Chalcone Isomerase CDNA Cloning and MRNA Induction by Fungal Elicitor, Wounding and Infection
Overview
Molecular Biology
Affiliations
The environmentally regulated synthesis of phenylpropanoid natural products was studied by examining the expression of the gene encoding chalcone isomerase (CHI). This enzyme catalyzes a step common to the synthesis of flavonoid pigments and isoflavonoid phytoalexins. A lambdagt11 library was constructed using mRNA from cell cultures of bean (Phaseolus vulgaris L.) treated with fungal elicitor. Two positive clones were obtained by screening 10 recombinants with an antiserum to purified bean CHI. The identity of the cloned sequences was confirmed by hybrid-select translation and the production of antigenic polypeptides from transcripts synthesized in vitro. Addition of elicitor to cell cultures resulted in the rapid accumulation of CHI mRNA, with maximum levels achieved 3-4 h after elicitation. CHI mRNA also accumulated during the natural infection of hypocotyls with the fungal pathogen Colletotrichum lindemuthianum, and in mechanically wounded hypocotyls. The kinetics of accumulation of CHI mRNA in response to these environmental signals were strikingly similar to those of mRNAs encoding two other phenylpropanoid pathway enzymes, phenylalanine ammonialyase and chalcone synthase. In contrast to the multi-gene families encoding these two enzymes, chalcone isomerase is encoded by a single gene which is regulated by several environmental stimuli.
Si J, Zhou X, Chen X, Ming H, Liu H, Hui M Planta. 2025; 261(4):80.
PMID: 40048003 DOI: 10.1007/s00425-025-04630-3.
Chen L, Zhang Y, Li Q, Sun X, Gao J, Li D Planta. 2025; 261(2):35.
PMID: 39810063 DOI: 10.1007/s00425-024-04601-0.
New dual functional gene involves in isoflavone biosynthesis in L.
Xia Y, He C, Yan S, Liu J, Huang H, Li X Synth Syst Biotechnol. 2023; 8(1):157-167.
PMID: 36714060 PMC: 9860299. DOI: 10.1016/j.synbio.2023.01.002.
Wan Q, Bai T, Liu M, Liu Y, Xie Y, Zhang T Front Genet. 2022; 13:848141.
PMID: 35495138 PMC: 9039136. DOI: 10.3389/fgene.2022.848141.
Overexpression of chalcone isomerase A gene in Astragalus trigonus for stimulating apigenin.
Elarabi N, Abdelhadi A, Sief-Eldein A, Ismail I, Abdallah N Sci Rep. 2021; 11(1):24176.
PMID: 34921216 PMC: 8683443. DOI: 10.1038/s41598-021-03704-y.