Genome-Wide Investigation of Biofilm Formation in Bacillus cereus
is a soil-dwelling Gram-positive bacterium capable of forming structured multicellular communities, or biofilms. However, the regulatory pathways controlling biofilm formation are less well understood in In this work, we developed a method to study biofilms formed at the air-liquid interface. We app...
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Veröffentlicht in: | Applied and environmental microbiology 2017-07, Vol.83 (13) |
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Sprache: | eng |
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Zusammenfassung: | is a soil-dwelling Gram-positive bacterium capable of forming structured multicellular communities, or biofilms. However, the regulatory pathways controlling biofilm formation are less well understood in
In this work, we developed a method to study
biofilms formed at the air-liquid interface. We applied two genome-wide approaches, random transposon insertion mutagenesis to identify genes that are potentially important for biofilm formation, and transcriptome analyses by RNA sequencing (RNA-seq) to characterize genes that are differentially expressed in
when cells were grown in a biofilm-inducing medium. For the first approach, we identified 23 genes whose disruption by transposon insertion led to altered biofilm phenotypes. Based on the predicted function, they included genes involved in processes such as nucleotide biosynthesis, iron salvage, and antibiotic production, as well as genes encoding an ATP-dependent protease and transcription regulators. Transcriptome analyses identified about 500 genes that were differentially expressed in cells grown under biofilm-inducing conditions. One particular set of those genes may contribute to major metabolic shifts, leading to elevated production of small volatile molecules. Selected volatile molecules were shown to stimulate robust biofilm formation in
Our studies represent a genome-wide investigation of
biofilm formation.
In this work, we established a robust method for
biofilm studies and applied two genome-wide approaches, transposon insertion mutagenesis and transcriptome analyses by RNA-seq, to identify genes and pathways that are potentially important for biofilm formation in
We discovered dozens of genes and two major metabolic shifts that seem to be important for biofilm formation in
Our study represents a genome-wide investigation on
biofilm formation. |
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ISSN: | 0099-2240 1098-5336 |
DOI: | 10.1128/AEM.00561-17 |