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Molecular Characterization of WRKY Transcription Factors That Act as Negative Regulators of O-Methylated Catechin Biosynthesis in Tea Plants ( Came…

A new interesting article has been published in J Agric Food Chem. 2018 Oct 23. doi: 10.1021/acs.jafc.8b02175. [Epub ahead of print] and titled:

Molecular Characterization of WRKY Transcription Factors That Act as Negative Regulators of O-Methylated Catechin Biosynthesis in Tea Plants ( Came…

Authors of this article are:

Luo Y, Yu S, Li J, Li Q, Wang K, Huang J, Liu Z.

A summary of the article is shown below:

Tea O-methylated catechins, especially (-)-epigallocatechin 3- O-(3- O-methyl)gallate (EGCG3″Me), have been attracting much attention as a result of their positive health effects. The transcription regulators of O-methylated catechin biosynthesis remain elusive. In this study, the expression pattern of genes related to O-methylated catechin biosynthesis, including CsLAR, CsANS, CsDFR, CsANR, and CCoAOMT, in three tea cultivars with different contents of EGCG3″Me was investigated. Two WRKY transcription factors (TFs), designated as CsWRKY31 and CsWRKY48, belonging to groups IIb and IIc of the WRKY family, respectively, were further identified. CsWRKY31 and CsWRKY48 were nuclear-localized proteins and possessed transcriptional repression ability. Furthermore, expression of CsWRKY31 and CsWRKY48 showed negative correlation with CsLAR, CsDFR, and CCoAOMT during EGCG3″Me accumulation in tea leaves. More importantly, W-box (C/T)TGAC(T/C) elements were located in the promoter of CsLAR, CsDFR, and CCoAOMT, and further assays revealed that CsWRKY31 and CsWRKY48 were capable of repressing the transcription of CsLAR, CsDFR, and CCoAOMT via the attachment of their promoters to the W-box elements. Collectively, our findings identify two novel negative regulators of O-methylated catechin biosynthesis in tea plants, which might provide a potential strategy to breed high-quality tea cultivar.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

Camellia sinensis;EGCG3″Me;WRKY;catechin biosynthesis;transcriptional regulator

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