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Open data
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Basic information
Entry | ![]() | |||||||||
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Title | Cryo-EM structure of Na+,K+-ATPase in the E1.Mg2+ state. | |||||||||
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![]() | ion pump / P-type ATPase / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() 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 / sarcolemma / ATP hydrolysis activity / ATP binding / membrane / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
![]() | Kanai R / Vilsen B / Cornelius F / Toyoshima C | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Crystal structures of Na ,K -ATPase reveal the mechanism that converts the K -bound form to Na -bound form and opens and closes the cytoplasmic gate. Authors: Ryuta Kanai / Bente Vilsen / Flemming Cornelius / Chikashi Toyoshima / ![]() ![]() Abstract: Na ,K -ATPase (NKA) plays a pivotal role in establishing electrochemical gradients for Na and K across the cell membrane by alternating between the E1 (showing high affinity for Na and low affinity ...Na ,K -ATPase (NKA) plays a pivotal role in establishing electrochemical gradients for Na and K across the cell membrane by alternating between the E1 (showing high affinity for Na and low affinity for K ) and E2 (low affinity to Na and high affinity to K ) forms. Presented here are two crystal structures of NKA in E1·Mg and E1·3Na states at 2.9 and 2.8 Å resolution, respectively. These two E1 structures fill a gap in our description of the NKA reaction cycle based on the atomic structures. We describe how NKA converts the K -bound E2·2K form to an E1 (E1·Mg ) form, which allows high-affinity Na binding, eventually closing the cytoplasmic gate (in E1 ~ P·ADP·3Na ) after binding three Na , while keeping the extracellular ion pathway sealed. We now understand previously unknown functional roles for several parts of NKA and that NKA uses even the lipid bilayer for gating the ion pathway. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 48.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.8 KB 20.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.6 KB | Display | ![]() |
Images | ![]() | 88.9 KB | ||
Others | ![]() ![]() | 40.5 MB 40.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 997.9 KB | Display | ![]() |
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Full document | ![]() | 997.5 KB | Display | |
Data in XML | ![]() | 14.2 KB | Display | |
Data in CIF | ![]() | 20.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8jfzMC ![]() 8jbkC ![]() 8jblC ![]() 8jbmC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Voxel size | X=Y=Z: 1.076 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_36220_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_36220_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Na+,K+-ATPase
Entire | Name: Na+,K+-ATPase |
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Components |
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-Supramolecule #1: Na+,K+-ATPase
Supramolecule | Name: Na+,K+-ATPase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3 |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Na+,K+-ATPase beta subunit
Macromolecule | Name: Na+,K+-ATPase beta subunit / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 35.176125 KDa |
Sequence | String: MARGKSKETD GGWKKFLWDS EKKEFLGRTG SSWFKIFLFY LIFYGCLAGI FIGTIQVLLL TLSDFEPKYQ DRVAPPGLSH APYAIKTEI SFSISNPKSY ESFVKSMHKL MDLYNESSQA GNSPFEDCSD TPADYIKRGD LDDSQGQKKA CRFSRMWLKN C SGLDDTTY ...String: MARGKSKETD GGWKKFLWDS EKKEFLGRTG SSWFKIFLFY LIFYGCLAGI FIGTIQVLLL TLSDFEPKYQ DRVAPPGLSH APYAIKTEI SFSISNPKSY ESFVKSMHKL MDLYNESSQA GNSPFEDCSD TPADYIKRGD LDDSQGQKKA CRFSRMWLKN C SGLDDTTY GYAEGKPCVV AKLNRIIGFY PKPLKNTTDL PEELQANYNQ YVLPLRCAAK REEDREKIGS IEYFGLGGYA GF PLQYYPY YGKRLQKKYL QPLLAIQFTN LTQNMELRIE CKVYGENIDY SEKDRFRGRF EVKIEVKS UniProtKB: Sodium/potassium-transporting ATPase subunit beta |
-Macromolecule #2: Na, K-ATPase alpha subunit
Macromolecule | Name: Na, K-ATPase alpha subunit / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 113.309891 KDa |
Sequence | String: MGKGTASDKY EPAATSENAT KSKKKGKKDK IDKKRDLDEL KKEVSMDDHK LSLDELHNKY GTDLTRGLTN ARAKEILARD GPNSLTPPP TTPEWIKFCR QLFGGFSILL WIGAILCFLA YGIQAATEDE PANDNLYLGV VLSTVVIVTG CFSYYQEAKS S RIMDSFKN ...String: MGKGTASDKY EPAATSENAT KSKKKGKKDK IDKKRDLDEL KKEVSMDDHK LSLDELHNKY GTDLTRGLTN ARAKEILARD GPNSLTPPP TTPEWIKFCR QLFGGFSILL WIGAILCFLA YGIQAATEDE PANDNLYLGV VLSTVVIVTG CFSYYQEAKS S RIMDSFKN MVPQQALVIR DGEKSTINAE FVVAGDLVEV KGGDRIPADL RIISAHGCKV DNSSLTGESE PQTRSPEFSS EN PLETRNI AFFSTNCVEG TARGVVVYTG DRTVMGRIAT LASGLEVGRT PIAIEIEHFI HIITGVAVFL GVSFFILSLI LGY SWLEAV IFLIGIIVAN VPEGLLATVT VCLTLTAKRM ARKNCLVKNL EAVETLGSTS TICSDKTGTL TQNRMTVAHM WFDN QIHEA DTTENQSGAA FDKTSATWSA LSRIAALCNR AVFQAGQDNV PILKRSVAGD ASESALLKCI ELCCGSVQGM RDRNP KIVE IPFNSTNKYQ LSIHENEKSS ESRYLLVMKG APERILDRCS TILLNGAEEP LKEDMKEAFQ NAYLELGGLG ERVLGF CHF ALPEDKYNEG YPFDADEPNF PTTDLCFVGL MAMIDPPRAA VPDAVGKCRS AGIKVIMVTG DHPITAKAIA KGVGIIS EG NETIEDIAAR LNIPIGQVNP RDAKACVVHG SDLKDLSTEV LDDILHYHTE IVFARTSPQQ KLIIVEGCQR QGAIVAVT G DGVNDSPALK KADIGVAMGI SGSDVSKQAA DMILLDDNFA SIVTGVEEGR LIFDNLKKSI AYTLTSNIPE ITPFLVFII GNVPLPLGTV TILCIDLGTD MVPAISLAYE QAESDIMKRQ PRNPKTDKLV NERLISMAYG QIGMIQALGG FFSYFVILAE NGFLPMDLI GKRVRWDDRW ISDVEDSFGQ QWTYEQRKIV EFTCHTSFFI SIVVVQWADL IICKTRRNSI FQQGMKNKIL I FGLFEETA LAAFLSYCPG TDVALRMYPL KPSWWFCAFP YSLIIFLYDE MRRFIIRRSP GGWVEQETYY UniProtKB: Sodium/potassium-transporting ATPase subunit alpha |
-Macromolecule #3: FXYD domain-containing ion transport regulator
Macromolecule | Name: FXYD domain-containing ion transport regulator / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 10.195847 KDa |
Sequence | String: MLGAATGLMV LVAVTQGVWA MDPEGPDNDE RFTYDYYRLR VVGLIVAAVL CVIGIIILLA GKCRCKFNQN KRTRSNSGTA TAQHLLQPG EATEC UniProtKB: FXYD domain-containing ion transport regulator |
-Macromolecule #8: CHOLESTEROL
Macromolecule | Name: CHOLESTEROL / type: ligand / ID: 8 / Number of copies: 8 / Formula: CLR |
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Molecular weight | Theoretical: 386.654 Da |
Chemical component information | ![]() ChemComp-CLR: |
-Macromolecule #9: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
Macromolecule | Name: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / type: ligand / ID: 9 / Number of copies: 20 / Formula: PCW |
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Molecular weight | Theoretical: 787.121 Da |
Chemical component information | ![]() ChemComp-PCW: |
-Macromolecule #10: MAGNESIUM ION
Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 10 / Number of copies: 4 / Formula: MG |
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Molecular weight | Theoretical: 24.305 Da |
-Macromolecule #11: water
Macromolecule | Name: water / type: ligand / ID: 11 / Number of copies: 6 / Formula: HOH |
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Molecular weight | Theoretical: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 1.5 mg/mL | |||||||||||||||
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Buffer | pH: 7.5 Component:
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Grid | Model: C-flat-1.2/1.3 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR | |||||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 99.9 % / Chamber temperature: 279 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |