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Genome Sequence of the Fungus Nannizziopsis barbatae, an Emerging Reptile Pathogen.

ABSTRACT: Nannizziopsis barbatae is an emerging fungal pathogen capable of causing contagious dermatomycosis in reptiles. Here, we report a 31.54-Mb draft genome sequence of an isolate originating from an infected eastern water dragon in Brisbane, Australia.

SUBMITTER: Powell D

PROVIDER: S-EPMC8407711 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Genome Sequence of the Fungus Nannizziopsis barbatae, an Emerging Reptile Pathogen.

Powell Daniel D Jones Ashley A Jackson Nicola N Kaur Parwinder P Bar Ido I Schwessinger Benjamin B Frère Céline H CH

Microbiology resource announcements 20210107 1

<i>Nannizziopsis barbatae</i> is an emerging fungal pathogen capable of causing contagious dermatomycosis in reptiles. Here, we report a 31.54-Mb draft genome sequence of an isolate originating from an infected eastern water dragon in Brisbane, Australia. ...[more]

PMID: 33414335

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Project description:BackgroundUsing a combination of pyrosequencing and conventional Sanger sequencing, the complete genome sequence of the recently described novel Brucella species, Brucella microti, was determined. B. microti is a member of the genus Brucella within the Alphaproteobacteria, which consists of medically important highly pathogenic facultative intracellular bacteria. In contrast to all other Brucella species, B. microti is a fast growing and biochemically very active microorganism with a phenotype more similar to that of Ochrobactrum, a facultative human pathogen. The atypical phenotype of B. microti prompted us to look for genomic differences compared to other Brucella species and to look for similarities with Ochrobactrum.ResultsThe genome is composed of two circular chromosomes of 2,117,050 and 1,220,319 base pairs. Unexpectedly, we found that the genome sequence of B. microti is almost identical to that of Brucella suis 1330 with an overall sequence identity of 99.84% in aligned regions. The most significant structural difference between the two genomes is a bacteriophage-related 11,742 base pairs insert only present in B. microti. However, this insert is unlikely to have any phenotypical consequence. Only four protein coding genes are shared between B. microti and Ochrobactrum anthropi but impaired in other sequenced Brucella. The most noticeable difference between B. microti and other Brucella species was found in the sequence of the 23S ribosomal RNA gene. This unusual variation could have pleiotropic effects and explain the fast growth of B. microti.ConclusionContrary to expectations from the phenotypic analysis, the genome sequence of B. microti is highly similar to that of known Brucella species, and is remotely related to the one of O. anthropi. How the few differences in gene content between B. microti and B. suis 1330 could result in vastly different phenotypes remains to be elucidated. This unexpected finding will complicate the task of identifying virulence determinants in the Brucella genus. The genome sequence of B. microti will serve as a model for differential expression analysis and complementation studies. Our results also raise some concerns about the importance given to phenotypical traits in the definition of bacterial species.

Dataset Information

Genome Sequence of the Fungus Nannizziopsis barbatae, an Emerging Reptile Pathogen.

Publications

Genome Sequence of the Fungus Nannizziopsis barbatae, an Emerging Reptile Pathogen.

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