title: A new approach for molecular cloning in cyanobacteria: cloning of an Anacystis nidulans met gene using a Tn901-induced mutant.
abstract: A new strategy for molecular cloning in the cyanobacterium Anacystis nidulans R-2 is described. This strategy involved the use of a transposon and was developed for the cloning of a gene encoding methionine biosynthesis. A met::Tn901 mutant was isolated. Chromosomal DNA fragments were cloned in the Escherichia coli plasmid vector pACYC184. A recombinant plasmid carrying the inactivated met::Tn901 gene was selected after transformation to E. coli. The cloned met::Tn901 DNA fragment was used as a probe to select the corresponding A. nidulans R-2 wild-type met gene from a gene library prepared in E. coli, using the newly constructed shuttle cosmid vector pPUC29. When transformed into A. nidulans Met- mutants, this cloned gene allowed the mutants to grow prototrophically.
mesh_terms: D003001:Cloning, Molecular; D000458:Cyanobacteria / Q000235:genetics*; D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000235:genetics; D005796:Genes; D005822:Genetic Vectors; D008715:Methionine / Q000235:genetics; D009154:Mutation; D010957:Plasmids
chemical_list: D004251:DNA Transposable Elements; D008715:Methionine