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- PDB-6ijj: Photosystem I of Chlamydomonas reinhardtii -

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Basic information

Entry
Database: PDB / ID: 6ijj
TitlePhotosystem I of Chlamydomonas reinhardtii
Components
  • Lhca1
  • Lhca3
  • Lhca4
  • Lhca5
  • Lhca6
  • Lhca7
  • Lhca8
  • PsaA
  • PsaB
  • PsaC
  • PsaD
  • PsaE
  • PsaF
  • PsaI
  • PsaJ
  • PsaK
  • PsaL
KeywordsMEMBRANE PROTEIN / Photosystem / Antenna / green alga
Function / homology
Function and homology information


photosynthesis, light harvesting in photosystem I / chloroplast thylakoid lumen / photosynthesis, light harvesting / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / photosystem II / chlorophyll binding / chloroplast thylakoid membrane ...photosynthesis, light harvesting in photosystem I / chloroplast thylakoid lumen / photosynthesis, light harvesting / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / photosystem II / chlorophyll binding / chloroplast thylakoid membrane / response to light stimulus / photosynthesis / 4 iron, 4 sulfur cluster binding / electron transfer activity / membrane => GO:0016020 / magnesium ion binding / metal ion binding
Similarity search - Function
Chlorophyll a-b binding protein / Chlorophyll a/b binding protein domain / Photosystem I, reaction centre, subunit PsaF / Photosystem I p700 chlorophyll A apoprotein A1 / Photosystem I PsaA/PsaB / Photosystem 1 Reaction Centre Subunit Ii; Chain: D; / Photosystem I PsaD, reaction center subunit II / Single helix bin / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant ...Chlorophyll a-b binding protein / Chlorophyll a/b binding protein domain / Photosystem I, reaction centre, subunit PsaF / Photosystem I p700 chlorophyll A apoprotein A1 / Photosystem I PsaA/PsaB / Photosystem 1 Reaction Centre Subunit Ii; Chain: D; / Photosystem I PsaD, reaction center subunit II / Single helix bin / Photosystem I reaction center subunit psaK, plant / Photosystem I reaction center subunit V/PsaK, plant / Photosystem I PsaG/PsaK domain, chloroplastic / SH3 type barrels. - #50 / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I reaction centre subunit XI / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII superfamily / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / Photosystem I reaction centre subunit III / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I PsaD / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I, reaction centre subunit PsaD superfamily / Photosystem I reaction centre subunit IX / PsaJ / PsaD / Chlorophyll A-B binding protein, plant and chromista / Photosystem I PsaE, reaction centre subunit IV / Photosystem I reaction centre subunit IV / PsaE / Chlorophyll A-B binding protein / Chlorophyll A-B binding protein / Alpha-Beta Plaits - #20 / Photosystem I protein PsaC / Photosystem I PsaA / Photosystem I PsaB / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Photosystem I psaA/psaB protein / Electron transport accessory-like domain superfamily / 4Fe-4S dicluster domain / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / Helicase, Ruva Protein; domain 3 / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain / Single alpha-helices involved in coiled-coils or other helix-helix interfaces / SH3 type barrels. / Roll / Alpha-Beta Plaits / Up-down Bundle / 2-Layer Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
BETA-CAROTENE / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / Chem-LUT / Chem-NEX / PHYLLOQUINONE / IRON/SULFUR CLUSTER / Chem-XAT ...BETA-CAROTENE / CHLOROPHYLL A / DIGALACTOSYL DIACYL GLYCEROL (DGDG) / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / Chem-LUT / Chem-NEX / PHYLLOQUINONE / IRON/SULFUR CLUSTER / Chem-XAT / Chlorophyll a-b binding protein, chloroplastic / Photosystem I reaction center subunit VIII / PSI subunit V / Chlorophyll a-b binding protein, chloroplastic / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I reaction center subunit IV, chloroplastic / Photosystem I reaction center subunit III, chloroplastic / Photosystem I reaction center subunit psaK, chloroplastic / Photosystem I reaction center subunit IX / Photosystem I iron-sulfur center / Chlorophyll a-b binding protein, chloroplastic / Photosystem I reaction center subunit II, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic / Chlorophyll a-b binding protein, chloroplastic
