title: Dehydration of the off-flavor chemical 2-methylisoborneol by the R-limonene-degrading bacteria Pseudomonas sp. strain 19-rlim and Sphingomonas sp. strain BIR2-rlima.
abstract: The terpene 2-methylisoborneol (MIB), a major cause of off-flavor in farm-raised catfish and drinking water, is transformed by various different terpene-degrading bacteria. Two of these, the R-limonene-degrading strains Pseudomonas sp. 19-rlim and Sphingomonas sp. BIR2-rlima, dehydrated MIB with the formation of odorless metabolites 2-methylenebornane and 4-methylcamphene. These metabolites which have a structural resemblance to camphor, could be further transformed by camphor-degrading bacteria to more oxidized products. The bacterial dehydrations demonstrated here may have application in removing MIB where it is a problem.
authors.affiliation: Southern Regional Research Center, Agricultural Research Service, U. S. Department of Agriculture, New Orleans, LA 70124, USA. r.eaton@cox.net
authors.forename: Richard W
authors.initials: RW
authors.lastname: Eaton
mesh_terms: D000143:Acids; D001673:Biodegradation, Environmental / Q000187:drug effects; D001711:Biotransformation / Q000187:drug effects; D001892:Camphanes / Q000737:chemistry / Q000378:metabolism*; D002164:Camphor / Q000494:pharmacology; D002384:Catalysis / Q000187:drug effects; D053138:Cyclohexenes / Q000737:chemistry / Q000378:metabolism*; D000077222:Limonene; D013058:Mass Spectrometry; D009812:Odorants / Q000032:analysis*; D010084:Oxidation-Reduction / Q000187:drug effects; D011549:Pseudomonas / Q000187:drug effects / Q000378:metabolism*; D020578:Sphingomonas / Q000187:drug effects / Q000378:metabolism*; D013729:Terpenes / Q000737:chemistry / Q000378:metabolism*
chemical_list: D000143:Acids; D001892:Camphanes; D053138:Cyclohexenes; D013729:Terpenes; C005536:2-methylisoborneol; D002164:Camphor; D000077222:Limonene