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- PDB-8ibg: Respiratory complex CIII2, focus-refined of type II, Wild type mo... -

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Basic information

Entry
Database: PDB / ID: 8ibg
TitleRespiratory complex CIII2, focus-refined of type II, Wild type mouse under cold temperature
Components
  • (Cytochrome b-c1 complex subunit ...) x 8
  • Cytochrome b
  • Cytochrome c1, heme protein, mitochondrial
KeywordsELECTRON TRANSPORT / Respiratory complex / Respiratory supercomplex
Function / homology
Function and homology information


response to D-galactosamine / Complex III assembly / response to mercury ion / subthalamus development / pons development / Respiratory electron transport / response to cobalamin / cerebellar Purkinje cell layer development / mitochondrial respiratory chain complex III assembly / pyramidal neuron development ...response to D-galactosamine / Complex III assembly / response to mercury ion / subthalamus development / pons development / Respiratory electron transport / response to cobalamin / cerebellar Purkinje cell layer development / mitochondrial respiratory chain complex III assembly / pyramidal neuron development / response to alkaloid / cellular respiration / thalamus development / Mitochondrial protein degradation / respiratory chain complex III / quinol-cytochrome-c reductase / response to glucagon / quinol-cytochrome-c reductase activity / response to copper ion / mitochondrial electron transport, ubiquinol to cytochrome c / hypothalamus development / midbrain development / electron transport coupled proton transport / animal organ regeneration / response to hyperoxia / response to cadmium ion / response to hormone / response to activity / respiratory electron transport chain / hippocampus development / response to calcium ion / metalloendopeptidase activity / 2 iron, 2 sulfur cluster binding / response to toxic substance / myelin sheath / response to ethanol / response to hypoxia / mitochondrial inner membrane / response to xenobiotic stimulus / heme binding / ubiquitin protein ligase binding / protein-containing complex binding / mitochondrion / proteolysis / nucleoplasm / metal ion binding / membrane
Similarity search - Function
Cytochrome b-c1 complex subunit 10 / Single alpha-helix domain superfamily / Ubiquinol-cytochrome C reductase complex, 6.4kD protein / Ubiquinol-cytochrome c reductase 8kDa, N-terminal / Ubiquinol-cytochrome c reductase 8 kDa, N-terminal / Globular protein, non-globular alpha/beta subunit / Cytochrome b-c1 complex, subunit 6 / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily ...Cytochrome b-c1 complex subunit 10 / Single alpha-helix domain superfamily / Ubiquinol-cytochrome C reductase complex, 6.4kD protein / Ubiquinol-cytochrome c reductase 8kDa, N-terminal / Ubiquinol-cytochrome c reductase 8 kDa, N-terminal / Globular protein, non-globular alpha/beta subunit / Cytochrome b-c1 complex, subunit 6 / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit 7 superfamily / Ubiquinol-cytochrome C reductase complex 14kD subunit / Cytochrome b-c1 complex subunit 8 superfamily / Cytochrome b-c1 complex subunit Rieske, transmembrane domain / Ubiquinol cytochrome reductase transmembrane region / Cytochrome b-c1 complex subunit 9 / Cytochrome b-c1 complex subunit 9 superfamily / Cytochrome b-c1 complex subunit 9 / Ubiquinol-cytochrome C reductase hinge domain / Ubiquinol-cytochrome C reductase hinge domain superfamily / Ubiquinol-cytochrome C reductase hinge protein / Cytochrome c1, transmembrane anchor, C-terminal / : / Cytochrome b / Ubiquinol-cytochrome c reductase, iron-sulphur subunit / : / Cytochrome c1 / Cytochrome C1 family / : / Cytochrome b/b6, C-terminal / Cytochrome b(C-terminal)/b6/petD / Cytochrome b/b6 C-terminal region profile. / Peptidase M16, zinc-binding site / Insulinase family, zinc-binding region signature. / Cytochrome b/b6, C-terminal domain superfamily / Cytochrome b/b6/petB / Rieske iron-sulphur protein, C-terminal / Cytochrome b/b6, N-terminal / Cytochrome b/b6-like domain superfamily / Cytochrome b/b6 N-terminal region profile. / Di-haem cytochrome, transmembrane / Rieske iron-sulphur protein / Peptidase M16, C-terminal / Peptidase M16 inactive domain / Peptidase M16, N-terminal / Insulinase (Peptidase family M16) / Metalloenzyme, LuxS/M16 peptidase-like / Rieske [2Fe-2S] domain / Rieske [2Fe-2S] iron-sulphur domain / Rieske [2Fe-2S] iron-sulfur domain profile. / Rieske [2Fe-2S] iron-sulphur domain superfamily / Cytochrome c family profile. / Cytochrome c-like domain / Cytochrome c-like domain superfamily
Similarity search - Domain/homology
1,2-Distearoyl-sn-glycerophosphoethanolamine / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / CARDIOLIPIN / HEME C / PROTOPORPHYRIN IX CONTAINING FE / UBIQUINONE-10 / Chem-UQ6 / Cytochrome b / Cytochrome b-c1 complex subunit 6, mitochondrial / Cytochrome b-c1 complex subunit 9 ...1,2-Distearoyl-sn-glycerophosphoethanolamine / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / CARDIOLIPIN / HEME C / PROTOPORPHYRIN IX CONTAINING FE / UBIQUINONE-10 / Chem-UQ6 / Cytochrome b / Cytochrome b-c1 complex subunit 6, mitochondrial / Cytochrome b-c1 complex subunit 9 / Cytochrome b-c1 complex subunit 10 / Cytochrome b-c1 complex subunit 8 / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit Rieske, mitochondrial / Cytochrome b-c1 complex subunit 1, mitochondrial / Cytochrome c1, heme protein, mitochondrial / Cytochrome b-c1 complex subunit 2, mitochondrial
Similarity search - Component
Biological speciesMus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsShin, Y.-C. / Liao, M.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)RO1 DK081418 United States
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)RO1 DK089883 United States
CitationJournal: Cell / Year: 2024
Title: Structural basis of respiratory complex adaptation to cold temperatures.
Authors: Young-Cheul Shin / Pedro Latorre-Muro / Amina Djurabekova / Oleksii Zdorevskyi / Christopher F Bennett / Nils Burger / Kangkang Song / Chen Xu / Joao A Paulo / Steven P Gygi / Vivek Sharma / ...Authors: Young-Cheul Shin / Pedro Latorre-Muro / Amina Djurabekova / Oleksii Zdorevskyi / Christopher F Bennett / Nils Burger / Kangkang Song / Chen Xu / Joao A Paulo / Steven P Gygi / Vivek Sharma / Maofu Liao / Pere Puigserver /
Abstract: In response to cold, mammals activate brown fat for respiratory-dependent thermogenesis reliant on the electron transport chain. Yet, the structural basis of respiratory complex adaptation upon cold ...In response to cold, mammals activate brown fat for respiratory-dependent thermogenesis reliant on the electron transport chain. Yet, the structural basis of respiratory complex adaptation upon cold exposure remains elusive. Herein, we combined thermoregulatory physiology and cryoelectron microscopy (cryo-EM) to study endogenous respiratory supercomplexes from mice exposed to different temperatures. A cold-induced conformation of CI:III (termed type 2) supercomplex was identified with a ∼25° rotation of CIII around its inter-dimer axis, shortening inter-complex Q exchange space, and exhibiting catalytic states that favor electron transfer. Large-scale supercomplex simulations in mitochondrial membranes reveal how lipid-protein arrangements stabilize type 2 complexes to enhance catalytic activity. Together, our cryo-EM studies, multiscale simulations, and biochemical analyses unveil the thermoregulatory mechanisms and dynamics of increased respiratory capacity in brown fat at the structural and energetic level.
History
DepositionFeb 10, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 18, 2024Provider: repository / Type: Initial release
Revision 1.1Oct 30, 2024Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.2Nov 20, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update
Revision 1.3Dec 4, 2024Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
AA: Cytochrome b-c1 complex subunit 1, mitochondrial
AB: Cytochrome b-c1 complex subunit 2, mitochondrial
AC: Cytochrome b
AD: Cytochrome c1, heme protein, mitochondrial
AE: Cytochrome b-c1 complex subunit Rieske, mitochondrial
AF: Cytochrome b-c1 complex subunit 7
AG: Cytochrome b-c1 complex subunit 8
AH: Cytochrome b-c1 complex subunit 6, mitochondrial
AI: Cytochrome b-c1 complex subunit Rieske, mitochondrial
AJ: Cytochrome b-c1 complex subunit 9
AK: Cytochrome b-c1 complex subunit 10
Aa: Cytochrome b-c1 complex subunit 1, mitochondrial
Ab: Cytochrome b-c1 complex subunit 2, mitochondrial
Ac: Cytochrome b
Ad: Cytochrome c1, heme protein, mitochondrial
Ae: Cytochrome b-c1 complex subunit Rieske, mitochondrial
Af: Cytochrome b-c1 complex subunit 7
Ag: Cytochrome b-c1 complex subunit 8
Ah: Cytochrome b-c1 complex subunit 6, mitochondrial
Ai: Cytochrome b-c1 complex subunit Rieske, mitochondrial
Aj: Cytochrome b-c1 complex subunit 9
Ak: Cytochrome b-c1 complex subunit 10
hetero molecules


