3RRW

Crystal structure of the TL29 protein from Arabidopsis thaliana


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the TL29 protein from Arabidopsis thaliana: An APX homolog without peroxidase activity.

Lundberg, E.Storm, P.Schroder, W.P.Funk, C.

(2011) J Struct Biol 176: 24-31

  • DOI: 10.1016/j.jsb.2011.07.004
  • Primary Citation of Related Structures:  
    3RRW

  • PubMed Abstract: 
  • TL29 is a plant-specific protein found in the thylakoid lumen of chloroplasts. Despite the putative requirement in plants for a peroxidase close to the site of photosynthetic oxygen production, and the sequence homology of TL29 to ascorbate peroxidases, so far biochemical methods have not shown this enzyme to possess peroxidase activity ...

    TL29 is a plant-specific protein found in the thylakoid lumen of chloroplasts. Despite the putative requirement in plants for a peroxidase close to the site of photosynthetic oxygen production, and the sequence homology of TL29 to ascorbate peroxidases, so far biochemical methods have not shown this enzyme to possess peroxidase activity. Here we report the three-dimensional X-ray crystal structure of recombinant TL29 from Arabidopsis thaliana at a resolution of 2.5Å. The overall structure of TL29 is mainly alpha helical with six longer and six shorter helical segments. The TL29 structure resembles that of typical ascorbate peroxidases, however, crucial differences were found in regions that would be important for heme and ascorbate binding. Such differences suggest it to be highly unlikely that TL29 functions as a peroxidase.


    Organizational Affiliation

    Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thylakoid lumenal 29 kDa protein, chloroplasticA, B268Arabidopsis thalianaMutation(s): 0 
Gene Names: TL29APX4At4g09010F23J3.40
EC: 1
UniProt
Find proteins for P82281 (Arabidopsis thaliana)
Explore P82281 
Go to UniProtKB:  P82281
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP82281
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.35α = 90
b = 92.35β = 90
c = 143.46γ = 90
Software Package:
Software NamePurpose
MAR345data collection
PHENIXmodel building
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-03
    Type: Initial release
  • Version 1.1: 2011-08-17
    Changes: Database references
  • Version 1.2: 2011-09-21
    Changes: Database references
  • Version 1.3: 2017-11-08
    Changes: Data collection, Refinement description