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Wang Y, Ma H, Liu Z, Zhao P, Liu J, Zhu H, Zhou Y, Man Y, Zhou X. The Elongation Factor 1 Alpha Promoter Drives the Functional Expression of Kir2A in Plutella xylostella Cells. Int J Mol Sci 2025; 26:3042. [PMID: 40243678 PMCID: PMC11989005 DOI: 10.3390/ijms26073042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2025] [Revised: 03/14/2025] [Accepted: 03/25/2025] [Indexed: 04/18/2025] Open
Abstract
Cell lines and their corresponding expression plasmids are extensively utilized in the study of insect physiology and pathology. In this research, four single-cell cultured lines (Px4-1 to Px4-4) of Plutella xylostella were established from eggs. The promoter for the P. xylostella elongation factor 1α (PxEF1α), known for its high driving activity in cells, was cloned and used to construct expression plasmids. Dual-luciferase activity assays and EGFP expression analyses demonstrated that the PxEF1α promoter exhibited the strongest driving activity in Px4-2 cells, comparable to that of the immediate-early 1 promoter associated with the homologous region 5 enhancer (AcIE1hr5) from the Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV). In contrast, the driving activity of PxEF1α in cells derived from Spodoptera frugiperda, Trichoplusia ni, and Helicoverpa armigera was lower. Furthermore, the PxEF1α promoter was successfully employed to drive inward rectifier potassium 2A (Kir2A) expression in Px4-2 cells. The electrophysiological properties of the insect Kir2A channel were successfully characterized for the first time. It was observed that the PxKir2A channel possesses typical inward rectifier potassium channel properties and can be inhibited by nanomolar concentrations of VU625 and VU590. This study offers a novel approach for the expression and investigation of foreign gene function in insect cells and provides a valuable tool for the in-depth study of key biomolecules in P. xylostella.
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Affiliation(s)
- Yinna Wang
- Longping Branch, College of Biology, Hunan University, Changsha 410125, China;
- College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Haihao Ma
- Longping Branch, College of Biology, Hunan University, Changsha 410125, China;
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Zheming Liu
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Piao Zhao
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Jia Liu
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Hang Zhu
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Yong Zhou
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Yilong Man
- Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China; (Z.L.); (P.Z.); (J.L.); (H.Z.); (Y.Z.); (Y.M.)
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
| | - Xiaomao Zhou
- Longping Branch, College of Biology, Hunan University, Changsha 410125, China;
- College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Changsha 410125, China
- Key Laboratory of Pesticide Assessment, Ministry of Agriculture and Rural Affairs, Changsha 410125, China
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Comparative genomic analysis of three geographical isolates from China reveals high genetic stability of Plutella xylostella granulovirus. PLoS One 2021; 16:e0243143. [PMID: 33444318 PMCID: PMC7808651 DOI: 10.1371/journal.pone.0243143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 11/17/2020] [Indexed: 11/29/2022] Open
Abstract
In this study, the genomes of three Plutella xylostella granulovirus (PlxyGV) isolates, PlxyGV-W and PlxyGV-Wn from near Wuhan and PlxyGV-B from near Beijing, China were completely sequenced and comparatively analyzed to investigate genetic stability and diversity of PlxyGV. PlxyGV-W, PlxyGV-B and PlxyGV-Wn consist of 100,941bp, 100,972bp and 100,999bp in length with G + C compositions of 40.71–40.73%, respectively, and share nucleotide sequence identities of 99.5–99.8%. The three individual isolates contain 118 putative protein-encoding ORFs in common. PlxyGV-W, PlxyGV-B and PlxyGV-Wn have ten, nineteen and six nonsynonymous intra isolate nucleotide polymorphisms (NPs) in six, fourteen and five ORFs, respectively, including homologs of five DNA replication/late expression factors and two per os infectivity factors. There are seventeen nonsynonymous inter isolate NPs in seven ORFs between PlxyGV-W and PlxyGV-B, seventy three nonsynonymous NPs in forty seven ORFs between PlxyGV-W and PlxyGV-Wn, seventy seven nonsynonymous NPs in forty six ORFs between PlxyGV-B and PlxyGV-Wn. Alignment of the genome sequences of nine PlxyGV isolates sequenced up to date shows that the sequence homogeneity between the genomes are over 99.4%, with the exception of the genome of PlxyGV-SA from South Africa, which shares a sequence identity of 98.6–98.7% with the other ones. No events of gene gain/loss or translocations were observed. These results suggest that PlxyGV genome is fairly stable in nature. In addition, the transcription start sites and polyadenylation sites of thirteen PlxyGV-specific ORFs, conserved in all PlxyGV isolates, were identified by RACE analysis using mRNAs purified from larvae infected by PlxyGV-Wn, proving the PlxyGV-specific ORFs are all genuine genes.
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