5MJO

Structure of Psb29 at 1.55A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.133 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of Psb29/Thf1 and its association with the FtsH protease complex involved in photosystem II repair in cyanobacteria.

Bec Kova, M.Yu, J.Krynicka, V.Kozlo, A.Shao, S.Konik, P.Komenda, J.Murray, J.W.Nixon, P.J.

(2017) Philos. Trans. R. Soc. Lond., B, Biol. Sci. 372: --

  • DOI: 10.1098/rstb.2016.0394
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • One strategy for enhancing photosynthesis in crop plants is to improve their ability to repair photosystem II (PSII) in response to irreversible damage by light. Despite the pivotal role of thylakoid-embedded FtsH protease complexes in the selective ...

    One strategy for enhancing photosynthesis in crop plants is to improve their ability to repair photosystem II (PSII) in response to irreversible damage by light. Despite the pivotal role of thylakoid-embedded FtsH protease complexes in the selective degradation of PSII subunits during repair, little is known about the factors involved in regulating FtsH expression. Here we show using the cyanobacterium Synechocystis sp. PCC 6803 that the Psb29 subunit, originally identified as a minor component of His-tagged PSII preparations, physically interacts with FtsH complexes in vivo and is required for normal accumulation of the FtsH2/FtsH3 hetero-oligomeric complex involved in PSII repair. We show using X-ray crystallography that Psb29 from Thermosynechococcus elongatus has a unique fold consisting of a helical bundle and an extended C-terminal helix and contains a highly conserved region that might be involved in binding to FtsH. A similar interaction is likely to occur in Arabidopsis chloroplasts between the Psb29 homologue, termed THF1, and the FTSH2/FTSH5 complex. The direct involvement of Psb29/THF1 in FtsH accumulation helps explain why THF1 is a target during the hypersensitive response in plants induced by pathogen infection. Downregulating FtsH function and the PSII repair cycle via THF1 would contribute to the production of reactive oxygen species, the loss of chloroplast function and cell death.This article is part of the themed issue 'Enhancing photosynthesis in crop plants: targets for improvement'.


    Organizational Affiliation

    Institute of Microbiology, Center Algatech, Opatovický mlýn, 37981 Třeboň, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Thf1
A
239Thermosynechococcus elongatus (strain BP-1)Mutation(s): 0 
Gene Names: thf1
Find proteins for Q8DJT8 (Thermosynechococcus elongatus (strain BP-1))
Go to UniProtKB:  Q8DJT8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
HG
Query on HG

Download SDF File 
Download CCD File 
A
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.133 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 31.240α = 90.00
b = 56.730β = 104.72
c = 47.730γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
xia2data scaling
autoSHARPphasing
xia2data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/I00937X/1
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/L003260/1

Revision History 

  • Version 1.0: 2017-08-23
    Type: Initial release