GuApiGT (UGT79B74)

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Insights into the missing apiosylation step in flavonoid apiosides biosynthesis of Leguminosae plants.

Wang, H.T.Wang, Z.L.Chen, K.Yao, M.J.Zhang, M.Wang, R.S.Zhang, J.H.Agren, H.Li, F.D.Li, J.Qiao, X.Ye, M.

(2023) Nat Commun 14: 6658-6658

  • DOI: https://doi.org/10.1038/s41467-023-42393-1
  • Primary Citation of Related Structures:  
    8HZZ, 8I0D, 8I0E

  • PubMed Abstract: 

    Apiose is a natural pentose containing an unusual branched-chain structure. Apiosides are bioactive natural products widely present in the plant kingdom. However, little is known on the key apiosylation reaction in the biosynthetic pathways of apiosides. In this work, we discover an apiosyltransferase GuApiGT from Glycyrrhiza uralensis. GuApiGT could efficiently catalyze 2″-O-apiosylation of flavonoid glycosides, and exhibits strict selectivity towards UDP-apiose. We further solve the crystal structure of GuApiGT, determine a key sugar-binding motif (RLGSDH) through structural analysis and theoretical calculations, and obtain mutants with altered sugar selectivity through protein engineering. Moreover, we discover 121 candidate apiosyltransferase genes from Leguminosae plants, and identify the functions of 4 enzymes. Finally, we introduce GuApiGT and its upstream genes into Nicotiana benthamiana, and complete de novo biosynthesis of a series of flavonoid apiosides. This work reports an efficient phenolic apiosyltransferase, and reveals mechanisms for its sugar donor selectivity.

  • Organizational Affiliation

    State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing, 100191, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
454Glycyrrhiza uralensisMutation(s): 0 
Find proteins for A0AA51Z2W4 (Glycyrrhiza uralensis)
Explore A0AA51Z2W4 
Go to UniProtKB:  A0AA51Z2W4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0AA51Z2W4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 161.159α = 90
b = 128.676β = 91.07
c = 47.564γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China81891010/81891011

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-20
    Type: Initial release
  • Version 1.1: 2023-10-18
    Changes: Refinement description
  • Version 1.2: 2024-04-03
    Changes: Database references