6QC2 image
Deposition Date 2018-12-26
Release Date 2019-08-21
Last Version Date 2025-12-17
Entry Detail
PDB ID:
6QC2
Keywords:
ELECTRON TRANSPORT
Title:
Ovine respiratory supercomplex I+III2 open class 2
Biological Source:
Source Organism:
Ovis aries (Taxon ID: 9940)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
4.20 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6QC2 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 4L
Gene (Uniprot):MT-ND4L
Chain IDs:D (auth: 4L)
Chain Length:98
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78754 Pfam ID:PF00420
Polymer Type:polypeptide(L)
Molecule:NDUFA1
Chain IDs:BA (auth: A1)
Chain Length:446
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2
Chain IDs:HB (auth: A2)
Chain Length:439
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit A3
Chain IDs:O (auth: A3)
Chain Length:83
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFA5
Chain IDs:IB (auth: A5)
Chain Length:115
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit A6
Gene (Uniprot):NDUFA6
Chain IDs:JB (auth: A6)
Chain Length:127
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5QC06 Pfam ID:PF05347
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NDUFA7
Gene (Uniprot):NDUFA7
Chain IDs:KB (auth: A7)
Chain Length:112
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5P0I2 Pfam ID:PF07347
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8
Chain IDs:K (auth: A8)
Chain Length:171
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit A9
Chain IDs:GB (auth: A9)
Chain Length:338
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Acyl carrier protein
Chain IDs:J (auth: AB), MB (auth: AA)
Chain Length:88
Number of Molecules:2
Biological Source:Ovis aries
UniProt ID:W5NQT7 Pfam ID:PF00550
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 10, mitochondrial
Chain IDs:M (auth: AJ)
Chain Length:320
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFA11
Chain IDs:H (auth: AK)
Chain Length:140
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12
Chain IDs:LB (auth: AL)
Chain Length:145
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFA13
Chain IDs:S (auth: AM)
Chain Length:143
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NDUFB1
Gene (Uniprot):LOC114115567
Chain IDs:AA (auth: B1)
Chain Length:379
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5QG39 Pfam ID:PF08040
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B2
Chain IDs:W (auth: B2)
Chain Length:72
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B3
Chain IDs:P (auth: B3)
Chain Length:97
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B4
Gene (Uniprot):NDUFB4
Chain IDs:R (auth: B4)
Chain Length:128
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5QF73 Pfam ID:PF07225
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B5
Chain IDs:I (auth: B5)
Chain Length:143
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NDUFB6
Gene (Uniprot):NDUFB6
Chain IDs:T (auth: B6)
Chain Length:127
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5PZE3 Pfam ID:PF09782
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B7
Chain IDs:U (auth: B7)
Chain Length:119
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrial
Gene (Uniprot):NDUFB8
Chain IDs:X (auth: B8)
Chain Length:158
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5Q1B0 Pfam ID:PF05821
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit B9
Chain IDs:V (auth: B9)
Chain Length:178
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFB10
Chain IDs:L (auth: BJ)
Chain Length:175
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFB11
Chain IDs:Y (auth: BK)
Chain Length:125
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFC1
Chain IDs:Z (auth: C1)
Chain Length:240
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 subunit C2
Gene (Uniprot):NDUFC2
Chain IDs:Q (auth: C2)
Chain Length:120
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5P9Q8 Pfam ID:PF06374
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 1
Gene (Uniprot):MT-ND1
Chain IDs:B (auth: D1)
Chain Length:110
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78747 Pfam ID:PF00146
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 2
Gene (Uniprot):MT-ND2
Chain IDs:G (auth: D2)
Chain Length:347
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78748 Pfam ID:PF00361, PF06444
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 3
Gene (Uniprot):MT-ND3
Chain IDs:A (auth: D3)
Chain Length:115
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78753 Pfam ID:PF00507
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 4
Gene (Uniprot):MT-ND4
Chain IDs:F (auth: D4)
Chain Length:459
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78755 Pfam ID:PF01059, PF00361
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 5
Gene (Uniprot):MT-ND5
Chain IDs:E (auth: D5)
Chain Length:606
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78756 Pfam ID:PF00662, PF00361, PF06455
