Sterol 3-beta-glucosyltransferase (ugt51) from Saccharomyces cerevisiae (strain ATCC 204508 / S288c): UDPG complex

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

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This is version 1.2 of the entry. See complete history


Structural Dissection of Sterol Glycosyltransferase UGT51 from Saccharomyces cerevisiae for Substrate Specificity.

Chen, L.-Q.Zhang, Y.Feng, Y.

(2018) J Struct Biol 

  • DOI: https://doi.org/10.1016/j.jsb.2018.11.001
  • Primary Citation of Related Structures:  
    5GL5, 5XVM

  • PubMed Abstract: 

    Sterol glycosyltransferases catalyze the formation of a variety of glycosylated sterol derivatives and are involved in producing a plethora of bioactive natural products. To understand the molecular mechanism of sterol glycosyltransferases, we determined crystal structures of a sterol glycosyltransferase UGT51 from Saccharomyces cerevisiae. The structures of the UGT51 and its complex with uridine diphosphate glucose (UDPG) were solved at resolutions of 2.77 Å and 1.9 Å, respectively. The structural analysis revealed that a long hydrophobic cavity, 9.2 Å in width and 17.6 Å in length located at the N-terminal domain of UGT51, is suitable for the accommodation of sterol acceptor substrates. Furthermore, a short, conserved sequence of S847-M851 was identified at the bottom of the hydrophobic cavity, which might be the steroid binding site and play an important role for the UGT51 catalytic specificity towards sterols. Molecular docking simulations indicated that changed unique interaction network in mutant M7_1 (S 801 A/L 802 A/V 804 A/K 812 A/E 816 K/S 849 A/N 892 D), with an 1800-fold activity improvement toward an unnatural substrate protopanaxadiol (PPD), might influence its substrate preference. This study reported the first sterol glycosyltransferase structure, providing a molecular blueprint for generating tailored sterol glycosyltransferases as potential catalytic elements in synthetic biology.

  • Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sterol 3-beta-glucosyltransferase
A, B
498Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: ATG26UGT51YLR189C
Find proteins for Q06321 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q06321 
Go to UniProtKB:  Q06321
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06321
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on UPG

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C15 H24 N2 O17 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.66α = 90
b = 80.562β = 90
c = 154.587γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2018-11-14
    Changes: Data collection, Database references
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Refinement description