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- PDB-8eiq: The complex of phosphorylated human delta F508 cystic fibrosis tr... -

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Entry
Database: PDB / ID: 8eiq
TitleThe complex of phosphorylated human delta F508 cystic fibrosis transmembrane conductance regulator (CFTR) with Trikafta [elexacaftor (VX-445), tezacaftor (VX-661), ivacaftor (VX-770)] and ATP/Mg
Components(Cystic fibrosis transmembrane conductance ...) x 2
KeywordsATP-Binding Protein / ABC transporter / ion channel / Trikafta / 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 / chloride channel regulator activity / vesicle docking involved in exocytosis / membrane hyperpolarization / chloride transmembrane transporter activity / sperm capacitation / cholesterol biosynthetic process / RHOQ GTPase cycle / chloride channel activity / positive regulation of exocytosis / ATPase-coupled transmembrane transporter activity / chloride channel complex / ABC-type transporter activity / positive regulation of insulin secretion involved in cellular response to glucose stimulus / 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 / recycling endosome membrane / Chaperone Mediated Autophagy / 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 / cytoplasm / cytosol
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 / CHOLESTEROL / Tezacaftor / DODECANE / Chem-VX7 / Chem-WJX / Cystic fibrosis transmembrane conductance regulator
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 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: Science / Year: 2022
Title: Molecular structures reveal synergistic rescue of Δ508 CFTR by Trikafta modulators.
Authors: Karol Fiedorczuk / Jue Chen /
Abstract: The predominant mutation causing cystic fibrosis, a deletion of phenylalanine 508 (Δ508) in the cystic fibrosis transmembrane conductance regulator (CFTR), leads to severe defects in CFTR biogenesis ...The predominant mutation causing cystic fibrosis, a deletion of phenylalanine 508 (Δ508) in the cystic fibrosis transmembrane conductance regulator (CFTR), leads to severe defects in CFTR biogenesis and function. The advanced therapy Trikafta combines the folding corrector tezacaftor (VX-661), the channel potentiator ivacaftor (VX-770), and the dual-function modulator elexacaftor (VX-445). However, it is unclear how elexacaftor exerts its effects, in part because the structure of Δ508 CFTR is unknown. Here, we present cryo-electron microscopy structures of Δ508 CFTR in the absence and presence of CFTR modulators. When used alone, elexacaftor partially rectified interdomain assembly defects in Δ508 CFTR, but when combined with a type I corrector, did so fully. These data illustrate how the different modulators in Trikafta synergistically rescue Δ508 CFTR structure and function.
History
DepositionSep 15, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 19, 2022Provider: repository / Type: Initial release
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Revision 2.0Nov 2, 2022Group: Atomic model / Non-polymer description / Structure summary
Category: atom_site / chem_comp / entity
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.type_symbol / _chem_comp.formula / _chem_comp.formula_weight / _chem_comp.pdbx_synonyms / _entity.formula_weight
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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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)172,69811
Polymers169,5672
Non-polymers3,1319
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
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: 168187.297 Da / Num. of mol.: 1 / Mutation: E1370Q
Source method: isolated from a genetically manipulated source
Details: human CFTR with F508 deletion and E1370Q substitution
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: 1379.692 Da / Num. of mol.: 1 / Mutation: E1371Q
Source method: isolated from a genetically manipulated source
Details: R-domain of del508CFTR (UNP:P13569). Expressed construct is human CFTR with F508 deletion and E1371Q substitution.
Source: (gene. exp.) Homo sapiens (human) / Gene: CFTR, ABCC7 / Production host: Homo sapiens (human) / References: channel-conductance-controlling ATPase

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Non-polymers , 7 types, 9 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-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H46O
#6: Chemical ChemComp-D12 / DODECANE


Mass: 170.335 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C12H26
#7: Chemical ChemComp-VX7 / N-(2,4-di-tert-butyl-5-hydroxyphenyl)-4-oxo-1,4-dihydroquinoline-3-carboxamide


Mass: 392.491 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C24H28N2O3
#8: Chemical ChemComp-WJX / (6P)-N-(1,3-dimethyl-1H-pyrazole-4-sulfonyl)-6-[3-(3,3,3-trifluoro-2,2-dimethylpropoxy)-1H-pyrazol-1-yl]-2-[(4S)-2,2,4-trimethylpyrrolidin-1-yl]pyridine-3-carboxamide / Elexacaftor


Mass: 597.653 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C26H34F3N7O4S / Feature type: SUBJECT OF INVESTIGATION
#9: 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

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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 delta F508 cystic fibrosis transmembrane conductance regulator (CFTR) with Trikafta [elexacaftor (VX-445), tezacaftor (VX-661), ivacaftor (VX-770)] and ATP/Mg
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.168 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenConc.: 5 mg/ml / Embedding 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: 1800 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 65.6 e/Å2 / Film or detector model: GATAN K3 (6k 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 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 243682 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0039786
ELECTRON MICROSCOPYf_angle_d0.90113275
ELECTRON MICROSCOPYf_dihedral_angle_d11.4583650
ELECTRON MICROSCOPYf_chiral_restr0.0651531
ELECTRON MICROSCOPYf_plane_restr0.0031701

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