2PPS

PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Photosystem I at 4 A resolution represents the first structural model of a joint photosynthetic reaction centre and core antenna system.

Krauss, N.Schubert, W.D.Klukas, O.Fromme, P.Witt, H.T.Saenger, W.

(1996) Nat Struct Biol 3: 965-973

  • DOI: https://doi.org/10.1038/nsb1196-965
  • Primary Citation of Related Structures:  
    2PPS

  • PubMed Abstract: 

    The 4 A X-ray structure model of trimeric photosystem I of the cyanobacterium Synechococcus elongatus reveals 31 transmembrane, nine surface and three stromal alpha-helices per monomer, assigned to the 11 protein subunits: PsaA and PsaB are related by a pseudo two-fold axis normal to the membrane plane, along which the electron transfer pigments are arranged. 65 antenna chlorophyll a (Chl a) molecules separated by < or = 16 A form an oval, clustered net continuous with the electron transfer chain through the second and third Chl a pairs of the electron transfer system. This suggests a dual role for these Chl a both in excitation energy and electron transfer. The architecture of the protein core indicates quinone and iron-sulphur type reaction centres to have a common ancestor.


  • Organizational Affiliation

    Institut für Kristallographie, Freie Universität Berlin, Germany.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM I478Synechococcus elongatusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM I503Synechococcus elongatusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM IC [auth L]111Synechococcus elongatusMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM ID [auth K]64Synechococcus elongatusMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM IE [auth F]130Synechococcus elongatusMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM IF [auth C]80Synechococcus elongatusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CLA
Query on CLA

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AA [auth A]
AB [auth B]
AC [auth B]
BA [auth A]
BB [auth B]
CHLOROPHYLL A
C55 H72 Mg N4 O5
ATNHDLDRLWWWCB-AENOIHSZSA-M
PQN
Query on PQN

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YA [auth B]PHYLLOQUINONE
C31 H46 O2
MBWXNTAXLNYFJB-NKFFZRIASA-N
SF4
Query on SF4

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TC [auth C],
UC [auth C],
ZA [auth B]
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 286α = 90
b = 286β = 90
c = 167γ = 120
Software Package:
Software NamePurpose
MLPHAREphasing
MOSFLMdata reduction
CCP4data scaling
ROTAVATAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2024-02-21
    Changes: Data collection, Database references, Derived calculations, Non-polymer description, Refinement description