Mg-SINE: A short interspersed nuclear element from the rice blast fungus, Magnaporthe grisea

Pradeep Kachroo, Sally A. Leong, Bharat B. Chattoo

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A short interspersed nuclear element, Mg-SINE, was isolated and characterized from the genome of the rice blast fungus, Magnaporthe grisea. Mg-SINE was isolated as an insertion element within Pot2, an inverted-repeat transposon from M. grisea and shows typical features of a mammalian SINE. Mg- SINE is present as a 0.47-kb interspersed sequence at ≃ 100 copies per haploid genome in both rice and non-rice isolates of M. grisea, indicating a common evolutionary origin. Secondary structure analysis of Mg-SINE revealed a tRNA-related region at the 5' end which folds into a cloverleaf structure. Genomic fusions resulting in chimeric Mg-SINEs (Ch-SINEs) composed of a sequence homologous to Mg-SINE at the 3' end and an unrelated sequence at its 5' end were also isolated, indicating that this and other DNA rearrangements mediated by these elements may have a major effect on the genomic architecture of this fungus.

Original languageEnglish
Pages (from-to)11125-11129
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number24
StatePublished - Nov 21 1995


  • repeated DNA
  • transposon

ASJC Scopus subject areas

  • General


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