Evidence map›Paper›PMID 41361803›Full record

ArticleBMC microbiology2025

Complete genome and plasmid sequence, and chemotaxonomic analysis of Francisella sp. strain W12-1067, now designated as Allofrancisella heilbronnii.

Kristin Köppen, Kerstin Rydzewski, Klaus Heuner

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Article in BMC microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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3 authors.

Kristin KöppenWorking group: Cellular Interactions of Bacterial Pathogens, Centre for Biological Threats and Special Pathogens, Highly Pathogenic Microorganisms (ZBS 2), Robert Koch Institute, Seestraße 10, Berlin, 13353, Germany.
Kerstin RydzewskiWorking group: Cellular Interactions of Bacterial Pathogens, Centre for Biological Threats and Special Pathogens, Highly Pathogenic Microorganisms (ZBS 2), Robert Koch Institute, Seestraße 10, Berlin, 13353, Germany.
Klaus HeunerWorking group: Cellular Interactions of Bacterial Pathogens, Centre for Biological Threats and Special Pathogens, Highly Pathogenic Microorganisms (ZBS 2), Robert Koch Institute, Seestraße 10, Berlin, 13353, Germany. HeunerK@rki.de.

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6 · The paper itself

Abstract

backgroundThe zoonotic pathogen Francisella tularensis is the etiological agent of tularemia. Tularemia in humans is mainly caused by F. tularensis subspecies tularensis and holarctica, but beneath some opportunistic Francisella species, like F. novicida and F. philomiragia, further genera of the family Francisellaceae have been described, such as Allofrancisella, Parafrancisella and Pseudofrancisella. Less is known about these genera. In the presented study we describe a German Allofrancisella isolate which was originally described as Francisella sp. strain W12-1067.

resultsPhylogenetic analysis and chemotaxonomy revealed that Francisella sp. strain W12-1067 is a separate species of the genus Allofrancisella and therefore was named A. heilbronnii. A. heilbronnii shows several genotypic and phenotypic differences to other Allofrancisella species, in growth, LPS and fatty acid composition. The genome size is 1,706,635 bp. A plasmid (6,872 bp) was found within the genome of A. heilbronnii, which is designated as pFW12. It encodes six open reading frames including a replication initiation protein and an iglD (tssk). We showed that pFW12 is transferable and stable in other Francisallaceae species, such as F. tularensis ssp. holarctica, F. novicida and A. inopinata.

conclusionFrancisella sp. strain W12-1067 belongs to the genus Allofrancisella and now is designated as A. heilbronnii. In this work we present the annotated, complete genome and plasmid sequence. The genus Allofrancisella seems to be the only member of Francisellaceae which is negative for the genes of the major virulence island named Francisella pathogenicity island (FPI). A putative cryptic plasmid, pFW12, was found in A. heilbronnii, which is transferable and stable into other Francisallaceae species. Therefore, pFW12 could be used as a Francisellaceae-specific vector.

Indexed as

FrancisellaGenome, BacterialPlasmidsBase CompositionDNA, BacterialFatty AcidsHumansLipopolysaccharidesPhylogenySequence Analysis, DNAWhole Genome SequencingDNA, BacterialFatty AcidsLipopolysaccharidesAllofrancisella heilbronniiFrancisellaceaeGenome sequencePlasmidTularemiaW12-1067

Identifiers

PMID41361803
PMCPMC12701580

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