2ACW

Crystal Structure of Medicago truncatula UGT71G1 complexed with UDP-glucose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.259 

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This is version 1.2 of the entry. See complete history


Literature

Crystal Structures of a Multifunctional Triterpene/Flavonoid Glycosyltransferase from Medicago truncatula.

Shao, H.He, X.Achnine, L.Blount, J.W.Dixon, R.A.Wang, X.

(2005) Plant Cell 17: 3141-3154

  • DOI: 10.1105/tpc.105.035055
  • Primary Citation of Related Structures:  
    2ACV, 2ACW

  • PubMed Abstract: 
  • Glycosylation is a ubiquitous reaction controlling the bioactivity and storage of plant natural products. Glycosylation of small molecules is catalyzed by a superfamily of glycosyltransferases (GTs) in most plant species studied to date. We present crystal structures of the UDP flavonoid/triterpene GT UGT71G1 from Medicago truncatula bound to UDP or UDP-glucose ...

    Glycosylation is a ubiquitous reaction controlling the bioactivity and storage of plant natural products. Glycosylation of small molecules is catalyzed by a superfamily of glycosyltransferases (GTs) in most plant species studied to date. We present crystal structures of the UDP flavonoid/triterpene GT UGT71G1 from Medicago truncatula bound to UDP or UDP-glucose. The structures reveal the key residues involved in the recognition of donor substrate and, by comparison with other GT structures, suggest His-22 as the catalytic base and Asp-121 as a key residue that may assist deprotonation of the acceptor by forming an electron transfer chain with the catalytic base. Mutagenesis confirmed the roles of these key residues in donor substrate binding and enzyme activity. Our results provide an initial structural basis for understanding the complex substrate specificity and regiospecificity underlying the glycosylation of plant natural products and other small molecules. This information will direct future attempts to engineer bioactive compounds in crop plants to improve plant, animal, and human health and to facilitate the rational design of GTs to improve the storage and stability of novel engineered bioactive compounds.


    Organizational Affiliation

    Plant Biology Division, Samuel Roberts Noble Foundation, Ardmore, Oklahoma 73401, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
triterpene UDP-glucosyl transferase UGT71G1A, B465Medicago truncatulaMutation(s): 0 
Gene Names: 11410948MTR_5g070090MtrunA17_Chr5g0429711
EC: 2.4.1
UniProt
Find proteins for Q5IFH7 (Medicago truncatula)
Explore Q5IFH7 
Go to UniProtKB:  Q5IFH7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UPG (Subject of Investigation/LOI)
Query on UPG

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]URIDINE-5'-DIPHOSPHATE-GLUCOSE
C15 H24 N2 O17 P2
HSCJRCZFDFQWRP-JZMIEXBBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.259 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.523α = 90
b = 90.662β = 102.67
c = 101.581γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-11-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance