Journal
FUNGAL GENETICS AND BIOLOGY
Volume 42, Issue 6, Pages 546-553Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.fgb.2005.03.007
Keywords
Fusarium oxysporum; transposon; hAT family; genome dynamics; starvation
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The facultative pathogenic fungus Fusaritan oxysporum is known to harbour many different transposable and/or repetitive elements. We have identified Drifter, a novel DNA transposon of the hAT family in F oxysporum. It was found adjoining SIX1-H, a truncated homolog of the SIX1 avirulence gene in F. oxysporum f. sp. lycopersici. Absence of a target site duplication as well as the 5' part of SIX1-H suggests that transposition of Drifter into the ancestor of SIX1-H was followed by loss of a chromosomal segment through recombination between Drifters. F. oxysporum isolates belonging to variousforinae speciales harbour between 0 and 5 full-length copies of Drifter and/or one or more copies with an internal deletion. Transcription of Drifter is activated during starvation for carbon or nitrogen. (c) 2005 Elsevier Inc. All rights reserved.
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