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- EMDB-11874: Cryo-EM structure of Arabidopsis thaliana Complex-I (membrane tip) -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-11874 | |||||||||
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Title | Cryo-EM structure of Arabidopsis thaliana Complex-I (membrane tip) | |||||||||
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Function / homology | ![]() photorespiration / plant-type vacuole / respiratory chain complex I / plastid / NADH:ubiquinone reductase (H+-translocating) / : / mitochondrial electron transport, NADH to ubiquinone / ubiquinone binding / NADH dehydrogenase (ubiquinone) activity / acyl carrier activity ...photorespiration / plant-type vacuole / respiratory chain complex I / plastid / NADH:ubiquinone reductase (H+-translocating) / : / mitochondrial electron transport, NADH to ubiquinone / ubiquinone binding / NADH dehydrogenase (ubiquinone) activity / acyl carrier activity / electron transport coupled proton transport / ATP synthesis coupled electron transport / mitochondrial membrane / electron transport chain / mitochondrial intermembrane space / transmembrane transport / fatty acid biosynthetic process / mitochondrial inner membrane / carbohydrate metabolic process / mitochondrial matrix / mitochondrion / plasma membrane / cytosol Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.17 Å | |||||||||
![]() | Klusch N / Kuehlbrandt W / Yildiz O | |||||||||
Funding support | ![]()
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![]() | ![]() Title: A ferredoxin bridge connects the two arms of plant mitochondrial complex I. Authors: Niklas Klusch / Jennifer Senkler / Özkan Yildiz / Werner Kühlbrandt / Hans-Peter Braun / ![]() Abstract: Mitochondrial complex I is the main site for electron transfer to the respiratory chain and generates much of the proton gradient across the inner mitochondrial membrane. Complex I is composed of two ...Mitochondrial complex I is the main site for electron transfer to the respiratory chain and generates much of the proton gradient across the inner mitochondrial membrane. Complex I is composed of two arms, which form a conserved L-shape. We report the structures of the intact, 47-subunit mitochondrial complex I from Arabidopsis thaliana and the 51-subunit complex I from the green alga Polytomella sp., both at around 2.9 Å resolution. In both complexes, a heterotrimeric γ-carbonic anhydrase domain is attached to the membrane arm on the matrix side. Two states are resolved in A. thaliana complex I, with different angles between the two arms and different conformations of the ND1 (NADH dehydrogenase subunit 1) loop near the quinol binding site. The angle appears to depend on a bridge domain, which links the peripheral arm to the membrane arm and includes an unusual ferredoxin. We propose that the bridge domain participates in regulating the activity of plant complex I. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 33.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 25.3 KB 25.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 21.2 KB | Display | ![]() |
Images | ![]() | 96.2 KB | ||
Others | ![]() ![]() | 533.1 MB 533.2 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7aqwMC ![]() 7aqqC ![]() 7aqrC ![]() 7ar7C ![]() 7ar8C ![]() 7ar9C ![]() 7arbC ![]() 7arcC ![]() 7ardC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 0.837 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Half map: #2
File | emd_11874_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_11874_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
+Entire : Arabidopsis complex I - membrane tip
+Supramolecule #1: Arabidopsis complex I - membrane tip
+Macromolecule #1: NADH-ubiquinone oxidoreductase chain 5
+Macromolecule #2: NADH-ubiquinone oxidoreductase chain 4
+Macromolecule #3: Acyl carrier protein 1, mitochondrial
+Macromolecule #4: Transmembrane protein
+Macromolecule #5: ESSS subunit of NADH:ubiquinone oxidoreductase (Complex I) protein
+Macromolecule #6: P1
+Macromolecule #7: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2
+Macromolecule #8: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 3-A
+Macromolecule #9: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mito...
+Macromolecule #10: B15 -- 1 beta subcomplex subunit 4
+Macromolecule #11: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 9
+Macromolecule #12: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 7
+Macromolecule #13: NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 10-B
+Macromolecule #14: PHOSPHATIDYLETHANOLAMINE
+Macromolecule #15: (7S)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5...
+Macromolecule #16: S-[2-({N-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-b...
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.8 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 43.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |