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- EMDB-9932: Cryo-EM structure of the human P4-type flippase ATP8A1-CDC50 (E1 ... -

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Basic information

Entry
Database: EMDB / ID: EMD-9932
TitleCryo-EM structure of the human P4-type flippase ATP8A1-CDC50 (E1 state class2)
Map data
Sample
  • Complex: ATP8A1-CDC50a
    • Protein or peptide: Phospholipid-transporting ATPase
    • Protein or peptide: Cell cycle control protein 50A
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: CHOLESTEROL HEMISUCCINATE
Keywordsflippase / MEMBRANE PROTEIN
Function / homology
Function and homology information


aminophospholipid translocation / positive regulation of phospholipid translocation / aminophospholipid flippase activity / aminophospholipid transport / chromaffin granule membrane / phosphatidylserine flippase activity / protein localization to endosome / phospholipid-translocating ATPase complex / positive regulation of protein exit from endoplasmic reticulum / phosphatidylserine floppase activity ...aminophospholipid translocation / positive regulation of phospholipid translocation / aminophospholipid flippase activity / aminophospholipid transport / chromaffin granule membrane / phosphatidylserine flippase activity / protein localization to endosome / phospholipid-translocating ATPase complex / positive regulation of protein exit from endoplasmic reticulum / phosphatidylserine floppase activity / ATPase-coupled intramembrane lipid transporter activity / phospholipid transport / xenobiotic transmembrane transport / ATPase-coupled monoatomic cation transmembrane transporter activity / P-type phospholipid transporter / azurophil granule membrane / phospholipid translocation / transport vesicle membrane / organelle membrane / Ion transport by P-type ATPases / synaptic vesicle endocytosis / transport across blood-brain barrier / specific granule membrane / endomembrane system / learning / trans-Golgi network / positive regulation of neuron projection development / synaptic vesicle membrane / late endosome membrane / cytoplasmic vesicle / early endosome membrane / monoatomic ion transmembrane transport / positive regulation of cell migration / apical plasma membrane / intracellular membrane-bounded organelle / Neutrophil degranulation / glutamatergic synapse / structural molecule activity / magnesium ion binding / endoplasmic reticulum / Golgi apparatus / ATP hydrolysis activity / extracellular exosome / ATP binding / membrane / plasma membrane / cytosol
Similarity search - Function
CDC50/LEM3 family / LEM3 (ligand-effect modulator 3) family / CDC50 family / P-type ATPase, subfamily IV / P-type ATPase, C-terminal / P-type ATPase, N-terminal / Phospholipid-translocating ATPase N-terminal / Phospholipid-translocating P-type ATPase C-terminal / P-type ATPase, cytoplasmic domain N / P-type ATPase actuator domain / P-type ATPase, haloacid dehalogenase domain ...CDC50/LEM3 family / LEM3 (ligand-effect modulator 3) family / CDC50 family / P-type ATPase, subfamily IV / P-type ATPase, C-terminal / P-type ATPase, N-terminal / Phospholipid-translocating ATPase N-terminal / Phospholipid-translocating P-type ATPase C-terminal / 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
Phospholipid-transporting ATPase / Cell cycle control protein 50A / Phospholipid-transporting ATPase IA
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.22 Å
AuthorsHiraizumi M / Yamashita K / Nishizawa T / Nureki O
CitationJournal: Science / Year: 2019
Title: Cryo-EM structures capture the transport cycle of the P4-ATPase flippase.
Authors: Masahiro Hiraizumi / Keitaro Yamashita / Tomohiro Nishizawa / Osamu Nureki /
Abstract: In eukaryotic membranes, type IV P-type adenosine triphosphatases (P4-ATPases) mediate the translocation of phospholipids from the outer to the inner leaflet and maintain lipid asymmetry, which is ...In eukaryotic membranes, type IV P-type adenosine triphosphatases (P4-ATPases) mediate the translocation of phospholipids from the outer to the inner leaflet and maintain lipid asymmetry, which is critical for membrane trafficking and signaling pathways. Here, we report the cryo-electron microscopy structures of six distinct intermediates of the human ATP8A1-CDC50a heterocomplex at resolutions of 2.6 to 3.3 angstroms, elucidating the lipid translocation cycle of this P4-ATPase. ATP-dependent phosphorylation induces a large rotational movement of the actuator domain around the phosphorylation site in the phosphorylation domain, accompanied by lateral shifts of the first and second transmembrane helices, thereby allowing phosphatidylserine binding. The phospholipid head group passes through the hydrophilic cleft, while the acyl chain is exposed toward the lipid environment. These findings advance our understanding of the flippase mechanism and the disease-associated mutants of P4-ATPases.
History
DepositionJun 7, 2019-
Header (metadata) releaseAug 28, 2019-
Map releaseAug 28, 2019-
UpdateJun 25, 2025-
Current statusJun 25, 2025Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.012
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.012
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6k7h
  • Surface level: 0.012
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-6k7h
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_9932.png

