sentence: The lactonase gene aac from R. solanacearum GMI1000 is considerably similar to that of the AHL-acylase from Ralstonia sp. XJ12B , with an 83 % identity match and shared 39 % identity with an aculeacin A acylase precursor from the gram-positive actinomycete Actinoplanes utahensis in the amino acid sequence [ 38 ] .