Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 47.64 kDa 
• Atom Count: 3537 
• Modelled Residue Count: 443 
• Deposited Residue Count: 455 
• Unique protein chains: 1

2GG4

CP4 EPSP synthase (unliganded)

• DOI: 10.2210/pdb2GG4/pdb

• Classification: TRANSFERASE
• Organism(s): Agrobacterium sp. CP4
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-03-23 Released: 2006-08-22 
• Deposition Author(s): Schonbrunn, E., Funke, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.230 
• R-Value Work: 0.180 
• R-Value Observed: 0.180 

Literature

Molecular basis for the herbicide resistance of Roundup Ready crops.

Funke, T., Han, H., Healy-Fried, M.L., Fischer, M., Schonbrunn, E.

(2006) Proc Natl Acad Sci U S A 103: 13010-13015

• PubMed: 16916934 
• DOI: 10.1073/pnas.0603638103
• Primary Citation of Related Structures:  
  2GGD, 2GG6, 2GG4, 2GGA


• PubMed Abstract: 
  

The engineering of transgenic crops resistant to the broad-spectrum herbicide glyphosate has greatly improved agricultural efficiency worldwide. Glyphosate-based herbicides, such as Roundup, target the shikimate pathway enzyme 5-enolpyruvylshikimate 3-phosphate (EPSP) synthase, the functionality of which is absolutely required for the survival of plants. Roundup Ready plants carry the gene coding for a glyphosate-insensitive form of this enzyme, obtained from Agrobacterium sp. strain CP4. Once incorporated into the plant genome, the gene product, CP4 EPSP synthase, confers crop resistance to glyphosate. Although widely used, the molecular basis for this glyphosate-resistance has remained obscure. We generated a synthetic gene coding for CP4 EPSP synthase and characterized the enzyme using kinetics and crystallography. The CP4 enzyme has unexpected kinetic and structural properties that render it unique among the known EPSP synthases. Glyphosate binds to the CP4 EPSP synthase in a condensed, noninhibitory conformation. Glyphosate sensitivity can be restored through a single-site mutation in the active site (Ala-100-Gly), allowing glyphosate to bind in its extended, inhibitory conformation.

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Organizational Affiliation: 

Department of Medicinal Chemistry, University of Kansas, Lawrence, 66045, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-phosphoshikimate 1-carboxyvinyltransferase	A	455	Agrobacterium sp. CP4	Mutation(s): 0  Gene Names: aroA EC: 2.5.1.19
UniProt
Find proteins for Q9R4E4 (Agrobacterium sp. (strain CP4)) Explore Q9R4E4  Go to UniProtKB:  Q9R4E4

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.230 
• R-Value Work: 0.180 
• R-Value Observed: 0.180 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.49	α = 90
b = 76.51	β = 90
c = 88.88	γ = 90

Software Package:

Software Name	Purpose
CrystalClear	data collection
XDS	data reduction
CNS	refinement
CrystalClear	data reduction
XDS	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-03-23 
• Released Date: 2006-08-22 
Deposition Author(s): Schonbrunn, E., Funke, T.

Revision History  

• Version 1.0: 2006-08-22
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance