Genomics of glycopeptidolipid biosynthesis in Mycobacterium abscessus and M. chelonae
Author Information
Author(s): Ripoll Fabienne, Deshayes Caroline, Pasek Sophie, Laval Françoise, Beretti Jean-Luc, Biet Franck, Risler Jean-Loup, Daffé Mamadou, Etienne Gilles, Gaillard Jean-Louis, Reyrat Jean-Marc
Primary Institution: Laboratoire de Microbiologie, Université de Versailles Saint-Quentin-en-Yvelines
Hypothesis
The compact organization of the GPL locus in M. smegmatis represents the ancestral form and that evolution has scattered various pieces throughout the genome in M. abscessus and M. chelonae.
Conclusion
Although these three species produce identical GPL molecules, the organization of GPL genes differs between them, thus constituting species-specific signatures.
Supporting Evidence
- The GPL locus appears to be split into several parts in M. chelonae and M. abscessus.
- All genes necessary for GPL biosynthesis are clustered in a single region of the M. smegmatis genome.
- Despite producing structurally identical GPL molecules, the genes necessary for its biosynthesis are organized very differently in the three species.
Takeaway
This study looks at how two types of bacteria, M. abscessus and M. chelonae, make a special type of fat called glycopeptidolipids. Even though they make the same kind of fat, the way their genes are organized is different.
Methodology
The complete genomes of M. chelonae and M. abscessus were sequenced, and comparative genomic analysis was performed to identify and analyze the genetic regions encoding enzymes involved in GPL biosynthesis.
Limitations
The study does not explore the regulatory mechanisms that may differ between the species.
Digital Object Identifier (DOI)
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