+Open data
-Basic information
Entry | Database: PDB / ID: 6t15 | ||||||
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Title | The III2-IV(5B)1 respiratory supercomplex from S. cerevisiae | ||||||
Components |
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Keywords | OXIDOREDUCTASE / CYTOCHROME C OXIDASE CYTOCHROME BC1 MITOCHONDRIA RESPIRATORY CHAIN SUPERCOMPLEX / ELECTRON TRANSPORT / OXIDOREDUCTASE-ELECTRON TRANSPORT COMPLEX | ||||||
Function / homology | Function and homology information : / Complex III assembly / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respiratory chain complex III assembly / mitochondrial respirasome assembly / Mitochondrial protein degradation / : ...: / Complex III assembly / matrix side of mitochondrial inner membrane / protein processing involved in protein targeting to mitochondrion / mitochondrial cytochrome c oxidase assembly / Respiratory electron transport / mitochondrial respiratory chain complex III assembly / mitochondrial respirasome assembly / Mitochondrial protein degradation / : / : / : / cytochrome-c oxidase / quinol-cytochrome-c reductase / ubiquinol-cytochrome-c reductase activity / mitochondrial electron transport, cytochrome c to oxygen / cellular respiration / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial crista / electron transport coupled proton transport / ATP synthesis coupled electron transport / enzyme regulator activity / aerobic respiration / nuclear periphery / proton transmembrane transport / mitochondrial membrane / positive regulation of protein-containing complex assembly / metalloendopeptidase activity / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / mitochondrial inner membrane / oxidoreductase activity / copper ion binding / heme binding / mitochondrion / proteolysis / zinc ion binding / membrane / metal ion binding / cytosol Similarity search - Function | ||||||
Biological species | Saccharomyces cerevisiae S288C (yeast) Saccharomyces cerevisiae S288c (yeast) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.29 Å | ||||||
Authors | Marechal, A. / Pinotsis, N. / Hartley, A. | ||||||
Funding support | United Kingdom, 1items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2020 Title: Rcf2 revealed in cryo-EM structures of hypoxic isoforms of mature mitochondrial III-IV supercomplexes. Authors: Andrew M Hartley / Brigitte Meunier / Nikos Pinotsis / Amandine Maréchal / Abstract: The organization of the mitochondrial electron transport chain proteins into supercomplexes (SCs) is now undisputed; however, their assembly process, or the role of differential expression isoforms, ...The organization of the mitochondrial electron transport chain proteins into supercomplexes (SCs) is now undisputed; however, their assembly process, or the role of differential expression isoforms, remain to be determined. In , cytochrome oxidase (CIV) forms SCs of varying stoichiometry with cytochrome (CIII). Recent studies have revealed, in normoxic growth conditions, an interface made exclusively by Cox5A, the only yeast respiratory protein that exists as one of two isoforms depending on oxygen levels. Here we present the cryo-EM structures of the III-IV and III-IV SCs containing the hypoxic isoform Cox5B solved at 3.4 and 2.8 Å, respectively. We show that the change of isoform does not affect SC formation or activity, and that SC stoichiometry is dictated by the level of CIII/CIV biosynthesis. Comparison of the CIV- and CIV-containing SC structures highlighted few differences, found mainly in the region of Cox5. Additional density was revealed in all SCs, independent of the CIV isoform, in a pocket formed by Cox1, Cox3, Cox12, and Cox13, away from the CIII-CIV interface. In the CIV-containing hypoxic SCs, this could be confidently assigned to the hypoxia-induced gene 1 (Hig1) type 2 protein Rcf2. With conserved residues in mammalian Hig1 proteins and Cox3/Cox12/Cox13 orthologs, we propose that Hig1 type 2 proteins are stoichiometric subunits of CIV, at least when within a III-IV SC. | ||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 6t15.cif.gz | 1.1 MB | Display | PDBx/mmCIF format |
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PDB format | pdb6t15.ent.gz | 905.8 KB | Display | PDB format |
PDBx/mmJSON format | 6t15.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 6t15_validation.pdf.gz | 2.9 MB | Display | wwPDB validaton report |
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Full document | 6t15_full_validation.pdf.gz | 3 MB | Display | |
Data in XML | 6t15_validation.xml.gz | 160 KB | Display | |
Data in CIF | 6t15_validation.cif.gz | 242.9 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/t1/6t15 ftp://data.pdbj.org/pub/pdb/validation_reports/t1/6t15 | HTTPS FTP |
