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Insertion sequence-excision enhancer removes transposable elements from bacterial genomes and induces various genomic deletions
Insertion sequences are transposable elements that are found in the genomes of many bacteria. Here, the authors identify an enhancer element that results in a high frequency of excision of insertion elements, and suggest that the excision enhancer element coevolved with the insertion sequences.
- Masahiro Kusumoto
- , Tadasuke Ooka
- & Tetsuya Hayashi
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Article
| Open Access
Herpesviruses carrying a Brainbow cassette reveal replication and expression of limited numbers of incoming genomes
The replication of viral genomes in infected cells is required for successful infection. In this study, using Cre-conditional expression of multiple coloured fluorophores, the authors demonstrate that the number of viral genomes expressed and replicated in a cell is surprisingly limited.
- Oren Kobiler
- , Yaron Lipman
- & Lynn W. Enquist
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Article
| Open Access
The complete sequence of the smallest known nuclear genome from the microsporidian Encephalitozoon intestinalis
A comparison of related genomes provides valuable information about how they evolve. Here, the complete sequence of the smallest known nuclear genome from the microsporidiaE. intestinalis is described and compared with its larger sister E. cuniculi, revealing what parts are indispensable in even the most reduced genomes.
- Nicolas Corradi
- , Jean-François Pombert
- & Patrick J. Keeling
Tumour microvesicles contain retrotransposon elements and amplified oncogene sequences