Biosynthesis of trans Fatty Acids in a Fungus, Cladosporium sphaerospermum, and Some Bacteria Isolated from Fish Viscera

Abstract

Many microorganisms isolated from fish viscera formed trans fatty acids. One of them was identified as Cladosporium sphaerospermum. This is the first report of a fungus forming trans fatty acids. Several bacteria, identified as Pseudomonas sp., Pseudomonas putida, Marinomonas sp., and Schewanella putrefaciens, also formed trans-octadecenoic acids, which increased on growth at high temperature or with phenol. The trans-octadecenoic acids comprised a mixture of various double bond-positional isomers, such as Δ8, Δ9, Δ10, Δ11, and Δ12.