1QZV

Crystal structure of plant photosystem I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.44 Å
  • R-Value Free: 0.420 
  • R-Value Work: 0.410 
  • R-Value Observed: 0.410 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of plant photosystem I.

Ben-Shem, A.Frolow, F.Nelson, N.

(2003) Nature 426: 630-635

  • DOI: 10.1038/nature02200
  • Primary Citation of Related Structures:  
    1QZV

  • PubMed Abstract: 
  • Oxygenic photosynthesis is the principal producer of both oxygen and organic matter on Earth. The conversion of sunlight into chemical energy is driven by two multisubunit membrane protein complexes named photosystem I and II. We determined the cryst ...

    Oxygenic photosynthesis is the principal producer of both oxygen and organic matter on Earth. The conversion of sunlight into chemical energy is driven by two multisubunit membrane protein complexes named photosystem I and II. We determined the crystal structure of the complete photosystem I (PSI) from a higher plant (Pisum sativum var. alaska) to 4.4 A resolution. Its intricate structure shows 12 core subunits, 4 different light-harvesting membrane proteins (LHCI) assembled in a half-moon shape on one side of the core, 45 transmembrane helices, 167 chlorophylls, 3 Fe-S clusters and 2 phylloquinones. About 20 chlorophylls are positioned in strategic locations in the cleft between LHCI and the core. This structure provides a framework for exploration not only of energy and electron transfer but also of the evolutionary forces that shaped the photosynthetic apparatus of terrestrial plants after the divergence of chloroplasts from marine cyanobacteria one billion years ago.


    Organizational Affiliation

    Department of Biochemistry, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAAAP726Pisum sativumMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSABBQ732Pisum sativumMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSACCR80Pisum sativumMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSADDS154Pisum sativumMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAEET64Pisum sativumMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAFFU154Pisum sativumMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAGGV74Pisum sativumMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAHHW52Pisum sativumMutation(s): 0 
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAIIY30Pisum sativumMutation(s): 0 
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAJJZ41Pisum sativumMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAK5K42Pisum sativumMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT PHOTOSYSTEM I: SUBUNIT PSAL6L135Pisum sativumMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT LIGHT HARVESTING COMPLEX I(LHCI): SUBUNIT LHCA117109Pisum sativumMutation(s): 0 
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT LIGHT HARVESTING COMPLEX I(LHCI): SUBUNIT LHCA228115Pisum sativumMutation(s): 0 
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT LIGHT HARVESTING COMPLEX I(LHCI): SUBUNIT LHCA339117Pisum sativumMutation(s): 0 
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
PLANT LIGHT HARVESTING COMPLEX I(LHCI): SUBUNIT LHCA404119Pisum sativumMutation(s): 0 
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CLA
Query on CLA

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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, F, G, H, J, K, L, P, Q, U, V, W, Z
CHLOROPHYLL A
C55 H72 Mg N4 O5
VIQFHHZSLDFWDU-AENOIHSZSA-M
 Ligand Interaction
PQN
Query on PQN

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A, B, P, Q
PHYLLOQUINONE
C31 H46 O2
MBWXNTAXLNYFJB-NKFFZRIASA-N
 Ligand Interaction
SF4
Query on SF4

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A, C, P, R
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.44 Å
  • R-Value Free: 0.420 
  • R-Value Work: 0.410 
  • R-Value Observed: 0.410 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 182.283α = 90
b = 190.376β = 90.48
c = 220.253γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-01-06
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2012-07-25
    Changes: Non-polymer description