
Water724
1
A: Sodium/potassium-transporting ATPase subunit alpha
B: Na+,K+-ATPase beta subunit
G: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)173,82227
Polymers158,7623
Non-polymers15,06024
Water181
TypeNameSymmetry operationNumber
identity operation1_5551
2
C: Sodium/potassium-transporting ATPase subunit alpha
D: Na+,K+-ATPase beta subunit
E: FXYD domain-containing ion transport regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)173,82227
Polymers158,7623
Non-polymers15,06024
Water181
TypeNameSymmetry operationNumber
identity operation1_5551
Noncrystallographic symmetry (NCS)NCS oper: (Code: givenMatrix: (-0.999991439062, 0.00327280580189, 0.00253190528229), (-0.00326362162215, -0.999988111085, 0.00362304599727), (0.00254373270665, 0.00361475179977, 0.999990231449)Vector: ...NCS oper: (Code: given
Matrix: (-0.999991439062, 0.00327280580189, 0.00253190528229), (-0.00326362162215, -0.999988111085, 0.00362304599727), (0.00254373270665, 0.00361475179977, 0.999990231449)
Vector: 257.441092704, 258.366559231, -0.845132911589)

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Components

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Protein , 3 types, 6 molecules ACBDGE

#1: Protein Sodium/potassium-transporting ATPase subunit alpha


Mass: 113389.859 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Squalus acanthias (spiny dogfish) / References: UniProt: Q4H132
#2: Protein Na+,K+-ATPase beta subunit / Sodium/potassium-transporting ATPase subunit beta-1


Mass: 35176.125 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Squalus acanthias (spiny dogfish) / References: UniProt: C4IX13
#3: Protein FXYD domain-containing ion transport regulator


Mass: 10195.847 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Squalus acanthias (spiny dogfish) / References: UniProt: Q70Q12

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Sugars , 4 types, 8 molecules

#4: Polysaccharide alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1056.964 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/4,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a1221m-1a_1-5]/1-1-2-3-3-4/a4-b1_a6-f1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}[(6+1)][a-L-Fucp]{}}LINUCSPDB-CARE
#5: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1114.016 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-2DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-1-3/a4-b1_b4-c1_c3-d1_c6-f1_d2-e1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}[(6+1)][a-D-Manp]{}}}}LINUCSPDB-CARE
#6: Polysaccharide alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 894.823 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/4,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a1221m-1a_1-5]/1-1-2-3-4/a4-b1_a6-e1_b4-c1_c3-d1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}[(6+1)][a-L-Fucp]{}}LINUCSPDB-CARE
#7: 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.: 2
Source method: isolated from a genetically manipulated source
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

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Non-polymers , 6 types, 44 molecules

#8: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#9: Chemical
ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Na
#10: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Comment: ATP, energy-carrying molecule*YM
#11: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C27H46O
#12: 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.: 24 / Source method: obtained synthetically / Formula: C44H85NO8P / Comment: DOPC, phospholipid*YM
#13: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN

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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: Sodium/potassium-transporting ATPase / Type: COMPLEX / Entity ID: #1-#3 / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Squalus acanthias (spiny dogfish)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
113 mMsodium chlorideNaCl1
21 mMATP.2NaC10H14N5O13P3Na21
33 mMmagnesium chlorideMgCl21
420 mMimidazoleC3H4N21
51 mMDTTC4H10O2S21
60.01 %C12E8C28H58O91
SpecimenConc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: C-flat-1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 99.9 % / Chamber temperature: 279 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refine1.19.2_4158refinement
PHENIX1.19.2_4158refinement
EM software
IDNameVersionCategory
1RELION3.1.3particle selection
2EPU2.12.0image acquisition
4CTFFIND4.1.14CTF correction
7PHENIX1.19.2model fitting
9PHENIX1.19.2model refinement
10RELION3.1.3initial Euler assignment
11RELION3.1.3final Euler assignment
12RELION3.1.3classification
13RELION3.1.33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 75030 / Symmetry type: POINT
Atomic model buildingB value: 64 / Protocol: RIGID BODY FIT / Space: REAL / Target criteria: Correlation Coeeficient
Atomic model buildingPDB-ID: 7D91

7d91

RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 69.04 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.004723092
ELECTRON MICROSCOPYf_angle_d0.97331166
ELECTRON MICROSCOPYf_chiral_restr0.23323576
ELECTRON MICROSCOPYf_plane_restr0.00696464
ELECTRON MICROSCOPYf_dihedral_angle_d17.68829212

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