4YVQ

Crystal Structure of FLU-TPR in Complex with the C-terminal Region of GluTR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

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Literature

The Non-canonical Tetratricopeptide Repeat (TPR) Domain of Fluorescent (FLU) Mediates Complex Formation with Glutamyl-tRNA Reductase.

Zhang, M., Zhang, F., Fang, Y., Chen, X., Chen, Y., Zhang, W., Dai, H.E., Lin, R., Liu, L.

(2015) J Biol Chem 290: 17559-17565

  • DOI: 10.1074/jbc.M115.662981
  • Primary Citation of Related Structures:  
    4YVO, 4YVQ

  • PubMed Abstract: 

    • The tetratricopeptide repeat (TPR)-containing protein FLU is a negative regulator of chlorophyll biosynthesis in plants. It directly interacts through its TPR domain with glutamyl-tRNA reductase (GluTR), the rate-limiting enzyme in the formation of δ-aminolevulinic acid (ALA) ...

    The tetratricopeptide repeat (TPR)-containing protein FLU is a negative regulator of chlorophyll biosynthesis in plants. It directly interacts through its TPR domain with glutamyl-tRNA reductase (GluTR), the rate-limiting enzyme in the formation of δ-aminolevulinic acid (ALA). Delineation of how FLU binds to GluTR is important for understanding the molecular basis for FLU-mediated repression of synthesis of ALA, the universal tetrapyrrole precursor. Here, we characterize the FLU-GluTR interaction by solving the crystal structures of the uncomplexed TPR domain of FLU (FLU(TPR)) at 1.45-Å resolution and the complex of the dimeric domain of GluTR bound to FLU(TPR) at 2.4-Å resolution. Three non-canonical TPR motifs of each FLU(TPR) form a concave surface and clamp the helix bundle in the C-terminal dimeric domain of GluTR. We demonstrate that a 2:2 FLU(TPR)-GluTR complex is the functional unit for FLU-mediated GluTR regulation and suggest that the formation of the FLU-GluTR complex prevents glutamyl-tRNA, the GluTR substrate, from binding with this enzyme. These results also provide insights into the spatial regulation of ALA synthesis by the membrane-located FLU protein.

    Organizational Affiliation: 

    the Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China, and liulin@ibcas.ac.cn.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamyl-tRNA reductase 1, chloroplasticA105Arabidopsis thalianaMutation(s): 0 
Gene Names: HEMA1, HEMA, At1g58290, F19C14.9
EC: 1.2.1.70
UniProt
Find proteins for P42804 (Arabidopsis thaliana)
Explore P42804 
Go to UniProtKB:  P42804
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FLUORESCENT IN BLUE LIGHT, chloroplasticB [auth C]159Arabidopsis thalianaMutation(s): 0 
Gene Names: FLU, At3g14110, MAG2.7
UniProt
Find proteins for Q940U6 (Arabidopsis thaliana)
Explore Q940U6 
Go to UniProtKB:  Q940U6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.735α = 90
b = 74.735β = 90
c = 161.659γ = 120
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-10
    Type: Initial release
  • Version 1.1: 2015-07-22
    Changes: Database references, Structure summary