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Boto, a class II transposon in Moniliophthora perniciosa, is the first representative of the PIF/Harbinger superfamily in a phytopathogenic fungus

2012; Microbiology Society; Volume: 159; Issue: Pt_1 Linguagem: Inglês

10.1099/mic.0.062901-0

1465-2080

Jorge Fernando Pereira, Ana Paula Morais Martins Almeida, Júnio Cota, João Alencar Pamphile, Gilvan Ferreira da Silva, Elza Fernandes de Araújo, Karina Peres Gramacho, Sérgio Hermínio Brommonschenkel, Gonçalo Amarante Guimarães Pereira, Marisa Vieira de Queiroz,

Plant-Microbe Interactions and Immunity

Boto, a class II transposable element, was characterized in the Moniliophthora perniciosa genome. The Boto transposase is highly similar to plant PIF-like transposases that belong to the newest class II superfamily known as PIF/Harbinger. Although Boto shares characteristics with PIF-like elements, other characteristics, such as the transposase intron position, the position and direction of the second ORF, and the footprint, indicate that Boto belongs to a novel family of the PIF/Harbinger superfamily. Southern blot analyses detected 6-12 copies of Boto in C-biotype isolates and a ubiquitous presence among the C- and S-biotypes, as well as a separation in the C-biotype isolates from Bahia State in Brazil in at least two genotypic groups, and a new insertion in the genome of a C-biotype isolate maintained in the laboratory for 6 years. In addition to PCR amplification from a specific insertion site, changes in the Boto hybridization profile after the M. perniciosa sexual cycle and detection of Boto transcripts gave further evidence of Boto activity. As an active family in the genome of M. perniciosa, Boto elements may contribute to genetic variability in this homothallic fungus. This is the first report of a PIF/Harbinger transposon in the genome of a phytopathogenic fungus.