8GZU

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.18 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
Transmembrane protein, putativeA [auth 00],
BC [auth 55],
BO [auth A],
YL [auth a]
490Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein phosphatase 2C, putativeB [auth 01],
CC [auth 56],
CO [auth B],
ZL [auth b]
473Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT3BM [auth c],
C [auth 02],
DC [auth 57],
EO [auth C]
212Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
SURF1-like proteinD [auth 03],
EC [auth 58],
FM [auth d],
IO [auth D]
402Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
TraB family proteinE [auth 04],
FC [auth 59],
GM [auth e],
JO [auth E]
385Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeF [auth 05],
HC [auth 60],
HM [auth f],
KO [auth F]
348Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8, mitochondrialG [auth 06],
IC [auth 61],
JM [auth g],
MO [auth G]
318Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
SURF1-like proteinH [auth 07],
JC [auth 62],
KM [auth h],
NO [auth H]
318Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT9I [auth 08],
KC [auth 63],
LM [auth i],
OO [auth I]
252Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT10J [auth 09],
LC [auth 64],
MM [auth j],
PO [auth J]
234Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
AnnexinK [auth 0A],
QB [auth 45],
UL [auth 6t],
XN [auth 6T]
72Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Chromosome condensation regulator RCC1 repeat proteinAM [auth bp],
DO [auth BP],
L [auth 0B],
RB [auth 46]
462Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Iron-binding zinc finger CDGSH type proteinIM [auth fs],
LO [auth FS],
M [auth 0C],
SB [auth 47]
188Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
Phage proteinN [auth 0D],
QN [auth 4A],
SP [auth 4a],
TB [auth 48]
127Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf67KN [auth y7],
O [auth 0E],
OP [auth Y7],
UB [auth 49]
453Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf75JN [auth y5],
NP [auth Y5],
P [auth 0F],
WB [auth 50]
190Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf70IN [auth y0],
MP [auth Y0],
Q [auth 0G],
XB [auth 51]
89Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT28MN [auth z1],
QP [auth Z1],
R [auth 0H],
YB [auth 52]
100Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
Unknown peptideBN [auth u1],
EP [auth U1],
S [auth 0I],
ZB [auth 53]
92Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
unknown peptide17Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 21
MoleculeChains Sequence LengthOrganismDetailsImage
39S ribosomal protein L9, mitochondrialMC [auth 65],
NM [auth k],
QO [auth K],
U [auth 10]
231Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 22
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquinol-cytochrome c reductase complex ubiquinone-binding protein QP-CNC [auth 66],
OM [auth l],
RO [auth L],
V [auth 11]
222Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 23
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeOC [auth 67],
PM [auth m],
SO [auth M],
W [auth 12]
220Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 24
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativePC [auth 68],
TM [auth n],
WO [auth N],
X [auth 13]
210Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 25
MoleculeChains Sequence LengthOrganismDetailsImage
Mobilization proteinQC [auth 69],
UM [auth o],
XO [auth O],
Y [auth 14]
193Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 26
MoleculeChains Sequence LengthOrganismDetailsImage
YflT domain-containing proteinRC [auth 70],
VM [auth p],
YO [auth P],
Z [auth 15]
175Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 27
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeAA [auth 16],
SC [auth 71],
WM [auth q],
ZO [auth Q]
173Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 28
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane proteinAP [auth R],
BA [auth 17],
TC [auth 72],
XM [auth r]
173Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 29
MoleculeChains Sequence LengthOrganismDetailsImage
Complex III subunit VIIBP [auth S],
CA [auth 18],
UC [auth 73],
YM [auth s]
170Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 30
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeCP [auth T],
DA [auth 19],
VC [auth 74],
ZM [auth t]
158Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 31
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit 1DK [auth 1B],
EA [auth 1b]
59Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 32
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeAN [auth u],
DP [auth U],
FA [auth 20],
WC [auth 75]
154Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 33
MoleculeChains Sequence LengthOrganismDetailsImage
COXTT22DN [auth v],
GA [auth 21],
GP [auth V],
XC [auth 76]
149Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 34
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeFN [auth w],
HA [auth 22],
JP [auth W],
YC [auth 77]
124Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 35
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeGN [auth x],
IA [auth 23],
KP [auth X],
ZC [auth 78]
122Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 36
MoleculeChains Sequence LengthOrganismDetailsImage
LysozymeAD [auth 79],
HN [auth y],
JA [auth 24],
LP [auth Y]
105Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 37
MoleculeChains Sequence LengthOrganismDetailsImage
ABC transporterBD [auth 80],
KA [auth 25],
LN [auth z],
PP [auth Z]
90Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 38
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 1CD [auth 81],
CM [auth c1],
FO [auth C1],
LA [auth 26]
688Tetrahymena thermophila SB210Mutation(s): 0 
EC: 7.1.1.9
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Entity ID: 39
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 2DD [auth 82],
DM [auth c2],
GO [auth C2],
MA [auth 27]
604Tetrahymena thermophila SB210Mutation(s): 0 
EC: 1.9.3.1
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Entity ID: 40
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf68ED [auth 83],
EM [auth c3],
HO [auth C3],
NA [auth 28]
594Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 41
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome C oxidase subunit Vb proteinEN [auth vb],
FD [auth 84],
