5X56

Crystal structure of PSB27 from Arabidopsis thaliana


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of Psb27 from Arabidopsis thaliana determined at a resolution of 1.85 angstrom.

Cheng, X.Liu, J.Huan, Z.Fudong, L.Shuya, Z.Min, X.Ke, R.Yuhua, W.Aigen, F.

(2018) Photosynth Res 136: 139-146

  • DOI: https://doi.org/10.1007/s11120-017-0450-3
  • Primary Citation of Related Structures:  
    5X56

  • PubMed Abstract: 

    Proper biogenesis and maintenance of photosynthetic thylakoid membrane complexes are essential for the photosynthetic light reactions. A thylakoid lumenal protein, Psb27, plays a vital role in assembly or/and maintenance of photosystem II (PSII). In cyanobacteria, it is a small lipoprotein docked to the lumenal side of PSII, and functions in the assembly of the Mn 4 Ca cluster and in the PSII repair cycle. However, Psb27 from Arabidopsis thaliana is not a lipoprotein, and it is involved in PSII repair and acclimation to fluctuating light stress, suggesting a functional divergence between Arabidopsis Psb27 and cyanobacterial Psb27s. To gain a better understanding of Psb27 from higher plants, we determined the crystal structure of Arabidopsis Psb27 by X-ray crystallography at a resolution of 1.85 Å. The structure of Arabidopsis Psb27 is a four-helix bundle, similar to its orthologues from cyanobacteria. However, there are several structural differences between Arabidopsis Psb27 and cyanobacterial Psb27s concerning the overall molecular shape, the N- and C-terminal structures, and the surface charge. These differences suggest that Psb27 from higher plants and cyanobacteria may function differently.


  • Organizational Affiliation

    Chinese Education Ministry's Key Laboratory of Western Resources and Modern Biotechnology, Key Laboratory of Biotechnology Shaanxi Province, College of Life Sciences, Northwest University, 229 North Taibai Road, Xi'an, 710069, Shaanxi, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Photosystem II repair protein PSB27-H1, chloroplastic
A, B
106Arabidopsis thalianaMutation(s): 0 
Gene Names: PSB27-1At1g03600F21B7.14F21B7.21F21B7.22F21B7_140
UniProt
Find proteins for Q9LR64 (Arabidopsis thaliana)
Explore Q9LR64 
Go to UniProtKB:  Q9LR64
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9LR64
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.26α = 90
b = 62.4β = 112.63
c = 38.96γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PDB_EXTRACTdata extraction
iMOSFLMdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2018-04-25
    Changes: Data collection, Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description