8GYM

Cryo-EM structure of Tetrahymena thermophila respiratory mega-complex MC IV2+(I+III2+II)2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.96 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structures of Tetrahymena thermophila respiratory megacomplexes on the tubular mitochondrial cristae.

Han, F.Hu, Y.Wu, M.He, Z.Tian, H.Zhou, L.

(2023) Nat Commun 14: 2542-2542

  • DOI: https://doi.org/10.1038/s41467-023-38158-5
  • Primary Citation of Related Structures:  
    8GYM, 8GZU

  • PubMed Abstract: 

    Tetrahymena thermophila, a classic ciliate model organism, has been shown to possess tubular mitochondrial cristae and highly divergent electron transport chain involving four transmembrane protein complexes (I-IV). Here we report cryo-EM structures of its ~8 MDa megacomplex IV 2  + (I + III 2  + II) 2 , as well as a ~ 10.6 MDa megacomplex (IV 2  + I + III 2  + II) 2 at lower resolution. In megacomplex IV 2  + (I + III 2  + II) 2 , each CIV 2 protomer associates one copy of supercomplex I + III 2 and one copy of CII, forming a half ring-shaped architecture that adapts to the membrane curvature of mitochondrial cristae. Megacomplex (IV 2  + I + III 2  + II) 2 defines the relative position between neighbouring half rings and maintains the proximity between CIV 2 and CIII 2 cytochrome c binding sites. Our findings expand the current understanding of divergence in eukaryotic electron transport chain organization and how it is related to mitochondrial morphology.