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 6
Gene (Uniprot):MT-ND6
Chain IDs:C (auth: D6)
Chain Length:175
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:O78757 Pfam ID:PF00499
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase core subunit S1
Chain IDs:YA (auth: S1)
Chain Length:704
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFS2
Chain IDs:ZA (auth: S2)
Chain Length:430
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase core subunit S3
Gene (Uniprot):NDUFS3
Chain IDs:AB (auth: S3)
Chain Length:228
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5PB27 Pfam ID:PF00329
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit S4
Gene (Uniprot):NDUFS4
Chain IDs:FB (auth: S4)
Chain Length:133
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5PE07 Pfam ID:PF04800
Polymer Type:polypeptide(L)
Molecule:NADH:ubiquinone oxidoreductase subunit S5
Chain IDs:N (auth: S5)
Chain Length:105
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFS6
Chain IDs:EB (auth: S6)
Chain Length:96
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFS7
Chain IDs:BB (auth: S7)
Chain Length:179
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:NDUFS8
Chain IDs:CB (auth: S8)
Chain Length:176
Number of Molecules:1
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrial
Gene (Uniprot):NDUFV1
Chain IDs:WA (auth: V1)
Chain Length:445
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5PUX0 Pfam ID:PF01512, PF22461, PF10589
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NDUFV2
Gene (Uniprot):NDUFV2
Chain IDs:XA (auth: V2)
Chain Length:217
Number of Molecules:1
Biological Source:Ovis aries
UniProt ID:W5NRY1 Pfam ID:PF01257
Polymer Type:polypeptide(L)
Molecule:NDUFV3
Chain IDs:DB (auth: V3)
Chain Length:75
Number of Molecules:1
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:UQCRC1
Chain IDs:CA (auth: a1), MA (auth: a3)
Chain Length:446
Number of Molecules:2
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:Ubiquinol-cytochrome c reductase core protein 2
Chain IDs:DA (auth: a2), NA (auth: a4)
Chain Length:439
Number of Molecules:2
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cytochrome b
Gene (Uniprot):MT-CYB
Chain IDs:EA (auth: b1), OA (auth: b2)
Chain Length:379
Number of Molecules:2
Biological Source:Ovis aries
UniProt ID:P24959 Pfam ID:PF00033, PF00032
Polymer Type:polypeptide(L)
Molecule:Cytochrome c1
Chain IDs:FA (auth: c1), PA (auth: c2)
Chain Length:240
Number of Molecules:2
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:UQCRB
Chain IDs:HA (auth: d1), RA (auth: d2)
Chain Length:110
Number of Molecules:2
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:Cytochrome b-c1 complex subunit Rieske, mitochondrial
Chain IDs:GA (auth: f1), QA (auth: f2)
Chain Length:196
Number of Molecules:2
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:UQCRQH
Chain IDs:JA (auth: h1), TA (auth: h2)
Chain Length:78
Number of Molecules:2
Biological Source:Ovis aries
Polymer Type:polypeptide(L)
Molecule:Ubiquinol-cytochrome c reductase, complex III subunit X
Chain IDs:LA (auth: i1), VA (auth: i2)
Chain Length:63
Number of Molecules:2
Biological Source:Ovis aries
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ubiquinol-cytochrome c reductase complex III subunit VII
Gene (Uniprot):LOC101121420
Chain IDs:IA (auth: q1), SA (auth: q2)
Chain Length:81
Number of Molecules:2
Biological Source:Ovis aries
UniProt ID:W5PUP9 Pfam ID:PF02939
Polymer Type:polypeptide(L)
Molecule:UQCRFS1N
Chain IDs:KA (auth: x1), UA (auth: x2)
Chain Length:78
Number of Molecules:2
Biological Source:Ovis aries
Ligand Molecules
3PE
CDL
FES
FMN
HEC
HEM
NDP
PC1
SF4
ZMP
ZN
Primary Citation
Structures of Respiratory Supercomplex I+III2Reveal Functional and Conformational Crosstalk.
Mol.Cell 75 1131 1146.e6 (2019)
PMID: 31492636 DOI: 10.1016/j.molcel.2019.07.022

Abstact

The mitochondrial electron transport chain complexes are organized into supercomplexes (SCs) of defined stoichiometry, which have been proposed to regulate electron flux via substrate channeling. We demonstrate that CoQ trapping in the isolated SC I+III2 limits complex (C)I turnover, arguing against channeling. The SC structure, resolved at up to 3.8 Å in four distinct states, suggests that CoQ oxidation may be rate limiting because of unequal access of CoQ to the active sites of CIII2. CI shows a transition between "closed" and "open" conformations, accompanied by the striking rotation of a key transmembrane helix. Furthermore, the state of CI affects the conformational flexibility within CIII2, demonstrating crosstalk between the enzymes. CoQ was identified at only three of the four binding sites in CIII2, suggesting that interaction with CI disrupts CIII2 symmetry in a functionally relevant manner. Together, these observations indicate a more nuanced functional role for the SCs.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
6QBX
6Q9D
6Q9B
6Q9E
6QA9
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