Similarity search - Component
Biological speciesChlamydomonas reinhardtii (plant)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.89 Å
AuthorsPan, X. / Ma, J. / Su, X. / Liu, Z. / Zhang, X. / Li, M.
Funding support China, 10items
OrganizationGrant numberCountry
Ministry of Science and Technology (China)2017YFA0503702 China
Ministry of Science and Technology (China)2017YFA0504700 China
Ministry of Science and Technology (China)2016YFA0502900 China
Chinese Academy of SciencesXDB08020302 China
Chinese Academy of SciencesXDB08030204 China
Chinese Academy of SciencesXDB27020106 China
Chinese Academy of SciencesQYZDB-SSW-SMC005 China
National Natural Science Foundation of China31770778 China
National Natural Science Foundation of China31700649 China
National Natural Science Foundation of China31600609 China
CitationJournal: Nat Plants / Year: 2019
Title: Antenna arrangement and energy transfer pathways of a green algal photosystem-I-LHCI supercomplex.
Authors: Xiaodong Su / Jun Ma / Xiaowei Pan / Xuelin Zhao / Wenrui Chang / Zhenfeng Liu / Xinzheng Zhang / Mei Li /
Abstract: During oxygenic photosynthesis, photosystems I and II (PSI and PSII) are essential for light-driven electron transport. Excitation energy transfer in PSI occurs extremely quickly, making it an ...During oxygenic photosynthesis, photosystems I and II (PSI and PSII) are essential for light-driven electron transport. Excitation energy transfer in PSI occurs extremely quickly, making it an efficient energy converter. In the alga Chlamydomonas reinhardtii (Cr), multiple units of light-harvesting complex I (LHCI) bind to the PSI core and function as peripheral antennae, forming a PSI-LHCI supercomplex. CrPSI-LHCI shows significantly larger antennae compared with plant PSI-LHCI while maintaining highly efficient energy transfer from LHCI to PSI. Here, we report structures of CrPSI-LHCI, solved by cryo-electron microscopy, revealing that up to ten LHCIs are associated with the PSI core. The structures provide detailed information about antenna organization and pigment arrangement within the supercomplexes. Highly populated and closely associated chlorophylls in the antennae explain the high efficiency of light harvesting and excitation energy transfer in CrPSI-LHCI.
History
DepositionOct 10, 2018Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Mar 20, 2019Provider: repository / Type: Initial release
Revision 1.1Mar 27, 2019Group: Data collection / Database references / Structure summary
Category: citation / citation_author / struct
Item: _citation.journal_abbrev / _citation.journal_id_ISSN ..._citation.journal_abbrev / _citation.journal_id_ISSN / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _struct.title
Revision 2.0May 1, 2019Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations
Category: atom_site / pdbx_nonpoly_scheme ...atom_site / pdbx_nonpoly_scheme / pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_chiral / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _pdbx_nonpoly_scheme.auth_mon_id / _pdbx_nonpoly_scheme.auth_seq_num / _pdbx_nonpoly_scheme.entity_id / _pdbx_nonpoly_scheme.mon_id / _pdbx_nonpoly_scheme.pdb_mon_id / _pdbx_nonpoly_scheme.pdb_seq_num / _pdbx_nonpoly_scheme.pdb_strand_id / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_unobs_or_zero_occ_atoms.auth_asym_id / _pdbx_unobs_or_zero_occ_atoms.auth_atom_id / _pdbx_unobs_or_zero_occ_atoms.auth_comp_id / _pdbx_unobs_or_zero_occ_atoms.auth_seq_id / _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _pdbx_unobs_or_zero_occ_atoms.label_atom_id / _pdbx_unobs_or_zero_occ_atoms.label_comp_id / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_atom_id / _pdbx_validate_chiral.auth_seq_id / _pdbx_validate_chiral.details / _struct_asym.entity_id / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_site.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id / _struct_site.pdbx_num_residues / _struct_site_gen.auth_asym_id / _struct_site_gen.auth_comp_id / _struct_site_gen.auth_seq_id / _struct_site_gen.label_asym_id / _struct_site_gen.label_comp_id / _struct_site_gen.label_seq_id / _struct_site_gen.pdbx_num_res / _struct_site_gen.site_id

