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- PDB-7sv7: The complex of phosphorylated human cystic fibrosis transmembrane... -

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Basic information

Entry
Database: PDB / ID: 7sv7
TitleThe complex of phosphorylated human cystic fibrosis transmembrane conductance regulator (CFTR) with ATP/Mg and Tezacaftor (VX-661)
Components(Cystic fibrosis transmembrane conductance ...) x 2
KeywordsATP-BINDING PROTEIN / ABC transporter / ion channel / folding correction / MEMBRANE PROTEIN
Function / homology
Function and homology information


positive regulation of voltage-gated chloride channel activity / : / Sec61 translocon complex binding / channel-conductance-controlling ATPase / intracellularly ATP-gated chloride channel activity / positive regulation of enamel mineralization / transepithelial water transport / RHO GTPases regulate CFTR trafficking / amelogenesis / intracellular pH elevation ...positive regulation of voltage-gated chloride channel activity / : / Sec61 translocon complex binding / channel-conductance-controlling ATPase / intracellularly ATP-gated chloride channel activity / positive regulation of enamel mineralization / transepithelial water transport / RHO GTPases regulate CFTR trafficking / amelogenesis / intracellular pH elevation / chloride channel inhibitor activity / : / Golgi-associated vesicle membrane / multicellular organismal-level water homeostasis / cholesterol transport / bicarbonate transport / bicarbonate transmembrane transporter activity / vesicle docking involved in exocytosis / chloride channel regulator activity / membrane hyperpolarization / chloride transmembrane transporter activity / cholesterol biosynthetic process / sperm capacitation / RHOQ GTPase cycle / chloride channel activity / positive regulation of exocytosis / ATPase-coupled transmembrane transporter activity / positive regulation of insulin secretion involved in cellular response to glucose stimulus / chloride channel complex / ABC-type transporter activity / 14-3-3 protein binding / cellular response to forskolin / chloride transmembrane transport / response to endoplasmic reticulum stress / cellular response to cAMP / PDZ domain binding / establishment of localization in cell / clathrin-coated endocytic vesicle membrane / Defective CFTR causes cystic fibrosis / Late endosomal microautophagy / recycling endosome / ABC-family proteins mediated transport / transmembrane transport / Chaperone Mediated Autophagy / recycling endosome membrane / Aggrephagy / Cargo recognition for clathrin-mediated endocytosis / Clathrin-mediated endocytosis / protein-folding chaperone binding / early endosome membrane / early endosome / endosome membrane / Ub-specific processing proteases / apical plasma membrane / lysosomal membrane / endoplasmic reticulum membrane / enzyme binding / cell surface / protein-containing complex / ATP hydrolysis activity / ATP binding / nucleus / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
: / CFTR regulator domain / Cystic fibrosis TM conductance regulator (CFTR), regulator domain / Cystic fibrosis transmembrane conductance regulator / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site ...: / CFTR regulator domain / Cystic fibrosis TM conductance regulator (CFTR), regulator domain / Cystic fibrosis transmembrane conductance regulator / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / P-loop containing nucleotide triphosphate hydrolases / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Rossmann fold / P-loop containing nucleoside triphosphate hydrolase / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
ADENOSINE-5'-TRIPHOSPHATE / TETRADECANE / CHOLESTEROL / Tezacaftor / DODECANE / nonane / heptadecane / Cystic fibrosis transmembrane conductance regulator
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsFiedorczuk, K. / Chen, J.
Funding support United States, 2items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
Cystic Fibrosis Foundation United States
CitationJournal: Cell / Year: 2022
Title: Mechanism of CFTR correction by type I folding correctors.
Authors: Karol Fiedorczuk / Jue Chen /
Abstract: Small molecule chaperones have been exploited as therapeutics for the hundreds of diseases caused by protein misfolding. The most successful examples are the CFTR correctors, which transformed cystic ...Small molecule chaperones have been exploited as therapeutics for the hundreds of diseases caused by protein misfolding. The most successful examples are the CFTR correctors, which transformed cystic fibrosis therapy. These molecules revert folding defects of the ΔF508 mutant and are widely used to treat patients. To investigate the molecular mechanism of their action, we determined cryo-electron microscopy structures of CFTR in complex with the FDA-approved correctors lumacaftor or tezacaftor. Both drugs insert into a hydrophobic pocket in the first transmembrane domain (TMD1), linking together four helices that are thermodynamically unstable. Mutating residues at the binding site rendered ΔF508-CFTR insensitive to lumacaftor and tezacaftor, underscoring the functional significance of the structural discovery. These results support a mechanism in which the correctors stabilize TMD1 at an early stage of biogenesis, prevent its premature degradation, and thereby allosterically rescuing many disease-causing mutations.
History
DepositionNov 18, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 12, 2022Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
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Revision 1.0Jan 12, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jan 12, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jan 19, 2022Group: Database references / Category: citation
Item: _citation.journal_id_ISSN / _citation.journal_volume ..._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
Revision 2.0Nov 2, 2022Group: Advisory / Atomic model ...Advisory / Atomic model / Author supporting evidence / Data collection / Derived calculations / Non-polymer description / Refinement description / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / em_entity_assembly / em_software / entity / pdbx_contact_author / pdbx_entity_instance_feature / pdbx_nonpoly_scheme / pdbx_poly_seq_scheme / pdbx_struct_conn_angle / pdbx_struct_sheet_hbond / pdbx_validate_close_contact / pdbx_validate_rmsd_angle / pdbx_validate_rmsd_bond / pdbx_validate_torsion / software / struct_conf / struct_conn
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_atom_id / _atom_site.label_atom_id / _atom_site.occupancy / _atom_site.type_symbol / _chem_comp.formula / _chem_comp.formula_weight / _chem_comp.pdbx_synonyms / _em_entity_assembly.entity_id_list / _entity.formula_weight / _pdbx_nonpoly_scheme.auth_mon_id / _pdbx_nonpoly_scheme.auth_seq_num / _pdbx_poly_seq_scheme.auth_mon_id / _pdbx_struct_conn_angle.value / _pdbx_struct_sheet_hbond.range_1_auth_comp_id / _pdbx_struct_sheet_hbond.range_1_auth_seq_id / _pdbx_struct_sheet_hbond.range_1_label_comp_id / _pdbx_struct_sheet_hbond.range_1_label_seq_id / _pdbx_struct_sheet_hbond.range_2_auth_comp_id / _pdbx_struct_sheet_hbond.range_2_auth_seq_id / _pdbx_struct_sheet_hbond.range_2_label_comp_id / _pdbx_struct_sheet_hbond.range_2_label_seq_id / _software.version / _struct_conn.pdbx_dist_value
Description: Ligand identity
Details: Tezacaftor in the original deposition was missing two protons
Provider: author / Type: Coordinate replacement
Revision 2.1Jun 5, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond
Revision 2.2May 21, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1May 21, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

