Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/85750
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dc.contributor.authorKelly, J.en
dc.contributor.authorHynes, M.en
dc.date.issued1987en
dc.identifier.citationCurrent Genetics, 1987; 12(1):21-31en
dc.identifier.issn0172-8083en
dc.identifier.issn1432-0983en
dc.identifier.urihttp://hdl.handle.net/2440/85750-
dc.description.abstractIt has been established that a plasmid containing the amdS gene of Aspergillus nidulans may be used to transform amdS+ strains by selecting for increased utilization of acetamide as sole nitrogen source. Analysis of transformants has shown that multiple tandem copies of the plasmid can be integrated into the chromosome, commonly at sites other than the amdS locus. While the transformed phenotype was relatively stable through mitotic and meiotic divisions evidence was found for variation in plasmid copy number presumably due to unequal recombination events. Expression of the integrated amdS genes was related to copy number, and the amdS RNA produced was similar in size to wild-type RNA. Evidence for titration of the product of the regulatory gene amdR by multiple copies of amdS was found. No titration of the product of the areA gene was observed, and amdS expression was still dependent on areA function. Multiple copies of the amdI9 mutation resulted in poor growth on acetate. This was not observed in the case of the amdS+ gene. The cis-acting amdI9 mutation causes increased facB dependent acetate induction of amdS expression. Titration of the facB gene produce by amdI9 DNA, but not by amdS+ DNA, therefore suggested that the mutation results in increased affinity for the facB gene product.en
dc.description.statementofresponsibilityJoan M. Kelly and M. J. Hynesen
dc.language.isoenen
dc.publisherSpringer-Verlagen
dc.rights© Springer-Verlag 1987en
dc.subjectAspergillus nidulans; Transformation; Gene regulation; Acetamidaseen
dc.titleMultiple copies of the amdS gene of Aspergillus nidulans cause titration of trans-acting regulatory proteinsen
dc.typeJournal articleen
dc.identifier.rmid0030008825en
dc.identifier.doi10.1007/BF00420723en
dc.identifier.pubid107469-
pubs.library.collectionGenetics publicationsen
pubs.library.teamDS02en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
Appears in Collections:Genetics publications

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