Validation of a Tn5 transposon mutagenesis system for Gluconacetobacter diazotrophicus through characterization of a flagellar mutant

Gluconacetobacter diazotrophicus is a nitrogen-fixing bacterium, which was originally isolated from the interior of sugarcane plants. The genome of strain PAL5 of G. diazotrophicus has been completely sequenced and a next step is the functional characterization of its genes. The aim of this study wa...

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Veröffentlicht in:Archives of microbiology 2008-04, Vol.189 (4), p.397-405
Hauptverfasser: Rouws, Luc F. M, Simões-Araújo, Jean L, Hemerly, Adriana S, Baldani, José I
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Hemerly, Adriana S
Baldani, José I
description Gluconacetobacter diazotrophicus is a nitrogen-fixing bacterium, which was originally isolated from the interior of sugarcane plants. The genome of strain PAL5 of G. diazotrophicus has been completely sequenced and a next step is the functional characterization of its genes. The aim of this study was to establish an efficient mutagenesis method, using the commercial Tn5 transposon EZ::Tn5[trade mark sign]Tnp Transposome[trade mark sign] (Epicentre). Up to 1 x 10⁶ mutants per microgram of transposome were generated in a single electroporation experiment. Insertion-site flanking sequences were amplified by inverse PCR and sequenced for 31 mutants. For ten of these mutants, both insertion flanks could be identified, confirming the 9 bp duplication that is typical for Tn5 transposition. Insertions occurred in a random fashion and were genetically stable for at least 50 generations. One mutant had an insertion in a homolog of the flagellar gene flgA, and was therefore predicted to be affected in flagella-dependent traits and used to validate the applied mutagenesis methodology. This mutant lacked flagella and was non-motile on soft agar. Interestingly, it was also strongly affected in the ability to form biofilm on glass wool.
doi_str_mv 10.1007/s00203-007-0330-x
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subjects Acetobacteraceae - genetics
Acetobacteraceae - physiology
Bacteria
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Bacteriology
Biochemistry
Biofilms
Biofilms - growth & development
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Cell Biology
Chromosomes, Bacterial - genetics
DNA Transposable Elements
Ecology
Electroporation
Flagella - genetics
Flagella - metabolism
Fundamental and applied biological sciences. Psychology
Genes
Genomes
Gluconacetobacter diazotrophicus
Life Sciences
Microbial Ecology
Microbiology
Miscellaneous
Molecular Sequence Data
Motility
Mutagenesis
Mutagenesis, Insertional
Mutants
Nitrogen
Nitrogen fixation
Original Paper
Phenotype
Plant growth
Polymerase Chain Reaction
Sugarcane
title Validation of a Tn5 transposon mutagenesis system for Gluconacetobacter diazotrophicus through characterization of a flagellar mutant
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