Abstract
A transposable element from a coryneform bacterium, Corynebacterium glutamicum ATCC 31831 was isolated and characterized. The element IS31831 is a 1453 bp insertion sequence with 24 bp imperfect terminal inverted repeats. It contains one open reading frame highly homologous at the amino acid level to the transposase of IS1096 from Mycobacterium smegmatis. Both IS31831 and IS1096 exhibit several common characteristics suggesting that they constitute a new family of insertion sequences. IS31831 was isolated by taking advantage of the sucrose sensitivity of coryneform bacteria conferred by expression of the Bacillus subtilis sacB gene. An Escherichia coli/Corynebacterium shuttle vector useful for the isolation of transposable elements from the coryneform group of bacteria was constructed.
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