Theoretical massNumber of molelcules
Total (without water)584,54237
Polymers572,91222
Non-polymers11,62915
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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Cytochrome b-c1 complex subunit ... , 8 types, 18 molecules AAAaABAbAEAIAeAiAFAfAGAgAHAhAJAjAKAk

#1: Protein Cytochrome b-c1 complex subunit 1, mitochondrial / Complex III subunit 1 / Core protein I / Ubiquinol-cytochrome-c reductase complex core protein 1


Mass: 52910.594 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9CZ13
#2: Protein Cytochrome b-c1 complex subunit 2, mitochondrial / Complex III subunit 2 / Core protein II / Ubiquinol-cytochrome-c reductase complex core protein 2


Mass: 48289.730 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9DB77
#5: Protein
Cytochrome b-c1 complex subunit Rieske, mitochondrial / Complex III subunit 5 / Cytochrome b-c1 complex subunit 5 / Rieske iron-sulfur protein / RISP / ...Complex III subunit 5 / Cytochrome b-c1 complex subunit 5 / Rieske iron-sulfur protein / RISP / Rieske protein UQCRFS1 / Ubiquinol-cytochrome c reductase iron-sulfur subunit


Mass: 29406.635 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9CR68, quinol-cytochrome-c reductase
#6: Protein Cytochrome b-c1 complex subunit 7


Mass: 13587.532 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9CQB4
#7: Protein Cytochrome b-c1 complex subunit 8 / Complex III subunit 8 / Complex III subunit VIII / Ubiquinol-cytochrome c reductase complex 9.5 kDa ...Complex III subunit 8 / Complex III subunit VIII / Ubiquinol-cytochrome c reductase complex 9.5 kDa protein / Ubiquinol-cytochrome c reductase complex ubiquinone-binding protein QP-C


Mass: 9783.245 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9CQ69
#8: Protein Cytochrome b-c1 complex subunit 6, mitochondrial / Complex III subunit 6 / Complex III subunit VIII / Cytochrome c1 non-heme 11 kDa protein / ...Complex III subunit 6 / Complex III subunit VIII / Cytochrome c1 non-heme 11 kDa protein / Mitochondrial hinge protein / Ubiquinol-cytochrome c reductase complex 11 kDa protein


