Wimmer, Ernst A.

[["dc.bibliographiccitation.artnumber","608"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","BMC Genomics"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Lehmann, Sabrina"],["dc.contributor.author","Atika, Bibi"],["dc.contributor.author","Grossmann, Daniela"],["dc.contributor.author","Schmitt-Engel, Christian"],["dc.contributor.author","Strohlein, Nadi"],["dc.contributor.author","Majumdar, Upalparna"],["dc.contributor.author","Richter, Tobias"],["dc.contributor.author","Weißkopf, Matthias"],["dc.contributor.author","Ansari, Salim"],["dc.contributor.author","Teuscher, Matthias"],["dc.contributor.author","Hakeemi, Muhammad S."],["dc.contributor.author","Li, Jianwei"],["dc.contributor.author","Weißbecker, Bernhard"],["dc.contributor.author","Klingler, Martin"],["dc.contributor.author","Bucher, Gregor"],["dc.contributor.author","Wimmer, Ernst A."],["dc.date.accessioned","2022-08-22T06:20:44Z"],["dc.date.available","2022-08-22T06:20:44Z"],["dc.date.issued","2022-08-20"],["dc.date.updated","2022-08-21T03:10:50Z"],["dc.description.abstract","Abstract\n \n Background\n Functional genomics uses unbiased systematic genome-wide gene disruption or analyzes natural variations such as gene expression profiles of different tissues from multicellular organisms to link gene functions to particular phenotypes. Functional genomics approaches are of particular importance to identify large sets of genes that are specifically important for a particular biological process beyond known candidate genes, or when the process has not been studied with genetic methods before.\n \n \n Results\n Here, we present a large set of genes whose disruption interferes with the function of the odoriferous defensive stink glands of the red flour beetle Tribolium castaneum. This gene set is the result of a large-scale systematic phenotypic screen using RNA interference applied in a genome-wide forward genetics manner. In this first-pass screen, 130 genes were identified, of which 69 genes could be confirmed to cause phenotypic changes in the glands upon knock-down, which vary from necrotic tissue and irregular reservoir size to irregular color or separation of the secreted gland compounds. Gene ontology analysis revealed that many of those genes are encoding enzymes (peptidases and cytochromes P450) as well as proteins involved in membrane trafficking with an enrichment in lysosome and mineral absorption pathways. The knock-down of 13 genes caused specifically a strong reduction of para-benzoquinones in the gland reservoirs, suggesting a specific function in the synthesis of these toxic compounds. Only 14 of the 69 confirmed gland genes are differentially overexpressed in stink gland tissue and thus could have been detected in a transcriptome-based analysis. However, only one out of eight genes identified by a transcriptomics approach known to cause phenotypic changes of the glands upon knock-down was recognized by this phenotypic screen, indicating the limitation of such a non-redundant first-pass screen.\n \n \n Conclusion\n Our results indicate the importance of combining diverse and independent methodologies to identify genes necessary for the function of a certain biological tissue, as the different approaches do not deliver redundant results but rather complement each other. The presented phenotypic screen together with a transcriptomics approach are now providing a set of close to hundred genes important for odoriferous defensive stink gland physiology in beetles."],["dc.identifier.citation","BMC Genomics. 2022 Aug 20;23(1):608"],["dc.identifier.doi","10.1186/s12864-022-08822-z"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/113084"],["dc.language.iso","en"],["dc.publisher","BioMed Central"],["dc.rights.holder","The Author(s)"],["dc.subject","Chemical ecology"],["dc.subject","Genome-wide"],["dc.subject","iBeetle"],["dc.subject","Odoriferous glands"],["dc.subject","RNA interference"],["dc.subject","RNAseq Tribolium castaneum"],["dc.title","Phenotypic screen and transcriptomics approach complement each other in functional genomics of defensive stink gland physiology"],["dc.type","journal_article"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","7822"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Schmitt-Engel, Christian"],["dc.contributor.author","Schultheis, Dorothea"],["dc.contributor.author","Schwirz, Jonas"],["dc.contributor.author","Stroehlein, Nadi"],["dc.contributor.author","Troelenberg, Nicole"],["dc.contributor.author","Majumdar, Upalparna"],["dc.contributor.author","Dao, Van