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Strong loss-of-function or null mutants can sometimes lead to a penetrant early lethality, impairing the study of these genes' function. This is the case for the null mutant, which exhibits 100% penetrant lethality. Here, we describe how we used gene bashing to identify distinct regulatory regions in the locus. This allowed us to generate a null strain that is viable and still displays mutant Y-to-PDA transdifferentiation phenotype. Such strategy can be applied to many other mutants impacting viability.
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http://dx.doi.org/10.17912/micropub.biology.000339 | DOI Listing |
Cell Rep
April 2025
Department of Biochemistry and Cell Biology, Boston University Chobanian and Avedisian School of Medicine, Boston, MA, USA; Genome Science Institute, Boston University Chobanian and Avedisian School of Medicine, Boston, MA, USA. Electronic address:
Flamenco (Flam) is a prominent Piwi-interacting RNA (piRNA) locus expressed in Drosophila ovarian follicle cells that silences gypsy/mdg4 transposons to ensure female fertility. Promoter-bashing reporter assays in ovarian somatic sheet (OSS) cells uncover compact enhancer sequences within Flam. We confirm the enhancer sequence relevance in vivo with Drosophila Flam deletion mutants that compromise Flam piRNA levels and female fertility.
View Article and Find Full Text PDFMicroPubl Biol
January 2023
Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Hannoversche Str. 28, 10115 Berlin, Germany.
Gene regulation has been studied in for over 30 years. In this analysis of 102 publications, we find that most transcriptional cis-regulatory elements are located within 5,000 bp of the transcription start site. Over 75% of studies conclude that transcriptional elements and 5'UTRs activate-, while 3'UTRs repress gene expression.
View Article and Find Full Text PDFBiomolecules
February 2021
College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
Lung cancer is the world's highest morbidity and mortality of malignant tumors, with lung adenocarcinoma (LUAD) as a major subtype. The competitive endogenous RNA (ceRNA) regulative network provides opportunities to understand the relationships among different molecules, as well as the regulative mechanisms among them in order to investigate the whole transcriptome landscape in cancer pathology. We designed this work to explore the role of a key oncogene, MYC, in the pathogenesis of LUAD, and this study aims to identify important long noncoding RNA (lncRNA)-microRNA (miRNA)- transcription factor (TF) interactions in non-small cell lung cancer (NSCLC) using a bioinformatics analysis.
View Article and Find Full Text PDFMicroPubl Biol
December 2020
IGBMC, Development and Stem Cells Department, CNRS UMR7104, INSERM U1258, Université de Strasbourg, Illkirch CU Strasbourg, 67404 France.
Strong loss-of-function or null mutants can sometimes lead to a penetrant early lethality, impairing the study of these genes' function. This is the case for the null mutant, which exhibits 100% penetrant lethality. Here, we describe how we used gene bashing to identify distinct regulatory regions in the locus.
View Article and Find Full Text PDF