HP [auth VB],
OA [auth 29]
637Tetrahymena thermophila SB210Mutation(s): 0 
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UniProt GroupQ23FF5
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Entity ID: 42
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit 2EK [auth 2B],
PA [auth 2b]
178Tetrahymena thermophila SB210Mutation(s): 0 
EC: 1.6.5.3
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Entity ID: 43
MoleculeChains Sequence LengthOrganismDetailsImage
NmrA domain-containing proteinII [auth 2E],
QA [auth 2e]
322Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 44
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeJI [auth 2F],
RA [auth 2f]
296Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 45
MoleculeChains Sequence LengthOrganismDetailsImage
SDHTT3KI [auth 2G],
SA [auth 2g]
198Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 46
MoleculeChains Sequence LengthOrganismDetailsImage
Diphthamide synthesis proteinLI [auth 2H],
TA [auth 2h]
195Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 47
MoleculeChains Sequence LengthOrganismDetailsImage
DUF4885 domain-containing proteinMI [auth 2I],
UA [auth 2i]
114Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 48
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeNI [auth 2J],
VA [auth 2j]
103Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 49
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeOI [auth 2K],
WA [auth 2k]
93Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 50
MoleculeChains Sequence LengthOrganismDetailsImage
TransposasePI [auth 2L],
XA [auth 2l]
89Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 51
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeQI [auth 2M],
YA [auth 2m]
76Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 52
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeRI [auth 2N],
ZA [auth 2n]
62Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 53
MoleculeChains Sequence LengthOrganismDetailsImage
SDHTT11AB [auth 2o],
SI [auth 2O]
46Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 54
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeBB [auth 30],
GD [auth 85],
QL [auth 6a],
TN [auth 6A]
130Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 55
MoleculeChains Sequence LengthOrganismDetailsImage
Structural proteinCB [auth 31],
HD [auth 86],
RL [auth 6b],
UN [auth 6B]
230Tetrahymena thermophila SB210Mutation(s): 0 
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Entity ID: 56
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeDB [auth 32],
ID [auth 87],
SL [auth 6c],
VN [auth 6C]
103Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 57
MoleculeChains Sequence LengthOrganismDetailsImage
Decapping nucleaseEB [auth 33],
JD [auth 88],
TL [auth 6l],
WN [auth 6L]
88Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 58
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeFB [auth 34],
KD [auth 89],
VL [auth 7a],
YN [auth 7A]
133Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 59
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrialGB [auth 35],
LD [auth 90],
WL [auth 7c],
ZN [auth 7C]
236Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 60
MoleculeChains Sequence LengthOrganismDetailsImage
CTF/NF-I domain-containing proteinAO [auth 7L],
HB [auth 36],
MD [auth 91],
XL [auth 7l]
990Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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UniProt GroupQ22CI1
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Entity ID: 61
MoleculeChains Sequence LengthOrganismDetailsImage
Oxoglutarate/malate translocator protein, putativeIB [auth 37],
ND [auth 92],
QM [auth m1],
TO [auth M1]
346Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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UniProt GroupA4VDV3
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Entity ID: 62
MoleculeChains Sequence LengthOrganismDetailsImage
2-oxoglutarate/malate carrier proteinJB [auth 38],
OD [auth 93],
RM [auth m2],
UO [auth M2]
318Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 63
MoleculeChains Sequence LengthOrganismDetailsImage
Carrier proteinKB [auth 39],
PD [auth 94],
SM [auth m3],
VO [auth M3]
330Tetrahymena thermophila SB210Mutation(s): 0 
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UniProt GroupQ22ZA6
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Entity ID: 64
MoleculeChains Sequence LengthOrganismDetailsImage
Tim10/DDP family zinc finger proteinLB [auth 40],
NN [auth 1T],
OL [auth 1t],
QD [auth 95]
72Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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UniProt GroupW7X3D6
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Entity ID: 65
MoleculeChains Sequence LengthOrganismDetailsImage
Zf-Tim10_DDP domain-containing proteinIP [auth 2t],
MB [auth 41],
ON [auth 2T],
RD [auth 96]
72Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 66
MoleculeChains Sequence LengthOrganismDetailsImage
Zf-Tim10_DDP domain-containing proteinNB [auth 42],
PN [auth 3T],
RP [auth 3t],
SD [auth 97]
93Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 67
MoleculeChains Sequence LengthOrganismDetailsImage
TransposaseOB [auth 43],
RN [auth 4T],
TD [auth 98],
TP [auth 4t]
68Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 68
MoleculeChains Sequence LengthOrganismDetailsImage
Cullin domain-containing proteinPB [auth 44],
PL [auth 5t],
SN [auth 5T],
UD [auth 99]
81Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 69
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf58FK [auth 4L],
VB [auth 4l]
116Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 70
MoleculeChains Sequence LengthOrganismDetailsImage
Ymf57GC [auth 5b],
GK [auth 5B]
100Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 71
MoleculeChains Sequence LengthOrganismDetailsImage
Transmembrane protein, putativeHK [auth A1],
VD [auth a1]
94Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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Entity ID: 72
MoleculeChains Sequence LengthOrganismDetailsImage
Ribosomal protein L51/S25/CI-B8 domain proteinIK [auth A2],
WD [auth a2]
103Tetrahymena thermophila SB210Mutation(s): 0 
UniProt
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UniProt GroupI7MA77
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