Anh"],["dc.contributor.author","Grossmann, Daniela"],["dc.contributor.author","Richter, Tobias"],["dc.contributor.author","Tech, Maike"],["dc.contributor.author","Doenitz, Juergen"],["dc.contributor.author","Gerischer, Lizzy"],["dc.contributor.author","Theis, Mirko"],["dc.contributor.author","Schild, Inga"],["dc.contributor.author","Trauner, Jochen"],["dc.contributor.author","Koniszewski, Nikolaus Dieter Bernhard"],["dc.contributor.author","Kuester, Elke"],["dc.contributor.author","Kittelmann, Sebastian"],["dc.contributor.author","Hu, Yonggang"],["dc.contributor.author","Lehmann, Sabrina"],["dc.contributor.author","Siemanowski, Janna L."],["dc.contributor.author","Ulrich, Julia"],["dc.contributor.author","Panfilio, Kristen A."],["dc.contributor.author","Schroeder, Reinhard"],["dc.contributor.author","Morgenstern, Burkhard"],["dc.contributor.author","Stanke, Mario"],["dc.contributor.author","Buchhholz, Frank"],["dc.contributor.author","Frasch, Manfred"],["dc.contributor.author","Roth, Siegfried"],["dc.contributor.author","Wimmer, Ernst A."],["dc.contributor.author","Schoppmeier, Michael"],["dc.contributor.author","Klingler, Martin"],["dc.contributor.author","Bucher, Gregor"],["dc.date.accessioned","2018-11-07T09:55:00Z"],["dc.date.available","2018-11-07T09:55:00Z"],["dc.date.issued","2015"],["dc.description.abstract","Genetic screens are powerful tools to identify the genes required for a given biological process. However, for technical reasons, comprehensive screens have been restricted to very few model organisms. Therefore, although deep sequencing is revealing the genes of ever more insect species, the functional studies predominantly focus on candidate genes previously identified in Drosophila, which is biasing research towards conserved gene functions. RNAi screens in other organisms promise to reduce this bias. Here we present the results of the iBeetle screen, a large-scale, unbiased RNAi screen in the red flour beetle, Tribolium castaneum, which identifies gene functions in embryonic and postembryonic development, physiology and cell biology. The utility of Tribolium as a screening platform is demonstrated by the identification of genes involved in insect epithelial adhesion. This work transcends the restrictions of the candidate gene approach and opens fields of research not accessible in Drosophila."],["dc.description.sponsorship","Open-Access Publikationsfonds 2015"],["dc.identifier.doi","10.1038/ncomms8822"],["dc.identifier.isi","000358860900002"],["dc.identifier.pmid","26215380"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12460"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36659"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","2041-1723"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","The iBeetle large-scale RNAi screen reveals gene functions for insect development and physiology"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","73"],["dc.bibliographiccitation.journal","BMC Biology"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Trauner, Jochen"],["dc.contributor.author","Schinko, Johannes"],["dc.contributor.author","Lorenzen, Marce D."],["dc.contributor.author","Shippy, Teresa D."],["dc.contributor.author","Wimmer, Ernst A."],["dc.contributor.author","Beeman, Richard W."],["dc.contributor.author","Klingler, Martin"],["dc.contributor.author","Bucher, Gregor"],["dc.contributor.author","Brown, Susan J."],["dc.date.accessioned","2018-11-07T11:22:11Z"],["dc.date.available","2018-11-07T11:22:11Z"],["dc.date.issued","2009"],["dc.description.abstract","Background: Given its sequenced genome and efficient systemic RNA interference response, the red flour beetle Tribolium castaneum is a model organism well suited for reverse genetics. Even so, there is a pressing need for forward genetic analysis to escape the bias inherent in candidate gene approaches. Results: To produce easy-to-maintain insertional mutations and to obtain fluorescent marker lines to aid phenotypic analysis, we undertook a large-scale transposon mutagenesis screen. In this screen, we produced more than 6,500 new piggyBac insertions. Of these, 421 proved to be recessive lethal, 75 were semi-lethal, and eight indicated recessive sterility, while 505 showed new enhancer-trap patterns. Insertion junctions were determined for 403 lines and often appeared to be located within transcription units. Insertion sites appeared to be randomly distributed throughout the genome, with the exception of a preference for reinsertion near the donor site. Conclusion: A large collection of enhancer-trap and embryonic lethal beetle lines has been made available to the research community and will foster investigations into diverse fields of insect biology, pest control, and evolution. Because the genetic elements used in this screen are species-nonspecific, and because the crossing scheme does not depend on balancer chromosomes, the methods presented herein should be broadly applicable for many insect species."],["dc.identifier.doi","10.1186/1741-7007-7-73"],["dc.identifier.fs","568930"],["dc.identifier.isi","000272336000001"],["dc.identifier.pmid","19891766"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5844"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55941"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Biomed Central Ltd"],["dc.relation.issn","1741-7007"],["dc.rights","CC BY 2.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.subject.ddc","570"],["dc.subject.mesh","Animals"],["dc.subject.mesh","Chromosome Mapping"],["dc.subject.mesh","Crosses, Genetic"],["dc.subject.mesh","DNA Transposable Elements"],["dc.subject.mesh","Embryo Loss"],["dc.subject.mesh","Embryo, Nonmammalian"],["dc.subject.mesh","Enhancer Elements, Genetic"],["dc.subject.mesh","Genes, Lethal"],["dc.subject.mesh","Genetic Markers"],["dc.subject.mesh","Germ-Line Mutation"],["dc.subject.mesh","Mutagenesis, Insertional"],["dc.subject.mesh","Transposases"],["dc.subject.mesh","Tribolium"],["dc.title","Large-scale insertional mutagenesis of a coleopteran stored grain pest, the red flour beetle Tribolium castaneum, identifies embryonic lethal mutations and enhancer traps"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","53"],["dc.bibliographiccitation.journal","BMC Developmental Biology"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Schinko, Johannes B."],["dc.contributor.author","Weber, Markus"],["dc.contributor.author","Viktorinova, Ivana"],["dc.contributor.author","Kiupakis, Alexandros"],["dc.contributor.author","Averof, Michalis"],["dc.contributor.author","Klingler, Martin"],["dc.contributor.author","Wimmer, Ernst A."],["dc.contributor.author","Bucher, Gregor"],["dc.date.accessioned","2018-11-07T08:43:11Z"],["dc.date.available","2018-11-07T08:43:11Z"],["dc.date.issued","2010"],["dc.description.abstract","Background: The red flour beetle Tribolium castaneum has developed into an insect model system second only to Drosophila. Moreover, as a coleopteran it represents the most species-rich metazoan taxon which also includes many pest species. The genetic toolbox for Tribolium research has expanded in the past years but spatio-temporally controlled misexpression of genes has not been possible so far. Results: Here we report the establishment of the GAL4/UAS binary expression system in Tribolium castaneum. Both GAL4 Delta. and GAL4VP16 driven by the endogenous heat shock inducible promoter of the Tribolium hsp68 gene are efficient in activating reporter gene expression under the control of the Upstream Activating Sequence (UAS). UAS driven ubiquitous tGFP fluorescence was observed in embryos within four hours after activation while in-situ hybridization against tGFP revealed expression already after two hours. The response is quick in relation to the duration of embryonic development in Tribolium - 72 hours with segmentation being completed after 24 hours - which makes the study of early embryonic processes possible using this system. By comparing the efficiency of constructs based on Tribolium, Drosophila, and artificial core promoters, respectively, we find that the use of endogenous core promoters is essential for high-level expression of transgenic constructs. Conclusions: With the established GAL4/UAS binary expression system, ectopic misexpression approaches are now feasible in Tribolium. Our results support the contention that high-level transgene expression usually requires endogenous regulatory sequences, including endogenous core promoters in Tribolium and probably also other model systems."],["dc.identifier.doi","10.1186/1471-213X-10-53"],["dc.identifier.isi","000279816900001"],["dc.identifier.pmid","20482875"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5677"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19899"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Biomed Central Ltd"],["dc.relation.issn","1471-213X"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","Functionality of the GAL4/UAS system in Tribolium requires the use of endogenous core promoters"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]