Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.91 kDa 
• Atom Count: 1691 
• Modelled Residue Count: 203 
• Deposited Residue Count: 264 
• Unique protein chains: 2

4YVQ

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

• PDB DOI: 10.2210/pdb4YVQ/pdb

• Classification: OXIDOREDUCTASE/FLUORESCENT PROTEIN
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-03-20 Released: 2015-06-10 
• Deposition Author(s): Zhang, M., Zhang, F., Liu, L.

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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 

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

• PubMed: 26037924 
• 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). 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.

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Organizational Affiliation: 

the Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China, and [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glutamyl-tRNA reductase 1, chloroplastic	A	105	Arabidopsis thaliana	Mutation(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

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein FLUORESCENT IN BLUE LIGHT, chloroplastic	B [auth C]	159	Arabidopsis thaliana	Mutation(s): 0  Gene Names: FLU, At3g14110, MAG2.7
UniProt
Find proteins for Q940U6 (Arabidopsis thaliana) Explore Q940U6  Go to UniProtKB:  Q940U6

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 = 74.735	α = 90
b = 74.735	β = 90
c = 161.659	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-03-20 
• Released Date: 2015-06-10 
Deposition Author(s): Zhang, M., Zhang, F., Liu, L.

Revision History  

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