apo form of the glycosyltransferase

Experimental Data Snapshot

  • Resolution: 1.77 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.166 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Catalytic flexibility of rice glycosyltransferase OsUGT91C1 for the production of palatable steviol glycosides.

Zhang, J.Tang, M.Chen, Y.Ke, D.Zhou, J.Xu, X.Yang, W.He, J.Dong, H.Wei, Y.Naismith, J.H.Lin, Y.Zhu, X.Cheng, W.

(2021) Nat Commun 12: 7030-7030

  • DOI: https://doi.org/10.1038/s41467-021-27144-4
  • Primary Citation of Related Structures:  
    7ERX, 7ERY, 7ES0, 7ES1, 7ES2

  • PubMed Abstract: 

    Steviol glycosides are the intensely sweet components of extracts from Stevia rebaudiana. These molecules comprise an invariant steviol aglycone decorated with variable glycans and could widely serve as a low-calorie sweetener. However, the most desirable steviol glycosides Reb D and Reb M, devoid of unpleasant aftertaste, are naturally produced only in trace amounts due to low levels of specific β (1-2) glucosylation in Stevia. Here, we report the biochemical and structural characterization of OsUGT91C1, a glycosyltransferase from Oryza sativa, which is efficient at catalyzing β (1-2) glucosylation. The enzyme's ability to bind steviol glycoside substrate in three modes underlies its flexibility to catalyze β (1-2) glucosylation in two distinct orientations as well as β (1-6) glucosylation. Guided by the structural insights, we engineer this enzyme to enhance the desirable β (1-2) glucosylation, eliminate β (1-6) glucosylation, and obtain a promising catalyst for the industrial production of naturally rare but palatable steviol glycosides.

  • Organizational Affiliation

    Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University, Sichuan University, 610065, Chengdu, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycosyltransferase470Oryza sativa Japonica GroupMutation(s): 0 
Gene Names: Os03g0702000OSNPB_030702000
EC: 2.4.1
Find proteins for Q0DPB7 (Oryza sativa subsp. japonica)
Explore Q0DPB7 
Go to UniProtKB:  Q0DPB7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ0DPB7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.77 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.166 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.268α = 90
b = 79.837β = 90
c = 105.413γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
DIALSdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

  • Released Date: 2021-12-08 
  • Deposition Author(s): Zhu, X.

Funding OrganizationLocationGrant Number
National Science Foundation (NSF, China)China31771910

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-08
    Type: Initial release
  • Version 1.1: 2021-12-15
    Changes: Database references
  • Version 1.2: 2024-04-03
    Changes: Data collection, Derived calculations, Refinement description