Downloads & links

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Map

FileDownload / File: emd_9932.map.gz / Format: CCP4 / Size: 67 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 260 pix.
= 215.8 Å		0.83 Å/pix.
x 260 pix.
= 215.8 Å		0.83 Å/pix.
x 260 pix.
= 215.8 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.012 / Movie #1: 0.012
Minimum - Maximum-0.0789905 - 0.13191473
Average (Standard dev.)0.00025763485 (±0.003541128)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions260260260
Spacing260260260
CellA=B=C: 215.8 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.830.830.83
M x/y/z260260260
origin x/y/z0.0000.0000.000
length x/y/z215.800215.800215.800
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS260260260
D min/max/mean-0.0790.1320.000

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Supplemental data

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Mask #1

Fileemd_9932_msk_1.map
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Half map: #1

Fileemd_9932_half_map_1.map
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Half map: #2

Fileemd_9932_half_map_2.map
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Sample components

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Entire : ATP8A1-CDC50a

EntireName: ATP8A1-CDC50a
Components
  • Complex: ATP8A1-CDC50a
    • Protein or peptide: Phospholipid-transporting ATPase
    • Protein or peptide: Cell cycle control protein 50A
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: CHOLESTEROL HEMISUCCINATE

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Supramolecule #1: ATP8A1-CDC50a

SupramoleculeName: ATP8A1-CDC50a / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Phospholipid-transporting ATPase