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Structure visualization

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  • Deposited structure unit
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  • EMDB-9678
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Assembly

Deposited unit
A: PsaA
B: PsaB
C: PsaC
D: PsaD
E: PsaE
F: PsaF
I: PsaI
J: PsaJ
K: PsaK
L: PsaL
1: Lhca1
a: Lhca1
3: Lhca3
4: Lhca4
5: Lhca5
6: Lhca6
7: Lhca7
8: Lhca8
hetero molecules


Theoretical massNumber of molelcules
Total (without water)774,714317
Polymers531,99318
Non-polymers242,720299
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: scanning transmission electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 16 types, 17 molecules ABCDEFIKL1a345678

#1: Protein PsaA


Mass: 83239.203 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P12154*PLUS
#2: Protein PsaB


Mass: 82184.266 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P09144*PLUS
#3: Protein PsaC


Mass: 8869.325 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q00914*PLUS
#4: Protein PsaD


Mass: 21372.887 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39615*PLUS
#5: Protein PsaE


Mass: 16221.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P12352*PLUS
#6: Protein PsaF


Mass: 24088.936 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P12356*PLUS
#7: Protein PsaI


Mass: 10586.388 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8IFG7*PLUS
#9: Protein PsaK


Mass: 16412.221 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P14225*PLUS
#10: Protein PsaL


Mass: 27203.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8IL32*PLUS
#11: Protein Lhca1


Mass: 26135.863 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q05093*PLUS
#12: Protein Lhca3


Mass: 32629.486 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8JF10*PLUS
#13: Protein Lhca4


Mass: 31462.010 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8I000*PLUS
#14: Protein Lhca5


Mass: 30151.650 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q75VY8*PLUS
#15: Protein Lhca6


Mass: 35122.043 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q75VY6*PLUS
#16: Protein Lhca7


Mass: 26248.869 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q84Y02*PLUS
#17: Protein Lhca8


Mass: 29178.635 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q75VY7*PLUS

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Protein/peptide , 1 types, 1 molecules J

#8: Protein/peptide PsaJ


Mass: 4750.509 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P59777*PLUS

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Sugars , 2 types, 9 molecules

#23: Sugar
ChemComp-LMU / DODECYL-ALPHA-D-MALTOSIDE


Type: D-saccharide / Mass: 510.615 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C24H46O11 / Comment: detergent*YM
#25: Sugar ChemComp-DGD / DIGALACTOSYL DIACYL GLYCEROL (DGDG)


Type: saccharideCarbohydrate / Mass: 949.299 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C51H96O15

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Non-polymers , 9 types, 290 molecules

#18: Chemical...
ChemComp-CLA / CHLOROPHYLL A / Chlorophyll a


Mass: 893.489 Da / Num. of mol.: 216 / Source method: obtained synthetically / Formula: C55H72MgN4O5
#19: Chemical ChemComp-PQN / PHYLLOQUINONE / VITAMIN K1 / 2-METHYL-3-PHYTYL-1,4-NAPHTHOQUINONE / Phytomenadione


Mass: 450.696 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C31H46O2
#20: Chemical
ChemComp-LHG / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / Phosphatidylglycerol


Mass: 722.970 Da / Num. of mol.: 14 / Source method: obtained synthetically / Formula: C38H75O10P / Comment: phospholipid*YM
#21: Chemical...
ChemComp-BCR / BETA-CAROTENE / Β-Carotene


Mass: 536.873 Da / Num. of mol.: 30 / Source method: obtained synthetically / Formula: C40H56
#22: Chemical ChemComp-SF4 / IRON/SULFUR CLUSTER / Iron–sulfur cluster


Mass: 351.640 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Fe4S4
#24: Chemical
ChemComp-LMG / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE


Mass: 787.158 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C45H86O10
#26: Chemical
ChemComp-LUT / (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL / (3R,3'R)-BETA,BETA-CAROTENE-3,3'-DIOL, LUTEIN / Lutein


Mass: 568.871 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C40H56O2
#27: Chemical
ChemComp-XAT / (3S,5R,6S,3'S,5'R,6'S)-5,6,5',6'-DIEPOXY-5,6,5',6'- TETRAHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL / VIOLAXANTHIN / Violaxanthin


Mass: 600.870 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C40H56O4
#28: Chemical ChemComp-NEX / (1R,3R)-6-{(3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4R,6R)-4-HYDROXY-2,2,6-TRIMETHYL-7-OXABICYCLO[4.1.0]HEPT-1-YL]-3,7,12,16-TETRAMETHYLOCTADECA-1,3,5,7,9,11,13,15,17-NONAENYLIDENE}-1,5,5-TRIMETHYLCYCLOHEXANE-1,3-DIOL / (3S,5R,6R,3'S,5'R,6'S)-5',6'-EPOXY-6,7-DIDEHYDRO- 5,6,5',6'-TETRAHYDRO-BETA,BETA-CAROTENE-3,5,3'-TRIOL, 9'-CIS-NEOXANTHIN


Mass: 600.870 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C40H56O4

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Chlamydomonas reinhardtii PSI with eight light harvesting antennae
Type: COMPLEX / Entity ID: #1-#17 / Source: NATURAL
Source (natural)Organism: Chlamydomonas reinhardtii (plant)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 60 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.12_2829: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.89 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 58955 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00947904
ELECTRON MICROSCOPYf_angle_d1.19468232
ELECTRON MICROSCOPYf_dihedral_angle_d14.58521286
ELECTRON MICROSCOPYf_chiral_restr0.0875691
ELECTRON MICROSCOPYf_plane_restr0.0099095

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