Abstract:
cDNA encoding (-)-limonene-6-hydroxylase from spearmint and (-)-limonene-3-hydroxylase from peppermint have been isolated and sequenced, and the corresponding amino acid sequences have been determined. Accordingly, isolated DNA sequences are provided which code for the expression of (-)-limonene-6-hydroxylase from spearmint (SEQ ID No:1, from Mentha spicata) and (-)-limonene-3-hydroxylase from peppermint (SEQ ID No:3 and SEQ ID No:5, from Mentha piperita). In other aspects, replicable recombinant cloning vehicles are provided which code for limonene hydroxylase or for a base sequence sufficiently complementary to at least a portion of the limonene hydroxylase DNA or RNA to enable hybridization therewith (e. g. , antisense limonene hydroxylase RNA or fragments of complementary limonene hydroxylase DNA which are useful as polymerase chain reaction primers or as probes for limonene hydroxylase or related genes). In yet other aspects, modified host cells are provided that have been transformed, transfected, infected and/or injected with a recombinant cloning vehicle and/or DNA sequence encoding limonene hydroxylase.