MacromoleculeName: Phospholipid-transporting ATPase / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: P-type phospholipid transporter
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 130.537852 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: GSREFMPTMR RTVSEIRSRA EGYEKTDDVS EKTSLADQEE VRTIFINQPQ LTKFCNNHVS TAKYNIITFL PRFLYSQFRR AANSFFLFI ALLQQIPDVS PTGRYTTLVP LLFILAVAAI KEIIEDIKRH KADNAVNKKQ TQVLRNGAWE IVHWEKVNVG D IVIIKGKE ...String:
GSREFMPTMR RTVSEIRSRA EGYEKTDDVS EKTSLADQEE VRTIFINQPQ LTKFCNNHVS TAKYNIITFL PRFLYSQFRR AANSFFLFI ALLQQIPDVS PTGRYTTLVP LLFILAVAAI KEIIEDIKRH KADNAVNKKQ TQVLRNGAWE IVHWEKVNVG D IVIIKGKE YIPADTVLLS SSEPQAMCYI ETSNLDGETN LKIRQGLPAT SDIKDVDSLM RISGRIECES PNRHLYDFVG NI RLDGHGT VPLGADQILL RGAQLRNTQW VHGIVVYTGH DTKLMQNSTS PPLKLSNVER ITNVQILILF CILIAMSLVC SVG SAIWNR RHSGKDWYLN LNYGGASNFG LNFLTFIILF NNLIPISLLV TLEVVKFTQA YFINWDLDMH YEPTDTAAMA RTSN LNEEL GQVKYIFSDK TGTLTCNVMQ FKKCTIAGVA YGQNSQFGDE KTFSDSSLLE NLQNNHPTAP IICEFLTMMA VCHTA VPER ERDKIIYQAA SPDEGALVRA AKQLNFVFTG RTPDSVIIDS LGQEERYELL NVLEFTSARK RMSVIVRTPS GKLRLY CKG ADTVIYDRLA ETSKYKEITL KHLEQFATEG LRTLCFAVAE ISESDFQEWR AVYQRASTSV QNRLLKLEES YELIEKN LQ LLGATAIEDK LQDQVPETIE TLMKADIKIW ILTGDKQETA INIGHSCKLL KKNMGMIVIN EGSLDGTRET LSRHCTTL G DALRKENDFA LIIDGKTLKY ALTFGVRQYF LDLALSCKAV ICCRVSPLQK SEVVEMVKKQ VKVVTLAIGD GANDVSMIQ TAHVGVGISG NEGLQAANSS DYSIAQFKYL KNLLMIHGAW NYNRVSKCIL YCFYKNIVLY IIEIWFAFVN GFSGQILFER WCIGLYNVM FTAMPPLTLG IFERSCRKEN MLKYPELYKT SQNALDFNTK VFWVHCLNGL FHSVILFWFP LKALQYGTAF G NGKTSDYL LLGNFVYTFV VITVCLKAGL ETSYWTWFSH IAIWGSIALW VVFFGIYSSL WPAIPMAPDM SGEAAMLFSS GV FWMGLLF IPVASLLLDV VYKVIKRTAF KTLVDEVQEL EAKSQDPGAV VLGKSLTERA QLLKNVFKKN HVNLYRSESL QQN LLHGYA FSQDENGIVS QSEVIRAYDT TKQRPDEW

UniProtKB: Phospholipid-transporting ATPase

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Macromolecule #2: Cell cycle control protein 50A

MacromoleculeName: Cell cycle control protein 50A / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.727527 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MAMNYNAKDE VDGGPPCAPG GTAKTRRPDN TAFKQQRLPA WQPILTAGTV LPIFFIIGLI FIPIGIGIFV TSNNIREIEI DYTGTEPSS PCNKCLSPDV TPCFCTINFT LEKSFEGNVF MYYGLSNFYQ NHRRYVKSRD DSQLNGDSSA LLNPSKECEP Y RRNEDKPI ...String:
MAMNYNAKDE VDGGPPCAPG GTAKTRRPDN TAFKQQRLPA WQPILTAGTV LPIFFIIGLI FIPIGIGIFV TSNNIREIEI DYTGTEPSS PCNKCLSPDV TPCFCTINFT LEKSFEGNVF MYYGLSNFYQ NHRRYVKSRD DSQLNGDSSA LLNPSKECEP Y RRNEDKPI APCGAIANSM FNDTLELFLI GNDSYPIPIA LKKKGIAWWT DKNVKFRNPP GGDNLEERFK GTTKPVNWLK PV YMLDSDP DNNGFINEDF IVWMRTAALP TFRKLYRLIE RKSDLHPTLP AGRYSLNVTY NYPVHYFDGR KRMILSTISW MGG KNPFLG IAYIAVGSIS FLLGVVLLVI NHKYRNSSNT ADITI

UniProtKB: Cell cycle control protein 50A

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Macromolecule #4: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 4 / Number of copies: 2 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

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

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Macromolecule #5: CHOLESTEROL HEMISUCCINATE

MacromoleculeName: CHOLESTEROL HEMISUCCINATE / type: ligand / ID: 5 / Number of copies: 1 / Formula: Y01
Molecular weightTheoretical: 486.726 Da
Chemical component information

ChemComp-Y01:
CHOLESTEROL HEMISUCCINATE

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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

Concentration4 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 64.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
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: 3.22 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 424465
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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