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- PDB-7vgi: Cryo-EM structure of the human P4-type flippase ATP8B1-CDC50A in ... -

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Basic information

Entry
Database: PDB / ID: 7vgi
TitleCryo-EM structure of the human P4-type flippase ATP8B1-CDC50A in the auto-inhibited E2P state
Components
  • Cell cycle control protein 50A
  • Phospholipid-transporting ATPase IC
KeywordsLIPID TRANSPORT/TRANSLOCASE / auto-inhibited / phosphorylated / lipid flippase / LIPID TRANSPORT / LIPID TRANSPORT-TRANSLOCASE complex
Function / homology
Function and homology information


vestibulocochlear nerve formation / regulation of plasma membrane organization / regulation of microvillus assembly / positive regulation of phospholipid translocation / phosphatidylcholine flippase activity / aminophospholipid transport / aminophospholipid flippase activity / phosphatidylserine flippase activity / protein localization to endosome / inner ear receptor cell development ...vestibulocochlear nerve formation / regulation of plasma membrane organization / regulation of microvillus assembly / positive regulation of phospholipid translocation / phosphatidylcholine flippase activity / aminophospholipid transport / aminophospholipid flippase activity / phosphatidylserine flippase activity / protein localization to endosome / inner ear receptor cell development / ATPase-coupled intramembrane lipid transporter activity / phospholipid-translocating ATPase complex / phosphatidylserine floppase activity / positive regulation of protein exit from endoplasmic reticulum / xenobiotic transmembrane transport / phosphatidylcholine floppase activity / stereocilium / apical protein localization / bile acid metabolic process / P-type phospholipid transporter / cardiolipin binding / phospholipid translocation / bile acid and bile salt transport / azurophil granule membrane / transport vesicle membrane / Golgi organization / Ion transport by P-type ATPases / specific granule membrane / regulation of chloride transport / sensory perception of sound / trans-Golgi network / positive regulation of neuron projection development / late endosome membrane / early endosome membrane / monoatomic ion transmembrane transport / nuclear body / apical plasma membrane / negative regulation of DNA-templated transcription / Neutrophil degranulation / structural molecule activity / Golgi apparatus / magnesium ion binding / endoplasmic reticulum / ATP hydrolysis activity / nucleoplasm / 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 / Cation transport ATPase (P-type) / E1-E2 ATPase / 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 / 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 / HAD superfamily / HAD-like superfamily
Similarity search - Domain/homology
Phospholipid-transporting ATPase IC / Cell cycle control protein 50A
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.36 Å
AuthorsChen, M.T. / Chen, Y.
Funding support China, 2items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2019YFA0508500 China
Chinese Academy of SciencesXDB37020202 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Structural insights into the activation of autoinhibited human lipid flippase ATP8B1 upon substrate binding.
Authors: Meng-Ting Cheng / Yu Chen / Zhi-Peng Chen / Xin Liu / Zhiyong Zhang / Yuxing Chen / Wen-Tao Hou / Cong-Zhao Zhou /
Abstract: SignificanceATP8B1 is a P4 ATPase that maintains membrane asymmetry by transporting phospholipids across the cell membrane. Disturbance of lipid asymmetry will lead to the imbalance of the cell ...SignificanceATP8B1 is a P4 ATPase that maintains membrane asymmetry by transporting phospholipids across the cell membrane. Disturbance of lipid asymmetry will lead to the imbalance of the cell membrane and eventually, cell death. Thus, defects in ATP8B1 are usually associated with severe human diseases, such as intrahepatic cholestasis. The present structures of ATP8B1 complexed with its auxiliary noncatalytic partners CDC50A and CDC50B reveal an autoinhibited state of ATP8B1 that could be released upon substrate binding. Moreover, release of this autoinhibition could be facilitated by the bile acids, which are key factors that alter the membrane asymmetry of hepatocytes. This enabled us to figure out a feedback loop of bile acids and lipids across the cell membrane.
History
DepositionSep 16, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Mar 30, 2022Provider: repository / Type: Initial release
Revision 1.1Oct 12, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Cell cycle control protein 50A
B: Phospholipid-transporting ATPase IC
hetero molecules


Theoretical massNumber of molelcules
Total (without water)191,8627
Polymers190,3842
Non-polymers1,4785
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area9960 Å2
ΔGint-38 kcal/mol
Surface area68170 Å2

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein Cell cycle control protein 50A / P4-ATPase flippase complex beta subunit TMEM30A / Transmembrane protein 30A


Mass: 41845.746 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TMEM30A, C6orf67, CDC50A / Production host: Homo sapiens (human) / References: UniProt: Q9NV96
#2: Protein Phospholipid-transporting ATPase IC / ATPase class I type 8B member 1 / Familial intrahepatic cholestasis type 1 / P4-ATPase flippase ...ATPase class I type 8B member 1 / Familial intrahepatic cholestasis type 1 / P4-ATPase flippase complex alpha subunit ATP8B1


Mass: 148538.547 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ATP8B1, ATPIC, FIC1, PFIC / Production host: Homo sapiens (human)
References: UniProt: O43520, P-type phospholipid transporter

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Sugars , 3 types, 4 molecules

#3: 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.: 1
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
#4: Polysaccharide alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1a_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-Manp]{}}}LINUCSPDB-CARE
#5: 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 , 1 types, 1 molecules

#6: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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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: ATP8B1-CDC50A complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 100 %

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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
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.36 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 182618 / Symmetry type: POINT

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