5XTC image
Deposition Date 2017-06-19
Release Date 2017-08-30
Last Version Date 2025-04-09
Entry Detail
PDB ID:
5XTC
Title:
Cryo-EM structure of human respiratory complex I transmembrane arm
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
Resolution:
3.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] iron-sulfur protein 2, mitochondrial
Gene (Uniprot):NDUFS2
Chain IDs:A (auth: Q)
Chain Length:46
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 1
Gene (Uniprot):NDUFA1
Chain IDs:B (auth: S)
Chain Length:318
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 3
Gene (Uniprot):NDUFA3
Chain IDs:C (auth: U)
Chain Length:83
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 11
Gene (Uniprot):NDUFA11
Chain IDs:D (auth: V)
Chain Length:140
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 13
Gene (Uniprot):NDUFA13
Chain IDs:E (auth: W)
Chain Length:116
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Acyl carrier protein, mitochondrial
Gene (Uniprot):NDUFAB1
Chain IDs:F (auth: X)
Chain Length:85
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2, mitochondrial
Gene (Uniprot):NDUFB2
Chain IDs:G (auth: Y)
Chain Length:59
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 3
Gene (Uniprot):NDUFB3
Chain IDs:H (auth: Z)
Chain Length:80
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 5, mitochondrial
Gene (Uniprot):NDUFB5
Chain IDs:I (auth: a)
Chain Length:138
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 6
Gene (Uniprot):NDUFB6
Chain IDs:J (auth: b)
Chain Length:128
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrial
Gene (Uniprot):NDUFB8
Chain IDs:K (auth: c)
Chain Length:153
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 10
Gene (Uniprot):NDUFB10
Chain IDs:L (auth: d)
Chain Length:171
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrial
Gene (Uniprot):NDUFB11
Chain IDs:M (auth: e)
Chain Length:97
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 subunit C1, mitochondrial
Gene (Uniprot):NDUFC1
Chain IDs:N (auth: f)
Chain Length:47
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 subunit C2
Gene (Uniprot):NDUFC2
Chain IDs:O (auth: g)
Chain Length:119
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] iron-sulfur protein 5
Gene (Uniprot):NDUFS5
Chain IDs:P (auth: h)
Chain Length:104
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 2
Chain IDs:Q (auth: i)
Chain Length:347
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 3
Chain IDs:R (auth: j)
Chain Length:115
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 4L
Chain IDs:S (auth: k)
Chain Length:97
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 5
Chain IDs:T (auth: l)
Chain Length:603
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 6
Chain IDs:U (auth: m)
Chain Length:174
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 1
Gene (Uniprot):NDUFB1
Chain IDs:V (auth: n)
Chain Length:56
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 4
Gene (Uniprot):NDUFB4
Chain IDs:W (auth: o)
Chain Length:128
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 9
Gene (Uniprot):NDUFB9
Chain IDs:X (auth: p)
Chain Length:172
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 4
Chain IDs:Y (auth: r)
Chain Length:459
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH-ubiquinone oxidoreductase chain 1
Chain IDs:Z (auth: s)
Chain Length:318
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8
Gene (Uniprot):NDUFA8
Chain IDs:AA (auth: u)
Chain Length:83
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 7
Gene (Uniprot):NDUFB7
Chain IDs:BA (auth: v)
Chain Length:140
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 10, mitochondrial
Gene (Uniprot):NDUFA10
Chain IDs:CA (auth: w)
Chain Length:116
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Architecture of Human Mitochondrial Respiratory Megacomplex I2III2IV2.
Cell 170 1247 1257.e12 (2017)
PMID: 28844695 DOI: 10.1016/j.cell.2017.07.050

Abstact

The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, we examined the human respiratory chain megacomplex-I2III2IV2 (MCI2III2IV2) with 140 subunits and a subset of associated cofactors using cryo-electron microscopy. The MCI2III2IV2 forms a circular structure with the dimeric CIII located in the center, where it is surrounded by two copies each of CI and CIV. Two cytochrome c (Cyt.c) molecules are positioned to accept electrons on the surface of the c1 state CIII dimer. Analyses indicate that CII could insert into the gaps between CI and CIV to form a closed ring, which we termed the electron transport chain supercomplex. The structure not only reveals the precise assignment of individual subunits of human CI and CIII, but also enables future in-depth analysis of the electron transport chain as a whole.

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