+
Open data
-
Basic information
Entry | ![]() | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Title | III2IV respiratory supercomplex from Saccharomyces cerevisiae | ||||||||||||
![]() | |||||||||||||
![]() |
| ||||||||||||
![]() | Respiration / supercomplex / MEMBRANE PROTEIN | ||||||||||||
Function / homology | ![]() 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 respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV ...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 respirasome assembly / Mitochondrial protein degradation / mitochondrial respiratory chain complex III assembly / respiratory chain complex IV / cellular respiration / respiratory chain complex / cytochrome-c oxidase / respiratory chain complex III / quinol-cytochrome-c reductase / mitochondrial electron transport, cytochrome c to oxygen / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial crista / ubiquinone binding / ATP synthesis coupled electron transport / enzyme regulator activity / proton transmembrane transport / nuclear periphery / aerobic respiration / respiratory electron transport chain / mitochondrial membrane / 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 / metal ion binding / membrane / cytosol Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.4 Å | ||||||||||||
![]() | Wu F / Di Trani JM / Rubinstein JL / Brzezinski P / Moe A | ||||||||||||
Funding support | ![]() ![]()
| ||||||||||||
![]() | ![]() Title: Electron transfer in the respiratory chain at low salinity. Authors: Ana Paula Lobez / Fei Wu / Justin M Di Trani / John L Rubinstein / Mikael Oliveberg / Peter Brzezinski / Agnes Moe / ![]() ![]() ![]() Abstract: Recent studies have established that cellular electrostatic interactions are more influential than assumed previously. Here, we use cryo-EM and perform steady-state kinetic studies to investigate ...Recent studies have established that cellular electrostatic interactions are more influential than assumed previously. Here, we use cryo-EM and perform steady-state kinetic studies to investigate electrostatic interactions between cytochrome (cyt.) c and the complex (C) III-IV supercomplex from Saccharomyces cerevisiae at low salinity. The kinetic studies show a sharp transition with a Hill coefficient ≥2, which together with the cryo-EM data at 2.4 Å resolution indicate multiple cyt. c molecules bound along the supercomplex surface. Negatively charged loops of CIII subunits Qcr6 and Qcr9 become structured to interact with cyt. c. In addition, the higher resolution allows us to identify water molecules in proton pathways of CIV and, to the best of our knowledge, previously unresolved cardiolipin molecules. In conclusion, the lowered electrostatic screening renders engagement of multiple cyt. c molecules that are directed by electrostatically structured CIII loops to conduct electron transfer between CIII and CIV. | ||||||||||||
History |
|
-
Structure visualization
Supplemental images |
---|
-
Downloads & links
-EMDB archive
Map data | ![]() | 773 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 37.9 KB 37.9 KB | Display Display | ![]() |
Images | ![]() | 83.9 KB | ||
Filedesc metadata | ![]() | 9.8 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9etzMC C: citing same article ( M: atomic model generated by this map |
---|---|
Similar structure data | Similarity search - Function & homology ![]() |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.8464 Å | ||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
|
-Supplemental data
-
Sample components
+Entire : III2-IV respiratory supercomplex
+Supramolecule #1: III2-IV respiratory supercomplex
+Macromolecule #1: Cytochrome b-c1 complex subunit 1, mitochondrial
+Macromolecule #2: Cytochrome b-c1 complex subunit 2, mitochondrial
+Macromolecule #3: Cytochrome b
+Macromolecule #4: Cytochrome c1, heme protein, mitochondrial
+Macromolecule #5: Cytochrome b-c1 complex subunit Rieske, mitochondrial
+Macromolecule #6: Cytochrome b-c1 complex subunit 6, mitochondrial
+Macromolecule #7: Cytochrome b-c1 complex subunit 7, mitochondrial
+Macromolecule #8: Cytochrome b-c1 complex subunit 8, mitochondrial
+Macromolecule #9: Cytochrome b-c1 complex subunit 9, mitochondrial
+Macromolecule #10: Cytochrome b-c1 complex subunit 10, mitochondrial
+Macromolecule #11: Cytochrome c oxidase subunit 1
+Macromolecule #12: Cytochrome c oxidase subunit 2
+Macromolecule #13: Cytochrome c oxidase subunit 3
+Macromolecule #14: Cytochrome c oxidase subunit 4, mitochondrial
+Macromolecule #15: Cytochrome c oxidase subunit 6, mitochondrial
+Macromolecule #16: Cytochrome c oxidase subunit 7, mitochondrial
+Macromolecule #17: Cytochrome c oxidase subunit 8, mitochondrial
+Macromolecule #18: Cytochrome c oxidase subunit 9, mitochondrial
+Macromolecule #19: Cytochrome c oxidase subunit 12, mitochondrial
+Macromolecule #20: Cytochrome c oxidase subunit 13, mitochondrial
+Macromolecule #21: Cytochrome c oxidase subunit 26, mitochondrial
+Macromolecule #22: Cytochrome c oxidase subunit 5A, mitochondrial
+Macromolecule #23: CARDIOLIPIN
+Macromolecule #24: PROTOPORPHYRIN IX CONTAINING FE
+Macromolecule #25: DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE
+Macromolecule #26: 1,2-DIACYL-SN-GLYCERO-3-PHOSHOCHOLINE
+Macromolecule #27: 5-(3,7,11,15,19,23-HEXAMETHYL-TETRACOSA-2,6,10,14,18,22-HEXAENYL)...
+Macromolecule #28: HEME C
+Macromolecule #29: FE2/S2 (INORGANIC) CLUSTER
+Macromolecule #30: COPPER (II) ION
+Macromolecule #31: HEME-A
+Macromolecule #32: CALCIUM ION
+Macromolecule #33: MAGNESIUM ION
+Macromolecule #34: DINUCLEAR COPPER ION
+Macromolecule #35: ZINC ION
+Macromolecule #36: water
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.4 |
---|---|
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 105000 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
-
Image processing
Startup model | Type of model: PDB ENTRY PDB model - PDB ID: |
---|---|
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 196457 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |