| Title: | Alternative transcript splicing regulates UDP-glucosyltransferase-catalyzed detoxification of DIMBOA in the fall armyworm (Spodoptera frugiperda) |
| Author(s): | Israni B; Luck K; Romhild SCW; Raguschke B; Wielsch N; Hupfer Y; Reichelt M; Svatos A; Gershenzon J; Vassao DG; |
| Address: | "Max Planck Institute for Chemical Ecology, Jena, Germany. bisrani@ice.mpg.de. Max Planck Institute for Chemical Ecology, Jena, Germany. Max Planck Institute for Chemical Ecology, Jena, Germany. vassao@ice.mpg.de" |
| DOI: | 10.1038/s41598-022-14551-w |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Herbivorous insects often possess the ability to detoxify chemical defenses from their host plants. The fall armyworm (Spodoptera frugiperda), which feeds principally on maize, detoxifies the maize benzoxazinoid 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) by stereoselective re-glucosylation using a UDP-glucosyltransferase, SfUGT33F28. SfUGT33F28 activity is induced by feeding on a DIMBOA-containing diet, but how this induction is regulated is unknown. In the present work, we describe the alternative splicing of the SfUGT33F28 transcript. Variant transcripts are differentially expressed in response to DIMBOA, and this transcriptional response is mediated by an insect aryl hydrocarbon receptor. These variants have large deletions leading to the production of truncated proteins that have no intrinsic UGT activity with DIMBOA but interact with the full-length enzyme to raise or lower its activity. Therefore, the formation of SfUGT33F28 splice variants induces DIMBOA-conjugating UGT activity when DIMBOA is present in the insect diet and represses activity in the absence of this plant defense compound" |
| Keywords: | Alternative Splicing Animals *Benzoxazines/metabolism Biocatalysis Catalysis *Glucosyltransferases/metabolism Larva/genetics/metabolism Spodoptera/physiology Uridine Diphosphate/metabolism Zea mays/genetics/metabolism; |
| Notes: | "MedlineIsrani, Bhawana Luck, Katrin Romhild, Samantha C W Raguschke, Bettina Wielsch, Natalie Hupfer, Yvonne Reichelt, Michael Svatos, Ales Gershenzon, Jonathan Vassao, Daniel Giddings eng Research Support, Non-U.S. Gov't England 2022/06/21 Sci Rep. 2022 Jun 20; 12(1):10343. doi: 10.1038/s41598-022-14551-w" |
