title: Two novel iso-branched octadecenoic acids from a Micrococcus species.
abstract: The novel fatty acids 16-methyl-6(Z)-heptadecenoic acid and 16-methyl-8(Z)-heptadecenoic acid were identified for the first time in nature in a species of the bacterium Micrococcus isolated from Lake Pomorie in Bulgaria. The principal fatty acids in this bacterium were a series of iso-anteiso fatty acids with chain lengths between C(14) and C(24), while the most interesting series of monounsaturated fatty acids was a family of Delta(6) fatty acids with chain lengths between C(14) and C(17). The novel compounds were characterized using a combination of GC-MS and chemical transformations, such as dimethyl disulfide derivatization and catalytic hydrogenation. The results established for the first time a bacterial origin for some of these Delta(6) fatty acids.
authors.affiliation: Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, Puerto Rico 00931, USA. ncarball@upracd.upr.clu.edu
authors.forename: N M
authors.initials: NM
authors.lastname: Carballeira
authors.forename: M
authors.initials: M
authors.lastname: Pagán
authors.forename: F
authors.initials: F
authors.lastname: Shalabi
authors.forename: J T
authors.initials: JT
authors.lastname: Nechev
authors.forename: K
authors.initials: K
authors.lastname: Lahtchev
authors.forename: A
authors.initials: A
authors.lastname: Ivanova
authors.forename: K
authors.initials: K
authors.lastname: Stefanov
mesh_terms: D005229:Fatty Acids, Monounsaturated / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D008837:Micrococcus / Q000737:chemistry* / Q000378:metabolism; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D014871:Water Microbiology
chemical_list: C420902:16-methyl-6-heptadecenoic acid; C420903:16-methyl-8-heptadecenoic acid; D005229:Fatty Acids, Monounsaturated