  • Organizational Affiliation

    Department of Biophysics, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, 310058, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tim10/DDP family zinc finger proteinA [auth 1t],
EF [auth 1T]
72Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
NmrA domain-containing proteinB [auth 2e],
FF [auth 2E]
322Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeC [auth 2f],
GF [auth 2F]
296Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
SDHTT3D [auth 2g],
HF [auth 2G]
198Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Diphthamide synthesis proteinE [auth 2h],
IF [auth 2H]
195Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
DUF4885 domain-containing proteinF [auth 2i],
JF [auth 2I]
114Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeG [auth 2j],
KF [auth 2J]
103Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeH [auth 2k],
LF [auth 2K]
93Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
TransposaseI [auth 2l],
MF [auth 2L]
89Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeJ [auth 2m],
NF [auth 2M]
76Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeK [auth 2n],
OF [auth 2N]
62Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
SDHTT11L [auth 2o],
PF [auth 2O]
46Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Zf-Tim10_DDP domain-containing proteinM [auth 2t],
QF [auth 2T]
72Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
Zf-Tim10_DDP domain-containing proteinN [auth 3t],
RF [auth 3T]
93Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Phage proteinO [auth 4a],
SF [auth 4A]
127Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
TransposaseP [auth 4t],
TF [auth 4T]
68Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Cullin domain-containing proteinQ [auth 5t],
UF [auth 5T]
81Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeR [auth 6a],
VF [auth 6A]
130Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
Structural proteinS [auth 6b],
WF [auth 6B]
230Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeT [auth 6c],
XF [auth 6C]
103Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 21
MoleculeChains Sequence LengthOrganismDetailsImage
Decapping nucleaseU [auth 6l],
YF [auth 6L]
88Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 22
MoleculeChains Sequence LengthOrganismDetailsImage
AnnexinV [auth 6t],
ZF [auth 6T]
72Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 23
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeAG [auth 7A],
W [auth 7a]
133Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 24
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrialBG [auth 7C],
X [auth 7c]
236Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 25
MoleculeChains Sequence LengthOrganismDetailsImage
CTF/NF-I domain-containing proteinCG [auth 7L],
Y [auth 7l]
990Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 26
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeDG [auth A],
Z [auth a]
490Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 27
MoleculeChains Sequence LengthOrganismDetailsImage
Protein phosphatase 2C, putativeAA [auth b],
EG [auth B]
473Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 28
MoleculeChains Sequence LengthOrganismDetailsImage
Chromosome condensation regulator RCC1 repeat proteinBA [auth bp],
FG [auth BP]
462Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 29
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 1CA [auth c1],
GG [auth C1]
688Tetrahymena thermophila SB210Mutation(s): 0 
EC: 7.1.1.9
Membrane Entity: Yes 
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Entity ID: 30
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 2DA [auth c2],
HG [auth C2]
604Tetrahymena thermophila SB210Mutation(s): 0 
EC: 1.9.3.1
Membrane Entity: Yes 
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Entity ID: 31
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf68EA [auth c3],
IG [auth C3]
594Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 32
MoleculeChains Sequence LengthOrganismDetailsImage
SURF1-like proteinFA [auth d],
JG [auth D]
402Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 33
MoleculeChains Sequence LengthOrganismDetailsImage
TraB family proteinGA [auth e],
KG [auth E]
385Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 34
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeHA [auth f],
LG [auth F]
348Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 35
MoleculeChains Sequence LengthOrganismDetailsImage
Iron-binding zinc finger CDGSH type proteinIA [auth fs],
MG [auth FS]
188Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 36
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8, mitochondrialJA [auth g],
NG [auth G]
318Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 37
MoleculeChains Sequence LengthOrganismDetailsImage
SURF1-like proteinKA [auth h],
OG [auth H]
318Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
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Entity ID: 38
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT9LA [auth i],
PG [auth I]
252Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 39
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT10MA [auth j],
QG [auth J]
234Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 40
MoleculeChains Sequence LengthOrganismDetailsImage
39S ribosomal protein L9, mitochondrialNA [auth k],
RG [auth K]
231Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 41
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquinol-cytochrome c reductase complex ubiquinone-binding protein QP-COA [auth l],
SG [auth L]
222Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
Find proteins for I7M3P9 (Tetrahymena thermophila (strain SB210))
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Entity ID: 42
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativePA [auth m],
TG [auth M]
220Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 43
MoleculeChains Sequence LengthOrganismDetailsImage
Oxoglutarate/malate translocator protein, putativeQA [auth m1],
UG [auth M1]
346Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 44
MoleculeChains Sequence LengthOrganismDetailsImage
2-oxoglutarate/malate carrier proteinRA [auth m2],
VG [auth M2]
318Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 45
MoleculeChains Sequence LengthOrganismDetailsImage
Carrier proteinSA [auth m3],
WG [auth M3]
330Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 46
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeTA [auth n],
XG [auth N]
210Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 47
MoleculeChains Sequence LengthOrganismDetailsImage
Mobilization proteinUA [auth o],
YG [auth O]
193Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 48
MoleculeChains Sequence LengthOrganismDetailsImage
YflT domain-containing proteinVA [auth p],
ZG [auth P]
175Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 49
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeAH [auth Q],
WA [auth q]
173Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 50
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane proteinBH [auth R],
XA [auth r]
173Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 51
MoleculeChains Sequence LengthOrganismDetailsImage
Complex III subunit VIICH [auth S],
YA [auth s]
170Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 52
MoleculeChains Sequence LengthOrganismDetailsImage
Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrialDH [auth SA],
ZA [auth sa]
636Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 53
MoleculeChains Sequence LengthOrganismDetailsImage
Succinate dehydrogenase (quinone)AB [auth sb],
EH [auth SB]
312Tetrahymena thermophila SB210Mutation(s): 0 
EC: 1.3.5.1
UniProt
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Entity ID: 54
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit 8BB [auth sc],
FH [auth SC]
60Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 55
MoleculeChains Sequence LengthOrganismDetailsImage
SDHDCB [auth sd],
GH [auth SD]
44Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 56
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeDB [auth t],
HH [auth T]
158Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 57
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeEB [auth u],
IH [auth U]
154Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 58
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT22FB [auth v],
JH [auth V]
149Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 59
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome C oxidase subunit Vb proteinGB [auth vb],
KH [auth VB]
637Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 60
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeHB [auth w],
LH [auth W]
124Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 61
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeIB [auth x],
MH [auth X]
122Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 62
MoleculeChains Sequence LengthOrganismDetailsImage
LysozymeJB [auth y],
NH [auth Y]
105Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 63
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf70KB [auth y0],
OH [auth Y0]
89Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 64
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf75LB [auth y5],
PH [auth Y5]
190Tetrahymena thermophila SB210Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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