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- PDB-6tra: Cryo- EM structure of the Thermosynechococcus elongatus photosyst... -

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Basic information

Entry
Database: PDB / ID: 6tra
TitleCryo- EM structure of the Thermosynechococcus elongatus photosystem I in the presence of cytochrome c6
Components(Photosystem I ...) x 12
KeywordsPHOTOSYNTHESIS / Photosystem I / P700 / Cyanobacteria
Function / homology
Function and homology information


photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis / 4 iron, 4 sulfur cluster binding / : / electron transfer activity ...photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis / 4 iron, 4 sulfur cluster binding / : / electron transfer activity / magnesium ion binding / integral component of membrane / metal ion binding
Similarity search - Function
Photosystem I PsaX / PsaX family / Photosystem I PsaX superfamily / Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction centre subunit PsaK superfamily ...Photosystem I PsaX / PsaX family / Photosystem I PsaX superfamily / Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG / psaK / Photosystem I reaction center subunit V/PsaK / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I reaction centre subunit VIII superfamily / Photosystem I reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / PsaD / Photosystem I reaction centre subunit IX / PsaJ / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I PsaD / Photosystem I, reaction centre subunit PsaD superfamily / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I reaction centre subunit IV / PsaE / Photosystem I PsaE, reaction centre subunit IV / Photosystem I protein PsaC / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / Photosystem I PsaB / Photosystem I PsaA / Photosystem I psaA/psaB protein / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Electron transport accessory-like domain superfamily / 4Fe-4S dicluster domain / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain
Similarity search - Domain/homology
Photosystem I reaction center subunit VIII / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit PsaK / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II / Photosystem I reaction center subunit XI / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / BETA-CAROTENE / Photosystem I P700 chlorophyll a apoprotein A1 ...Photosystem I reaction center subunit VIII / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit PsaK / Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II / Photosystem I reaction center subunit XI / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I iron-sulfur center / BETA-CAROTENE / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I reaction center subunit XII / Photosystem I reaction center subunit III / CHLOROPHYLL A ISOMER / IRON/SULFUR CLUSTER / PHYLLOQUINONE / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / CHLOROPHYLL A / Photosystem I 4.8K protein
Similarity search - Component
Biological speciesThermosynechococcus elongatus (Cyanobacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.85 Å
AuthorsKoelsch, A. / Radon, C. / Baumert, A. / Buerger, J. / Miehlke, T. / Lisdat, F. / Zouni, A. / Wendler, P.
Funding support Germany, 3items
OrganizationGrant numberCountry
German Research Foundation (DFG)EXC 2008/1 Germany
German Research Foundation (DFG)EXC 314/2 Germany
German Federal Ministry for Education and Research031B0557 A+B Germany
CitationJournal: Curr.Opin.Struct.Biol. / Year: 2020
Title: Current limits of structural biology: The transient interaction between cytochrome c6 and photosystem I
Authors: Koelsch, A. / Radon, C. / Golub, M. / Baumert, A. / Burger, J. / Miehlke, T. / Lisdat, F. / Feoktystov, A. / Pieper, J. / Zouni, A. / Wendler, P.
History
DepositionDec 18, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 16, 2020Provider: repository / Type: Initial release

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Structure visualization

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  • Deposited structure unit
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Photosystem I P700 chlorophyll a apoprotein A1
B: Photosystem I P700 chlorophyll a apoprotein A2
C: Photosystem I iron-sulfur center
D: Photosystem I reaction center subunit II
E: Photosystem I reaction center subunit IV
F: Photosystem I reaction center subunit III
I: Photosystem I reaction center subunit VIII
J: Photosystem I reaction center subunit IX
K: Photosystem I reaction center subunit PsaK
L: Photosystem I reaction center subunit XI
M: Photosystem I reaction center subunit XII
X: Photosystem I 4.8K protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)361,538146
Polymers255,54612
Non-polymers105,992134
Water3,909217
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: light scattering
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area215060 Å2
ΔGint-1666 kcal/mol
Surface area64820 Å2
MethodPISA

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Components

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Photosystem I ... , 12 types, 12 molecules ABCDEFIJKLMX

#1: Protein Photosystem I P700 chlorophyll a apoprotein A1 / / PsaA


Mass: 83267.773 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A405, photosystem I
#2: Protein Photosystem I P700 chlorophyll a apoprotein A2 / / PsaB


Mass: 83123.648 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A407, photosystem I
#3: Protein Photosystem I iron-sulfur center / / 9 kDa polypeptide / PSI-C / Photosystem I subunit VII / PsaC


Mass: 8809.207 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A415, photosystem I
#4: Protein Photosystem I reaction center subunit II / / Photosystem I 16 kDa polypeptide / PSI-D


Mass: 15389.494 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A420
#5: Protein Photosystem I reaction center subunit IV / / Photosystem I 8.1 kDa protein / p30 protein


Mass: 8399.485 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A423
#6: Protein Photosystem I reaction center subunit III / / PSI-F


Mass: 15129.358 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A401
#7: Protein/peptide Photosystem I reaction center subunit VIII /


Mass: 4325.245 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A427
#8: Protein/peptide Photosystem I reaction center subunit IX /


Mass: 4798.708 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A429
#9: Protein Photosystem I reaction center subunit PsaK / / Light-harvesting 8.0 kDa polypeptide / Photosystem I subunit X


Mass: 8483.983 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A425
#10: Protein Photosystem I reaction center subunit XI / / PSI subunit V / PSI-L


Mass: 16287.765 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: Q8DGB4
#11: Protein/peptide Photosystem I reaction center subunit XII / / PSI-M


Mass: 3426.115 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: P0A403
#12: Protein/peptide Photosystem I 4.8K protein /


Mass: 4104.939 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermosynechococcus elongatus (strain BP-1) (Cyanobacteria)
References: UniProt: Q8DKP6

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Non-polymers , 9 types, 351 molecules

#13: Chemical ChemComp-CL0 / CHLOROPHYLL A ISOMER / Chlorophyll a


Mass: 893.489 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C55H72MgN4O5
#14: Chemical...
ChemComp-CLA / CHLOROPHYLL A / Chlorophyll a


Mass: 893.489 Da / Num. of mol.: 96 / Source method: obtained synthetically / Formula: C55H72MgN4O5
#15: 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
#16: Chemical...
ChemComp-BCR / BETA-CAROTENE / Β-Carotene


Mass: 536.873 Da / Num. of mol.: 24 / Source method: obtained synthetically / Formula: C40H56
#17: Chemical
ChemComp-LHG / 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / Phosphatidylglycerol


Mass: 722.970 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C38H75O10P / Comment: phospholipid*YM
#18: Chemical ChemComp-SF4 / IRON/SULFUR CLUSTER / Iron–sulfur cluster


Mass: 351.640 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Fe4S4
#19: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca
#20: Chemical ChemComp-LMG / 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE


Mass: 787.158 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C45H86O10
#21: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 217 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN

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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: photosystem I / Type: COMPLEX / Entity ID: #1-#12 / Source: NATURAL
Molecular weightValue: 1 MDa / Experimental value: NO
Source (natural)Organism: Thermosynechococcus elongatus BP-1 (Cyanobacteria)
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
10.025 mMTricineTricine1
20.025 mMsodium chlorideNaClSodium chloride1
30.02 %n-Dodecyl beta-D-maltosideC24H46O111
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: Photosystem I was crosslinked with its electron donor cytochrome c6. Crosslinked particles are monodisperse.
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company
MicroscopyModel: FEI POLARA 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 32 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameVersionCategory
4CTFFIND4.1.10CTF correction
7Coot0.8.9.1model fitting
9RELION3initial Euler assignment
10RELION3final Euler assignment
12RELION33D reconstruction
13PHENIX1.15model refinement
CTF correctionDetails: CTFFIND4 was used to estimate contrast transfer function parameters. CTF correction was done in Relion 3.0.
Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.85 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 175999 / Symmetry type: POINT
Atomic model buildingPDB-ID: 1JB0

1jb0

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