4YVQ

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.401 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

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:  

  • 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 ...

    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

    From the School of Life Sciences, Anhui University, Hefei, Anhui 230601.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamyl-tRNA reductase 1, chloroplastic
A
105Arabidopsis thalianaMutation(s): 0 
Gene Names: HEMA1 (HEMA)
EC: 1.2.1.70
Find proteins for P42804 (Arabidopsis thaliana)
Go to UniProtKB:  P42804
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein FLUORESCENT IN BLUE LIGHT, chloroplastic
C
159Arabidopsis thalianaMutation(s): 0 
Gene Names: FLU
Find proteins for Q940U6 (Arabidopsis thaliana)
Go to UniProtKB:  Q940U6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.401 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 74.735α = 90.00
b = 74.735β = 90.00
c = 161.659γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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