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- PDB-7xun: Structure of ATP7B C983S/C985S/D1027A mutant -

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Basic information

Entry
Database: PDB / ID: 7xun
TitleStructure of ATP7B C983S/C985S/D1027A mutant
ComponentsCopper-transporting ATPase 2
KeywordsTRANSLOCATE / METAT TRANSPORT / P-type Cu(+) transporter / Translocase / METAL TRANSPORT
Function / homology
Function and homology information


protein maturation by copper ion transfer / P-type divalent copper transporter activity / P-type monovalent copper transporter activity / P-type Cu+ transporter / copper ion export / copper ion import / copper ion transmembrane transporter activity / sequestering of calcium ion / copper ion transport / xenobiotic detoxification by transmembrane export across the plasma membrane ...protein maturation by copper ion transfer / P-type divalent copper transporter activity / P-type monovalent copper transporter activity / P-type Cu+ transporter / copper ion export / copper ion import / copper ion transmembrane transporter activity / sequestering of calcium ion / copper ion transport / xenobiotic detoxification by transmembrane export across the plasma membrane / intracellular zinc ion homeostasis / response to copper ion / Ion transport by P-type ATPases / intracellular copper ion homeostasis / lactation / monoatomic ion transmembrane transport / trans-Golgi network membrane / establishment of localization in cell / late endosome / copper ion binding / Golgi membrane / Golgi apparatus / ATP hydrolysis activity / mitochondrion / ATP binding / membrane / plasma membrane
Similarity search - Function
Heavy metal-associated domain, copper ion-binding / P-type ATPase, subfamily IB / Heavy-metal-associated, conserved site / Heavy-metal-associated domain. / Heavy-metal-associated domain / Heavy metal-associated domain superfamily / Heavy-metal-associated domain profile. / Heavy metal-associated domain, HMA / E1-E2 ATPase / P-type ATPase, haloacid dehalogenase domain ...Heavy metal-associated domain, copper ion-binding / P-type ATPase, subfamily IB / Heavy-metal-associated, conserved site / Heavy-metal-associated domain. / Heavy-metal-associated domain / Heavy metal-associated domain superfamily / Heavy-metal-associated domain profile. / Heavy metal-associated domain, HMA / 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
Copper-transporting ATPase 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsYang, G. / Xu, L. / Guo, J. / Wu, Z.
Funding support China, 4items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2020YFA0908501 China
Ministry of Science and Technology (MoST, China)2018YFA0508100 China
National Natural Science Foundation of China (NSFC)31870724 China
National Natural Science Foundation of China (NSFC)81125009 China
CitationJournal: Cell Rep / Year: 2023
Title: Structures of the human Wilson disease copper transporter ATP7B.
Authors: Guo-Min Yang / Lingyi Xu / Rou-Min Wang / Xin Tao / Zi-Wei Zheng / Shenghai Chang / Demin Ma / Cheng Zhao / Yi Dong / Shan Wu / Jiangtao Guo / Zhi-Ying Wu /
Abstract: The P-type ATPase ATP7B exports cytosolic copper and plays an essential role in the regulation of cellular copper homeostasis. Mutants of ATP7B cause Wilson disease (WD), an autosomal recessive ...The P-type ATPase ATP7B exports cytosolic copper and plays an essential role in the regulation of cellular copper homeostasis. Mutants of ATP7B cause Wilson disease (WD), an autosomal recessive disorder of copper metabolism. Here, we present cryoelectron microscopy (cryo-EM) structures of human ATP7B in the E1 state in the apo, the putative copper-bound, and the putative cisplatin-bound forms. In ATP7B, the N-terminal sixth metal-binding domain (MBD6) binds at the cytosolic copper entry site of the transmembrane domain (TMD), facilitating the delivery of copper from the MBD6 to the TMD. The sulfur-containing residues in the TMD of ATP7B mark the copper transport pathway. By comparing structures of the E1 state human ATP7B and E2-P state frog ATP7B, we propose the ATP-driving copper transport model of ATP7B. These structures not only advance our understanding of the mechanisms of ATP7B-mediated copper export but can also guide the development of therapeutics for the treatment of WD.
History
DepositionMay 19, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 26, 2023Provider: repository / Type: Initial release
Revision 1.1May 3, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Copper-transporting ATPase 2


Theoretical massNumber of molelcules
Total (without water)162,0341
Polymers162,0341
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area0 Å2
ΔGint0 kcal/mol
Surface area36550 Å2

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Components

#1: Protein Copper-transporting ATPase 2 / Copper pump 2 / Wilson disease-associated protein


Mass: 162033.516 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ATP7B / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P35670, P-type Cu+ transporter

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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: ATP7BWilson disease protein / Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human) / Cell: HEK293
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: OTHER
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1300 nm / Nominal defocus min: 1100 nm
Image recordingElectron dose: 62 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 338254 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0025689
ELECTRON MICROSCOPYf_angle_d0.5517727
ELECTRON MICROSCOPYf_dihedral_angle_d4.135775
ELECTRON MICROSCOPYf_chiral_restr0.044950
ELECTRON MICROSCOPYf_plane_restr0.004965

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