7WFE image
Entry Detail
PDB ID:
7WFE
EMDB ID:
Title:
Right PSI in the cyclic electron transfer supercomplex NDH-PSI from Arabidopsis
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2021-12-26
Release Date:
2022-03-16
Method Details:
Experimental Method:
Resolution:
3.25 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Chlorophyll a-b binding protein 6, chloroplastic
Chain IDs:M (auth: B1)
Chain Length:241
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I chlorophyll a/b-binding protein 2, chloroplastic
Chain IDs:N (auth: B2)
Chain Length:257
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I chlorophyll a/b-binding protein 3-1, chloroplastic
Chain IDs:O (auth: B3)
Chain Length:273
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I chlorophyll a/b-binding protein 5, chloroplastic
Chain IDs:P (auth: B5)
Chain Length:256
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I P700 chlorophyll a apoprotein A1
Chain IDs:A (auth: BA)
Chain Length:750
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I P700 chlorophyll a apoprotein A2
Chain IDs:B (auth: BB)
Chain Length:734
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I iron-sulfur center
Chain IDs:C (auth: BC)
Chain Length:81
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit II-2, chloroplastic
Chain IDs:D (auth: BD)
Chain Length:204
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit IV A, chloroplastic
Chain IDs:E (auth: BE)
Chain Length:143
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit III, chloroplastic
Chain IDs:F (auth: BF)
Chain Length:221
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit V, chloroplastic
Chain IDs:G (auth: BG)
Chain Length:160
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit VI-2, chloroplastic
Chain IDs:H (auth: BH)
Chain Length:145
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit VIII
Chain IDs:I (auth: BI)
Chain Length:37
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit IX
Chain IDs:J (auth: BJ)
Chain Length:44
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit psaK, chloroplastic
Chain IDs:K (auth: BK)
Chain Length:130
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Polymer Type:polypeptide(L)
Description:Photosystem I reaction center subunit XI, chloroplastic
Chain IDs:L (auth: BL)
Chain Length:219
Number of Molecules:1
Biological Source:Arabidopsis thaliana
Primary Citation
Supramolecular assembly of chloroplast NADH dehydrogenase-like complex with photosystem I from Arabidopsis thaliana.
Mol Plant 15 454 467 (2022)
PMID: 35123031 DOI: 10.1016/j.molp.2022.01.020

Abstact

Cyclic electron transport/flow (CET/CEF) in chloroplasts is a regulatory process essential for the optimization of plant photosynthetic efficiency. A crucial CEF pathway is catalyzed by a membrane-embedded NADH dehydrogenase-like (NDH) complex that contains at least 29 protein subunits and associates with photosystem I (PSI) to form the NDH-PSI supercomplex. Here, we report the 3.9 Å resolution structure of the Arabidopsis thaliana NDH-PSI (AtNDH-PSI) supercomplex. We constructed structural models for 26 AtNDH subunits, among which 11 are unique to chloroplasts and stabilize the core part of the NDH complex. In the supercomplex, one NDH can bind up to two PSI-light-harvesting complex I (PSI-LHCI) complexes at both sides of its membrane arm. Two minor LHCIs, Lhca5 and Lhca6, each present in one PSI-LHCI, interact with NDH and contribute to supercomplex formation and stabilization. Collectively, our study reveals the structural details of the AtNDH-PSI supercomplex assembly and provides a molecular basis for further investigation of the regulatory mechanism of CEF in plants.

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