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Open data
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Basic information
Entry | Database: PDB / ID: 9grx | ||||||
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Title | NDH-PSI-LHCI supercomplex from S. oleracea | ||||||
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![]() | ELECTRON TRANSPORT / NDH / PSI / Supercomplex / photosynthesis / electron transport chain / lipids / proton translocation / plastoquinone | ||||||
Function / homology | ![]() NAD(P)H dehydrogenase complex (plastoquinone) / glucose-6-phosphate 1-epimerase activity / P450-containing electron transport chain / thylakoid / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / NADH dehydrogenase complex / photosystem II oxygen evolving complex / chloroplast thylakoid lumen / photosynthesis, light harvesting / photosystem I reaction center ...NAD(P)H dehydrogenase complex (plastoquinone) / glucose-6-phosphate 1-epimerase activity / P450-containing electron transport chain / thylakoid / Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions / NADH dehydrogenase complex / photosystem II oxygen evolving complex / chloroplast thylakoid lumen / photosynthesis, light harvesting / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosynthetic electron transport chain / photosystem I / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / photosystem II / extrinsic component of membrane / chlorophyll binding / cyclosporin A binding / photosynthesis, light reaction / chloroplast thylakoid membrane / : / ubiquinone binding / electron transport coupled proton transport / NADH dehydrogenase activity / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / quinone binding / ATP synthesis coupled electron transport / photosynthesis / chloroplast / aerobic respiration / peptidyl-prolyl cis-trans isomerase activity / phosphoprotein binding / peptidylprolyl isomerase / 2 iron, 2 sulfur cluster binding / NAD binding / protein folding / 4 iron, 4 sulfur cluster binding / carbohydrate binding / molecular adaptor activity / response to oxidative stress / carbohydrate metabolic process / electron transfer activity / oxidoreductase activity / iron ion binding / calcium ion binding / magnesium ion binding / membrane / metal ion binding / plasma membrane / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.19 Å | ||||||
![]() | Introini, B. / Hahn, A. / Kuehlbrandt, W. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM structure of the NDH-PSI-LHCI supercomplex from Spinacia oleracea. Authors: Bianca Introini / Alexander Hahn / Werner Kühlbrandt / ![]() Abstract: The nicotinamide adenine dinucleotide phosphate (NADPH) dehydrogenase (NDH) complex is crucial for photosynthetic cyclic electron flow and respiration, transferring electrons from ferredoxin to ...The nicotinamide adenine dinucleotide phosphate (NADPH) dehydrogenase (NDH) complex is crucial for photosynthetic cyclic electron flow and respiration, transferring electrons from ferredoxin to plastoquinone while transporting H across the chloroplast membrane. This process boosts adenosine triphosphate production, regardless of NADPH levels. In flowering plants, NDH forms a supercomplex with photosystem I, enhancing its stability under high light. We report the cryo-electron microscopy structure of the NDH supercomplex in Spinacia oleracea at a resolution of 3.0-3.3 Å. The supercomplex consists of 41 protein subunits, 154 chlorophylls and 38 carotenoids. Subunit interactions are reinforced by 46 distinct lipids. The structure of NDH resembles that of mitochondrial complex I closely, including the quinol-binding site and an extensive internal aqueous passage for proton translocation. A well-resolved catalytic plastoquinone (PQ) occupies the PQ channel. The pronounced structural similarity to complex I sheds light on electron transfer and proton translocation within the NDH supercomplex. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 15 MB | Display | ![]() |
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Full document | ![]() | 15.6 MB | Display | |
Data in XML | ![]() | 307.6 KB | Display | |
Data in CIF | ![]() | 424.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 51527MC C: citing same article ( M: map data used to model this data |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-Photosynthetic NDH subunit of lumenal location ... , 3 types, 3 molecules 067
#1: Protein | Mass: 18606.793 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#7: Protein | Mass: 14875.953 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#8: Protein | Mass: 16451.979 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Photosynthetic NDH subunit of subcomplex B ... , 5 types, 5 molecules 12345
#2: Protein | Mass: 44622.605 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#3: Protein | Mass: 40259.473 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#4: Protein | Mass: 15614.840 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#5: Protein | Mass: 10763.025 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#6: Protein | Mass: 17772.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Protein , 5 types, 5 molecules 89Dck
