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- PDB-6hij: Cryo-EM structure of the human ABCG2-MZ29-Fab complex with choles... -

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Basic information

Entry
Database: PDB / ID: 6hij
TitleCryo-EM structure of the human ABCG2-MZ29-Fab complex with cholesterol and PE lipids docked
ComponentsATP-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 / sphingolipid biosynthetic process ...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 / sphingolipid biosynthetic process / external side of apical plasma membrane / Sphingolipid de novo biosynthesis / organic anion transport / xenobiotic transport across blood-brain barrier / organic anion transmembrane transporter activity / transepithelial transport / export across plasma membrane / Ciprofloxacin ADME / Paracetamol ADME / ABC-type xenobiotic transporter / NFE2L2 regulating MDR associated enzymes / Differentiation of Keratinocytes in Interfollicular Epidermis in Mammalian Skin / cellular detoxification / Heme biosynthesis / ABC-type xenobiotic transporter activity / Heme degradation / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / transport across blood-brain barrier / Iron uptake and transport / brush border membrane / mitochondrial membrane / transmembrane transport / apical plasma membrane / membrane raft / 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 / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Chem-BWQ / CHOLESTEROL / 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine / Broad substrate specificity ATP-binding cassette transporter ABCG2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.56 Å
AuthorsJackson, S.M. / Manolaridis, I. / Kowal, J. / Zechner, M. / Taylor, N.M.I. / Bause, M. / Bauer, S. / Bartholomaeus, R. / Stahlberg, H. / Bernhardt, G. ...Jackson, S.M. / Manolaridis, I. / Kowal, J. / Zechner, M. / Taylor, N.M.I. / Bause, M. / Bauer, S. / Bartholomaeus, R. / Stahlberg, H. / Bernhardt, G. / Koenig, B. / Buschauer, A. / Altmann, K.H. / Locher, K.P.
Funding support Switzerland, 2items
OrganizationGrant numberCountry
Swiss National Science Foundation Switzerland
ETH-22-14-1 Switzerland
CitationJournal: Nat Struct Mol Biol / Year: 2018
Title: Structural basis of small-molecule inhibition of human multidrug transporter ABCG2.
Authors: Scott M Jackson / Ioannis Manolaridis / Julia Kowal / Melanie Zechner / Nicholas M I Taylor / Manuel Bause / Stefanie Bauer / Ruben Bartholomaeus / Guenther Bernhardt / Burkhard Koenig / ...Authors: Scott M Jackson / Ioannis Manolaridis / Julia Kowal / Melanie Zechner / Nicholas M I Taylor / Manuel Bause / Stefanie Bauer / Ruben Bartholomaeus / Guenther Bernhardt / Burkhard Koenig / Armin Buschauer / Henning Stahlberg / Karl-Heinz Altmann / Kaspar P Locher /
Abstract: ABCG2 is an ATP-binding cassette (ABC) transporter that protects tissues against xenobiotics, affects the pharmacokinetics of drugs and contributes to multidrug resistance. Although many inhibitors ...ABCG2 is an ATP-binding cassette (ABC) transporter that protects tissues against xenobiotics, affects the pharmacokinetics of drugs and contributes to multidrug resistance. Although many inhibitors and modulators of ABCG2 have been developed, understanding their structure-activity relationship requires high-resolution structural insight. Here, we present cryo-EM structures of human ABCG2 bound to synthetic derivatives of the fumitremorgin C-related inhibitor Ko143 or the multidrug resistance modulator tariquidar. Both compounds are bound to the central, inward-facing cavity of ABCG2, blocking access for substrates and preventing conformational changes required for ATP hydrolysis. The high resolutions allowed for de novo building of the entire transporter and also revealed tightly bound phospholipids and cholesterol interacting with the lipid-exposed surface of the transmembrane domains (TMDs). Extensive chemical modifications of the Ko143 scaffold combined with in vitro functional analyses revealed the details of ABCG2 interactions with this compound family and provide a basis for the design of novel inhibitors and modulators.
History
DepositionAug 30, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 19, 2018Provider: repository / Type: Initial release
Revision 1.1Apr 3, 2019Group: Data collection / Database references / Category: citation / citation_author / pdbx_database_proc
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _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
Revision 1.2Dec 11, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]
Revision 2.0Apr 9, 2025Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Non-polymer description / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / chem_comp_atom / chem_comp_bond / database_2 / entity / pdbx_entity_nonpoly / pdbx_entry_details / pdbx_modification_feature / pdbx_unobs_or_zero_occ_atoms
Item: _atom_site.Cartn_x / _atom_site.Cartn_y ..._atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_atom_id / _atom_site.label_atom_id / _atom_site.type_symbol / _chem_comp.formula / _chem_comp.formula_weight / _chem_comp.mon_nstd_flag / _chem_comp.name / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _entity.formula_weight / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _pdbx_unobs_or_zero_occ_atoms.auth_atom_id / _pdbx_unobs_or_zero_occ_atoms.label_atom_id

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Structure visualization

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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
hetero molecules


Theoretical massNumber of molelcules
Total (without water)155,63822
Polymers144,7722
Non-polymers10,86620
Water00
1


  • Idetical with deposited unit
  • defined by software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area19670 Å2
ΔGint-145 kcal/mol
Surface area46510 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: 72385.852 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ABCG2, ABCP, BCRP, BCRP1, MXR / Production host: Homo sapiens (human) / References: UniProt: Q9UNQ0
#2: Chemical
ChemComp-PEE / 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine / DOPE


Mass: 744.034 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C41H78NO8P / Comment: DOPE, phospholipid*YM
#3: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: C27H46O
#4: Chemical ChemComp-BWQ / ~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methylpropyl)-4,7-bis(oxidanylidene)-3,6,17-triazatetracyclo[8.7.0.0^{3,8}.0^{11,16}]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate


Mass: 523.664 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C30H41N3O5
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

ComponentName: ATP-binding cassette sub-family G member 2 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenConc.: 0.4 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: 100 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.12_2829: / Classification: refinement
EM software
IDNameCategory
1Gautomatchparticle selection
4CTFFINDCTF correction
10RELIONinitial Euler assignment
11RELIONfinal Euler assignment
12RELIONclassification
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 2098186
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.56 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 402348 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0099795
ELECTRON MICROSCOPYf_angle_d1.47113254
ELECTRON MICROSCOPYf_dihedral_angle_d7.3975940
ELECTRON MICROSCOPYf_chiral_restr0.0891528
ELECTRON MICROSCOPYf_plane_restr0.0071576

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