The crystal structure of CsFAOMT2 in complex with SAH

Experimental Data Snapshot

  • Resolution: 1.34 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.164 

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Characterization of two O-methyltransferases involved in the biosynthesis of O-methylated catechins in tea plant.

Jin, J.Q.Qu, F.R.Huang, H.Liu, Q.S.Wei, M.Y.Zhou, Y.Huang, K.L.Cui, Z.Chen, J.D.Dai, W.D.Zhu, L.Yao, M.Z.Zhang, Z.M.Chen, L.

(2023) Nat Commun 14: 5075-5075

  • DOI: https://doi.org/10.1038/s41467-023-40868-9
  • Primary Citation of Related Structures:  
    8GXN, 8GXO

  • PubMed Abstract: 

    Tea is known for having a high catechin content, with the main component being (-)-epigallocatechin gallate (EGCG), which has significant bioactivities, including potential anti-cancer and anti-inflammatory activity. The poor intestinal stability and permeability of EGCG, however, undermine these health-improving benefits. O-methylated EGCG derivatives, found in a few tea cultivars in low levels, have attracted considerable interest due to their increased bioavailability. Here, we identify two O-methyltransferases from tea plant: CsFAOMT1 that has a specific O-methyltransferase activity on the 3''-position of EGCG to generate EGCG3''Me, and CsFAOMT2 that predominantly catalyzes the formation of EGCG4″Me. In different tea tissues and germplasms, the transcript levels of CsFAOMT1 and CsFAOMT2 are strongly correlated with the amounts of EGCG3''Me and EGCG4''Me, respectively. Furthermore, the crystal structures of CsFAOMT1 and CsFAOMT2 reveal the key residues necessary for 3''- and 4''-O-methylation. These findings may provide guidance for the future development of tea cultivars with high O-methylated catechin content.

  • Organizational Affiliation

    Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs; Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
caffeyl-CoA-O-methyltransferaseA [auth B]236TheaceaeMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.34 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.164 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.688α = 90
b = 74.688β = 90
c = 81.523γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-20
    Type: Initial release
  • Version 1.1: 2023-11-01
    Changes: Database references