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Assembly

Deposited unit
A: Cystic fibrosis transmembrane conductance regulator
B: Cystic fibrosis transmembrane conductance regulator
hetero molecules


Theoretical massNumber of molelcules
Total (without water)173,53317
Polymers169,7992
Non-polymers3,73315
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Cystic fibrosis transmembrane conductance ... , 2 types, 2 molecules AB

#1: Protein Cystic fibrosis transmembrane conductance regulator / CFTR / ATP-binding cassette sub-family C member 7 / Channel conductance-controlling ATPase / cAMP- ...CFTR / ATP-binding cassette sub-family C member 7 / Channel conductance-controlling ATPase / cAMP-dependent chloride channel


Mass: 168334.469 Da / Num. of mol.: 1 / Mutation: E1371Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CFTR, ABCC7 / Production host: Homo sapiens (human)
References: UniProt: P13569, channel-conductance-controlling ATPase
#2: Protein/peptide Cystic fibrosis transmembrane conductance regulator


Mass: 1464.797 Da / Num. of mol.: 1 / Fragment: unstructured R-domain of CFTR
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Non-polymers , 8 types, 15 molecules

#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#4: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Comment: ATP, energy-carrying molecule*YM
#5: Chemical ChemComp-DD9 / nonane


Mass: 128.255 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C9H20
#6: Chemical
ChemComp-D12 / DODECANE


Mass: 170.335 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C12H26
#7: Chemical ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H46O
#8: Chemical ChemComp-C14 / TETRADECANE


Mass: 198.388 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H30
#9: Chemical ChemComp-PJ8 / heptadecane


Mass: 240.468 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C17H36
#10: Chemical ChemComp-CV6 / Tezacaftor


Mass: 520.498 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C26H27F3N2O6 / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationN
Sequence detailsChain B is R-domain of the CFTR polypeptide chain and is mostly unstructured. It is not possible to ...Chain B is R-domain of the CFTR polypeptide chain and is mostly unstructured. It is not possible to assign it a sequence or correct registry.

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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: The complex of phosphorylated human cystic fibrosis transmembrane conductance regulator (CFTR) with ATP/Mg and Tezacaftor (VX-661)
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 80 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.20.1_4487: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 78019 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0059872
ELECTRON MICROSCOPYf_angle_d0.75213348
ELECTRON MICROSCOPYf_dihedral_angle_d20.853697
ELECTRON MICROSCOPYf_chiral_restr0.2411539
ELECTRON MICROSCOPYf_plane_restr0.0031641

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