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- PDB-6wxu: CryoEM structure of mouse DUOX1-DUOXA1 complex in the dimer-of-di... -

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Basic information

Entry
Database: PDB / ID: 6wxu
TitleCryoEM structure of mouse DUOX1-DUOXA1 complex in the dimer-of-dimer state
Components(Dual oxidase ...) x 2
KeywordsMEMBRANE PROTEIN / protein complex / NADPH oxidase / ROS production
Function / homology
Function and homology information


regulation of thyroid hormone generation / Thyroxine biosynthesis / cuticle development / NAD(P)H oxidase (H2O2-forming) / positive regulation of hydrogen peroxide biosynthetic process / hormone biosynthetic process / NAD(P)H oxidase H2O2-forming activity / thyroid hormone generation / hydrogen peroxide biosynthetic process / positive regulation of cell motility ...regulation of thyroid hormone generation / Thyroxine biosynthesis / cuticle development / NAD(P)H oxidase (H2O2-forming) / positive regulation of hydrogen peroxide biosynthetic process / hormone biosynthetic process / NAD(P)H oxidase H2O2-forming activity / thyroid hormone generation / hydrogen peroxide biosynthetic process / positive regulation of cell motility / hydrogen peroxide metabolic process / positive regulation of wound healing / cell leading edge / response to cAMP / positive regulation of neuron differentiation / reactive oxygen species metabolic process / hydrogen peroxide catabolic process / peroxidase activity / cytokine-mediated signaling pathway / positive regulation of reactive oxygen species metabolic process / protein transport / regulation of inflammatory response / response to oxidative stress / apical plasma membrane / heme binding / calcium ion binding / endoplasmic reticulum membrane / cell surface / endoplasmic reticulum / plasma membrane
Similarity search - Function
Dual oxidase maturation factor / Dual oxidase, peroxidase domain / Dual oxidase maturation factor / Ferric reductase, NAD binding domain / : / Ferric reductase NAD binding domain / FAD-binding 8 / FAD-binding domain / Ferric reductase transmembrane component-like domain / Ferric reductase like transmembrane component ...Dual oxidase maturation factor / Dual oxidase, peroxidase domain / Dual oxidase maturation factor / Ferric reductase, NAD binding domain / : / Ferric reductase NAD binding domain / FAD-binding 8 / FAD-binding domain / Ferric reductase transmembrane component-like domain / Ferric reductase like transmembrane component / Myeloperoxidase, subunit C / Haem peroxidase domain superfamily, animal type / Haem peroxidase, animal-type / Haem peroxidase domain superfamily, animal type / Animal haem peroxidase / Animal heme peroxidase superfamily profile. / EF hand domain / Haem peroxidase superfamily / FAD-binding domain, ferredoxin reductase-type / Ferredoxin-NADP reductase (FNR), nucleotide-binding domain / Ferredoxin reductase-type FAD binding domain profile. / Riboflavin synthase-like beta-barrel / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / EF-hand domain pair / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
HEME C / DIUNDECYL PHOSPHATIDYL CHOLINE / 1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE / NAD(P)H oxidase (H2O2-forming) / Dual oxidase maturation factor 1
Similarity search - Component
Biological speciesMus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.7 Å
AuthorsSun, J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)HL143037 United States
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: Structures of mouse DUOX1-DUOXA1 provide mechanistic insights into enzyme activation and regulation.
Authors: Ji Sun /
Abstract: DUOX1, an NADPH oxidase family member, catalyzes the production of hydrogen peroxide. DUOX1 is expressed in various tissues, including the thyroid and respiratory tract, and plays a crucial role in ...DUOX1, an NADPH oxidase family member, catalyzes the production of hydrogen peroxide. DUOX1 is expressed in various tissues, including the thyroid and respiratory tract, and plays a crucial role in processes such as thyroid hormone biosynthesis and innate host defense. DUOX1 co-assembles with its maturation factor DUOXA1 to form an active enzyme complex. However, the molecular mechanisms for activation and regulation of DUOX1 remain mostly unclear. Here, I present cryo-EM structures of the mammalian DUOX1-DUOXA1 complex, in the absence and presence of substrate NADPH, as well as DUOX1-DUOXA1 in an unexpected dimer-of-dimers configuration. These structures reveal atomic details of the DUOX1-DUOXA1 interaction, a lipid-mediated NADPH-binding pocket and the electron transfer path. Furthermore, biochemical and structural analyses indicate that the dimer-of-dimers configuration represents an inactive state of DUOX1-DUOXA1, suggesting an oligomerization-dependent regulatory mechanism. Together, my work provides structural bases for DUOX1-DUOXA1 activation and regulation.
History
DepositionMay 12, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 2, 2020Provider: repository / Type: Initial release
Revision 1.0Sep 2, 2020Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Sep 2, 2020Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
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Revision 1.0Sep 2, 2020Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Sep 2, 2020Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Sep 2, 2020Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Sep 2, 2020Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Mar 17, 2021Group: Database references / Category: citation
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Revision 1.2Oct 30, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
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Revision 1.3May 21, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
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: Dual oxidase 1
B: Dual oxidase maturation factor 1
C: Dual oxidase 1
D: Dual oxidase maturation factor 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)437,49024
Polymers426,7194
Non-polymers10,77020
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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Dual oxidase ... , 2 types, 4 molecules ACBD

#1: Protein Dual oxidase 1


Mass: 175739.812 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Duox1 / Production host: Homo sapiens (human) / References: UniProt: A2AQ92
#2: Protein Dual oxidase maturation factor 1 / Dual oxidase activator 1


Mass: 37619.738 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Duoxa1 / Production host: Homo sapiens (human) / References: UniProt: Q8VE49

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Sugars , 2 types, 12 molecules

#3: Polysaccharide alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1883.668 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-2DManpa1-3[DManpa1-2DManpa1-3[DManpa1-2DManpa1-6]DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,11,10/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3-3-3-3-3-3/a4-b1_b4-c1_c3-d1_c6-g1_d2-e1_e2-f1_g3-h1_g6-j1_h2-i1_j2-k1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}}[(6+1)][a-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}[(6+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}}}}}}LINUCSPDB-CARE
#4: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 3 types, 8 molecules

#5: Chemical
ChemComp-HEC / HEME C


Mass: 618.503 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C34H34FeN4O4 / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-PX2 / 1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE


Mass: 535.671 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C27H52O8P
#7: Chemical ChemComp-PLC / DIUNDECYL PHOSPHATIDYL CHOLINE


Mass: 622.834 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C32H65NO8P / Comment: phospholipid*YM

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Details

Has ligand of interestY
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: mouse DUOX1-DUOXA1 complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.22 MDa / Experimental value: NO
Source (natural)Organism: Mus musculus (house mouse)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 100 %

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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: 65.4 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.17.1_3660: / Classification: refinement
EM software
IDNameVersionCategory
9PHENIXmodel refinement
13cryoSPARC2.133D reconstruction
CTF correctionType: NONE
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 302097 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00618554
ELECTRON MICROSCOPYf_angle_d0.69425322
ELECTRON MICROSCOPYf_dihedral_angle_d18.3966722
ELECTRON MICROSCOPYf_chiral_restr0.0462852
ELECTRON MICROSCOPYf_plane_restr0.0053156

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