-Related structure data
Related structure data | 10318MC 6t0bC C: citing same article (ref.) M: map data used to model this data |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-CYTOCHROME B-C1 COMPLEX SUBUNIT ... , 9 types, 18 molecules ALBMCNEPFQGRHSITJU
#1: Protein | Mass: 47459.270 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P07256 #2: Protein | Mass: 38751.918 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P07257 #3: Protein | Mass: 43686.590 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00163 #5: Protein | Mass: 20122.955 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P08067, quinol-cytochrome-c reductase #6: Protein | Mass: 17276.074 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00127 #7: Protein | Mass: 14583.755 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00128 #8: Protein | Mass: 10987.511 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P08525 #9: Protein | Mass: 7485.334 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P22289 #10: Protein | Mass: 8602.913 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P37299 |
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-Protein , 3 types, 4 molecules DOlm
#4: Protein | Mass: 27807.395 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P07143 #22: Protein | | Mass: 7461.718 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: Q2V2P9 #23: Protein | | Mass: 25381.139 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P53721 |
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-CYTOCHROME C OXIDASE SUBUNIT ... , 9 types, 9 molecules abcdfgijk
#11: Protein | Mass: 58832.586 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00401, cytochrome-c oxidase |
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#12: Protein | Mass: 26779.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00410, cytochrome-c oxidase |
#13: Protein | Mass: 30383.582 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00420, cytochrome-c oxidase |
#14: Protein | Mass: 14188.949 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P04037, cytochrome-c oxidase |
#16: Protein | Mass: 12641.998 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00427, cytochrome-c oxidase |
#17: Protein | Mass: 6811.154 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P10174, cytochrome-c oxidase |
#19: Protein | Mass: 6471.684 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P07255, cytochrome-c oxidase |
#20: Protein | Mass: 9668.697 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288c (yeast) / References: UniProt: Q01519, cytochrome-c oxidase |
#21: Protein | Mass: 15117.017 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Saccharomyces cerevisiae S288C (yeast) / Gene: COX13, YGL191W, G1341 / Production host: Saccharomyces cerevisiae S288C (yeast) / Variant (production host): W303-1B / References: UniProt: P32799, cytochrome-c oxidase |
-Cytochrome c oxidase ... , 2 types, 2 molecules eh
#15: Protein | Mass: 15325.436 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / References: UniProt: P00425, cytochrome-c oxidase |
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#18: Protein | Mass: 5737.735 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288c (yeast) / References: UniProt: P04039, cytochrome-c oxidase |
-Non-polymers , 11 types, 45 molecules
#24: Chemical | ChemComp-PEF / #25: Chemical | ChemComp-HEM / #26: Chemical | ChemComp-CDL / #27: Chemical | ChemComp-PCF / #28: Chemical | #29: Chemical | #30: Chemical | ChemComp-CU / | #31: Chemical | #32: Chemical | ChemComp-MG / | #33: Chemical | ChemComp-CUA / | #34: Chemical | ChemComp-ZN / | |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: The III2-IV(5B)1 respiratory supercomplex from S. cerevisiae Type: COMPLEX Details: A Delta-cox5a Delta-rox1 strain used for this complex that only expresses Cox5B Entity ID: #1-#23 / Source: NATURAL |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: Saccharomyces cerevisiae S288C (yeast) |
Buffer solution | pH: 7.2 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE Details: 3 microliter of sample applied to negatively glow discharged grid, blot force -10; blotting time 8.5 s |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 56.4 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
Image scans | Movie frames/image: 40 |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.29 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 73042 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 80 / Protocol: RIGID BODY FIT / Space: REAL | ||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6HU9 |