Mass: 10452.694 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: P99028
#9: Protein Cytochrome b-c1 complex subunit 9 / Complex III subunit 9 / Complex III subunit X / Cytochrome c1 non-heme 7 kDa protein / Ubiquinol- ...Complex III subunit 9 / Complex III subunit X / Cytochrome c1 non-heme 7 kDa protein / Ubiquinol-cytochrome c reductase complex 7.2 kDa protein


Mass: 7457.526 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q8R1I1
#10: Protein Cytochrome b-c1 complex subunit 10 / Complex III subunit 10 / Complex III subunit XI / Ubiquinol-cytochrome c reductase complex 6.4 kDa protein


Mass: 6546.627 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9CPX8

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Protein , 2 types, 4 molecules ACAcADAd

#3: Protein Cytochrome b / Complex III subunit 3 / Complex III subunit III / Cytochrome b-c1 complex subunit 3 / Ubiquinol- ...Complex III subunit 3 / Complex III subunit III / Cytochrome b-c1 complex subunit 3 / Ubiquinol-cytochrome-c reductase complex cytochrome b subunit


Mass: 43240.305 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: P00158
#4: Protein Cytochrome c1, heme protein, mitochondrial / Complex III subunit 4 / Complex III subunit IV / Cytochrome b-c1 complex subunit 4 / Ubiquinol- ...Complex III subunit 4 / Complex III subunit IV / Cytochrome b-c1 complex subunit 4 / Ubiquinol-cytochrome-c reductase complex cytochrome c1 subunit / Cytochrome c-1


Mass: 35374.652 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: Q9D0M3, quinol-cytochrome-c reductase

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Non-polymers , 7 types, 15 molecules

#11: Chemical
ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C34H32FeN4O4 / Feature type: SUBJECT OF INVESTIGATION
#12: Chemical ChemComp-UQ6 / 5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)-2,3-DIMETHOXY-6-METHYL-BENZENE-1,4-DIOL


Mass: 592.891 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C39H60O4 / Feature type: SUBJECT OF INVESTIGATION
#13: Chemical ChemComp-HEC / HEME C


Mass: 618.503 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C34H34FeN4O4 / Feature type: SUBJECT OF INVESTIGATION
#14: Chemical ChemComp-3PE / 1,2-Distearoyl-sn-glycerophosphoethanolamine / 3-SN-PHOSPHATIDYLETHANOLAMINE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE


Mass: 748.065 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C41H82NO8P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM
#15: Chemical ChemComp-U10 / UBIQUINONE-10 / Coenzyme Q10


Mass: 863.343 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C59H90O4 / Feature type: SUBJECT OF INVESTIGATION
#16: Chemical ChemComp-3PH / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / PHOSPHATIDIC ACID


Mass: 704.998 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C39H77O8P / Feature type: SUBJECT OF INVESTIGATION
#17: Chemical ChemComp-CDL / CARDIOLIPIN / DIPHOSPHATIDYL GLYCEROL / BIS-(1,2-DIACYL-SN-GLYCERO-3-PHOSPHO)-1',3'-SN-GLYCEROL


Mass: 1464.043 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C81H156O17P2 / Feature type: SUBJECT OF INVESTIGATION / 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: Respiratory Supercomplex CI:CIII2 / Type: COMPLEX / Entity ID: #1-#10 / Source: NATURAL
Molecular weightValue: 1.32 MDa / Experimental value: NO
Source (natural)Organism: Mus musculus (house mouse)
Buffer solutionpH: 8
SpecimenConc.: 0.33 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: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: OTHER / Nominal defocus max: 2200 nm / Nominal defocus min: 1000 nm
Image recording
IDImaging-IDElectron dose (e/Å2)Film or detector model
1146.1GATAN K3 (6k x 4k)
2145.9GATAN K3 (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 177076 / Symmetry type: POINT

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