#9: Protein | Mass: 15352.496 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#10: Protein | Mass: 18900.408 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#14: Protein | Mass: 55980.191 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3J0, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#29: Protein | Mass: 9035.483 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#37: Protein | Mass: 13229.404 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-NAD(P)H-quinone oxidoreductase subunit ... , 15 types, 15 molecules ABCEFGHIJKLMNOU
#11: Protein | Mass: 38985.613 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3I6, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
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#12: Protein | Mass: 54026.148 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: P0CD52, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#13: Protein | Mass: 13270.651 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3L9, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#15: Protein | Mass: 11085.047 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3I9, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#16: Protein | Mass: 84590.094 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3J4, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#17: Protein | Mass: 19193.654 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3I8, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#18: Protein | Mass: 45172.309 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3I5, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#19: Protein | Mass: 19004.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3I7, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#20: Protein | Mass: 18687.322 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3M1, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#21: Protein | Mass: 22789.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() References: UniProt: Q9M3M0, Translocases; Catalysing the translocation of protons; Linked to oxidoreductase reactions |
#22: Protein | Mass: 13194.599 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#23: Protein | Mass: 16702.113 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#24: Protein | Mass: 18727.768 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#25: Protein | Mass: 11127.798 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#26: Protein | Mass: 27127.314 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Photosystem I P700 chlorophyll a apoprotein ... , 2 types, 2 molecules ab
#27: Protein | Mass: 82144.953 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#28: Protein | Mass: 82377.547 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Photosystem I reaction center subunit ... , 8 types, 8 molecules defghijl
#30: Protein | Mass: 16053.480 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#31: Protein | Mass: 7736.863 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#32: Protein | Mass: 17151.859 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#33: Protein | Mass: 10719.099 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#34: Protein | Mass: 10391.756 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#35: Protein/peptide | Mass: 3458.225 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#36: Protein/peptide | Mass: 4845.679 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#38: Protein | Mass: 16988.656 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Chlorophyll a-b binding protein, ... , 4 types, 4 molecules wxyz
#39: Protein | Mass: 23947.340 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#40: Protein | Mass: 22135.113 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#41: Protein | Mass: 24168.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#42: Protein | Mass: 21184.209 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Sugars , 1 types, 3 molecules 
#51: Sugar |
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-Non-polymers , 12 types, 245 molecules 




















#43: Chemical | ChemComp-BCR / #44: Chemical | ChemComp-PGT / ( #45: Chemical | Mass: 548.663 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H48O11 / Feature type: SUBJECT OF INVESTIGATION #46: Chemical | ChemComp-LMG / #47: Chemical | ChemComp-PQ9 / | #48: Chemical | ChemComp-SQD / #49: Chemical | ChemComp-SF4 / #50: Chemical | ChemComp-CLA / #52: Chemical | ChemComp-CL0 / | #53: Chemical | #54: Chemical | ChemComp-CHL / #55: Chemical | ChemComp-LUT / ( |
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-Details
Has ligand of interest | Y |
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Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: NDH-PSI-LHCI supercomplex from Spinacia oleracea / Type: COMPLEX / Entity ID: #1-#42 / Source: NATURAL |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS Details: Titan Krios G3i microscope at 300 kV, equipped with a K3 (Gatan) detector operating in electron counting mode, Bioquantum energy filter (Gatan) |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1700 nm / Nominal defocus min: 700 nm |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
EM software | Name: PHENIX / Category: model refinement | ||||||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.19 Å / Resolution method: OTHER / Num. of particles: 38385 / Details: This is a composite map / Symmetry type: POINT | ||||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL | ||||||||||||||||||||||||||||
Atomic model building |
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