Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.191 

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This is version 1.3 of the entry. See complete history


Crystal structures of the photosystem II D1 C-terminal processing protease.

Liao, D.I.Qian, J.Chisholm, D.A.Jordan, D.B.Diner, B.A.

(2000) Nat Struct Biol 7: 749-753

  • DOI: https://doi.org/10.1038/78973
  • Primary Citation of Related Structures:  
    1FC6, 1FC7, 1FC9, 1FCF

  • PubMed Abstract: 

    We report here the first three-dimensional structure of the D1 C-terminal processing protease (D1P), which is encoded by the ctpA gene. This enzyme removes the C-terminal extension of the D1 polypeptide of photosystem II of oxygenic photosynthesis. Proteolytic processing is necessary to allow the light driven assembly of the tetranuclear manganese cluster, which is responsible for photosynthetic water oxidation. The X-ray structure of the Scenedesmus obliquus enzyme has been determined at 1.8 A resolution using the multiwavelength anomalous dispersion method. The enzyme is monomeric and is composed of three folding domains. The middle domain is topologically homologous to known PDZ motifs and is proposed to be the site at which the substrate C-terminus binds. The remainder of the substrate likely extends across the face of the enzyme, interacting at its scissile bond with the enzyme active site Ser 372 / Lys 397 catalytic dyad, which lies at the center of the protein at the interface of the three domains.

  • Organizational Affiliation

    E. I. du Pont de Nemours & Company, Central Research and Development, Experimental Station, Wilmington, Delaware 19880, USA. der-ing.liao@usa.dupont.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PHOTOSYSTEM II D1 PROTEASE388Tetradesmus obliquusMutation(s): 0 
Find proteins for O04073 (Tetradesmus obliquus)
Explore O04073 
Go to UniProtKB:  O04073
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO04073
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.191 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.6α = 90
b = 63.1β = 119.8
c = 60.7γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection