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• W2001944522 endingPage "149" @default.
• W2001944522 startingPage "135" @default.
• W2001944522 abstract "We have tested the impact of tags on the structure and function of indirect flight muscle (IFM)-specific Act88F actin by transforming mutant Drosophila melanogaster, which do not express endogenous actin in their IFMs, with tagged Act88F constructs. Epitope tagging is often the method of choice to monitor the fate of a protein when a specific antibody is not available. Studies addressing the functional significance of the closely related actin isoforms rely almost exclusively on tagged exogenous actin, because only few antibodies exist that can discriminate between isoforms. Thereby it is widely presumed that the tag does not significantly interfere with protein function. However, in most studies the tagged actin is expressed in a background of endogenous actin and, as a rule, represents only a minor fraction of the total actin. The Act88F gene encodes the only Drosophila actin isoform exclusively expressed in the highly ordered IFM. Null mutations in this gene do not affect viability, but phenotypic effects in transformants can be directly attributed to the transgene. Transgenic flies that express Act88F with either a 6x histidine tag or an 11-residue peptide derived from vesicular stomatitis virus G protein at the C terminus were flightless. Overall, the ultrastructure of the IFM resembled that of the Act88F null mutant, and only low amounts of C-terminally tagged actins were found. In contrast, expression of N-terminally tagged Act88F at amounts comparable with that of wild-type flies yielded fairly normal-looking myofibrils and partially reconstituted flight ability in the transformants. Our findings suggest that the N terminus of actin is less sensitive to modifications than the C terminus, because it can be tagged and still polymerize into functional thin filaments." @default.
• W2001944522 created "2016-06-24" @default.
• W2001944522 creator A5022605246 @default.
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• W2001944522 date "1999-01-01" @default.
• W2001944522 modified "2023-09-27" @default.
• W2001944522 title "Differential Epitope Tagging of Actin in TransformedDrosophila Produces Distinct Effects on Myofibril Assembly and Function of the Indirect Flight Muscle" @default.
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• W2001944522 doi "https://doi.org/10.1091/mbc.10.1.135" @default.
• W2001944522 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/25159" @default.
• W2001944522 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9880332" @default.
• W2001944522 hasPublicationYear "1999" @default.
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