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- PDB-5njg: Structure of an ABC transporter: part of the structure that could... -

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Basic information

Entry
Database: PDB / ID: 5njg
TitleStructure of an ABC transporter: part of the structure that could be built de novo
Components
  • 5D3-Fab heavy chain
  • 5D3-Fab light chain
  • ATP-binding cassette sub-family G member 2
KeywordsTRANSPORT PROTEIN / ABC transporter
Function / homology
Function and homology information


biotin transmembrane transporter activity / biotin transport / riboflavin transport / riboflavin transmembrane transporter activity / sphingolipid transporter activity / renal urate salt excretion / Abacavir transmembrane transport / urate metabolic process / urate transmembrane transporter activity / external side of apical plasma membrane ...biotin transmembrane transporter activity / biotin transport / riboflavin transport / riboflavin transmembrane transporter activity / sphingolipid transporter activity / renal urate salt excretion / Abacavir transmembrane transport / urate metabolic process / urate transmembrane transporter activity / external side of apical plasma membrane / sphingolipid biosynthetic process / Sphingolipid de novo biosynthesis / organic anion transport / organic anion transmembrane transporter activity / xenobiotic transport across blood-brain barrier / transepithelial transport / export across plasma membrane / ABC-type xenobiotic transporter / Paracetamol ADME / Ciprofloxacin ADME / NFE2L2 regulating MDR associated enzymes / ABC-type xenobiotic transporter activity / Differentiation of keratinocytes in interfollicular epidermis in mammalian skin / cellular detoxification / Heme biosynthesis / Heme degradation / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / transport across blood-brain barrier / Iron uptake and transport / mitochondrial membrane / brush border membrane / transmembrane transport / membrane raft / apical plasma membrane / protein homodimerization activity / ATP hydrolysis activity / nucleoplasm / ATP binding / identical protein binding / plasma membrane
Similarity search - Function
ABC transporter family G domain / ABC-2 type transporter / : / ABC-2 type transporter / ABC-2 type transporter / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain ...ABC transporter family G domain / ABC-2 type transporter / : / ABC-2 type transporter / ABC-2 type transporter / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Immunoglobulins / Immunoglobulin-like / Sandwich / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Broad substrate specificity ATP-binding cassette transporter ABCG2
Similarity search - Component
Biological speciesHomo sapiens (human)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.78 Å
AuthorsTaylor, N.M.I. / Manolaridis, I. / Jackson, S.M. / Kowal, J. / Stahlberg, H. / Locher, K.P.
Funding support Switzerland, 2items
OrganizationGrant numberCountry
SNSF NCCR TransCure Switzerland
ETH ZurichETH-22-14-1 Switzerland
CitationJournal: Nature / Year: 2017
Title: Structure of the human multidrug transporter ABCG2.
Authors: Nicholas M I Taylor / Ioannis Manolaridis / Scott M Jackson / Julia Kowal / Henning Stahlberg / Kaspar P Locher /
Abstract: ABCG2 is a constitutively expressed ATP-binding cassette (ABC) transporter that protects many tissues against xenobiotic molecules. Its activity affects the pharmacokinetics of commonly used drugs ...ABCG2 is a constitutively expressed ATP-binding cassette (ABC) transporter that protects many tissues against xenobiotic molecules. Its activity affects the pharmacokinetics of commonly used drugs and limits the delivery of therapeutics into tumour cells, thus contributing to multidrug resistance. Here we present the structure of human ABCG2 determined by cryo-electron microscopy, providing the first high-resolution insight into a human multidrug transporter. We visualize ABCG2 in complex with two antigen-binding fragments of the human-specific, inhibitory antibody 5D3 that recognizes extracellular loops of the transporter. We observe two cholesterol molecules bound in the multidrug-binding pocket that is located in a central, hydrophobic, inward-facing translocation pathway between the transmembrane domains. Combined with functional in vitro analyses, our results suggest a multidrug recognition and transport mechanism of ABCG2, rationalize disease-causing single nucleotide polymorphisms and the allosteric inhibition by the 5D3 antibody, and provide the structural basis of cholesterol recognition by other G-subfamily ABC transporters.
History
DepositionMar 28, 2017Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 7, 2017Provider: repository / Type: Initial release
Revision 1.1Jun 28, 2017Group: Database references / Category: citation
Item: _citation.country / _citation.journal_id_ASTM ..._citation.country / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Aug 30, 2017Group: Data collection / Refinement description / Category: em_3d_fitting / em_imaging_optics / em_software
Item: _em_3d_fitting.ref_space / _em_imaging_optics.energyfilter_name ..._em_3d_fitting.ref_space / _em_imaging_optics.energyfilter_name / _em_software.details / _em_software.name
Revision 1.3Oct 23, 2019Group: Data collection / Other / Category: atom_sites / cell
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.Z_PDB
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_close_contact / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.auth_asym_id / _atom_site.auth_seq_id ..._atom_site.auth_asym_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _chem_comp.name / _chem_comp.type / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _entity.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_close_contact.auth_asym_id_2 / _pdbx_validate_close_contact.auth_seq_id_2 / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 23, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_entry_details / pdbx_modification_feature
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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  • Deposited structure unit
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  • Superimposition on EM map
  • EMDB-3654
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Structure viewerMolecule:
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Assembly

Deposited unit
A: ATP-binding cassette sub-family G member 2
B: ATP-binding cassette sub-family G member 2
C: 5D3-Fab heavy chain
D: 5D3-Fab light chain
E: 5D3-Fab heavy chain
F: 5D3-Fab light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)242,5168
Polymers241,6676
Non-polymers8492
Water00
1


  • Idetical with deposited unit
  • defined by software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area11380 Å2
ΔGint-54 kcal/mol
Surface area41970 Å2
MethodPISA

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Components

#1: Protein ATP-binding cassette sub-family G member 2 / Breast cancer resistance protein / CDw338 / Mitoxantrone resistance-associated protein / Placenta- ...Breast cancer resistance protein / CDw338 / Mitoxantrone resistance-associated protein / Placenta-specific ATP-binding cassette transporter / Urate exporter


Mass: 73395.742 Da / Num. of mol.: 2 / Mutation: Has an N-terminal Flag-tag
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ABCG2, ABCP, BCRP, BCRP1, MXR / Cell line (production host): HEK293-EBNA / Production host: Homo sapiens (human) / References: UniProt: Q9UNQ0
#2: Antibody 5D3-Fab heavy chain


Mass: 23843.633 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Cell line (production host): Hybridoma / Production host: Mus musculus (house mouse)
#3: Antibody 5D3-Fab light chain


Mass: 23594.016 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Cell line (production host): Hybridoma / Production host: Mus musculus (house mouse)
#4: 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-Glycam 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
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
Has protein modificationY

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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

Component
IDNameTypeEntity IDParent-IDSource
1Nanodisc-reconstituted ABCG2 in complex with 5D3-FabCOMPLEX#1-#30MULTIPLE SOURCES
2Nanodisc-reconstituted ABCG2COMPLEX#11RECOMBINANT
35D3-FabCOMPLEX#2-#31RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Mus musculus (house mouse)10090
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Mus musculus (house mouse)10090
Buffer solutionpH: 7.5
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE

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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: 67 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
EM imaging opticsEnergyfilter name: GIF Quantum LS
Image scansMovie frames/image: 40 / Used frames/image: 1-40

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Processing

EM software
IDNameCategoryDetails
1Gautomatchparticle selection
2SerialEMimage acquisition
4GctfCTF correction
7Cootmodel fitting
9RELIONinitial Euler assignment
10RELIONfinal Euler assignment
12RELION3D reconstruction
13PHENIXmodel refinementphenix.real_space_refine
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.78 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 97612 / Symmetry type: POINT
Atomic model buildingSpace: REAL

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