Isolation of Cutibacterium acnes AP1, a rumen bacterium that forms trans-10,cis-12-conjugated linoleic acid
Year: 2024
Type: article
Abstract: Some microbes in the rumen form trans- 10, cis- 12 ( t 10, c 12)-conjugated linoleic acid (CLA), a fatty acid that depresses synthesis of milk fat in dairy cattle and other lactating animals. Despite their importance to milk fat depression, the microbes responsible have been difficult to identify, and no laboratory strain is currently available for study. Here we describe the isolation of Cutibacterium acnes AP1, a bacterium that forms t 10, c 12-CLA at fast rates. It was isolated from rumen contents of a heifer by using medium containing lactate and metronidazole. It formed t 10, c 12-CLA from linoleic acid, a result confirmed by a combination of 3 methods (spectrophotometry, thin-layer chromatography, and GC). The initial rate of formation was 67% faster than for Cutibacterium acnes DSM 1897, the type strain from human skin. The availability of this isolate and its ability to rapidly form t 10, c 12-CLA make it a good subject for further study. Such study could help control formation of t 10, c 12-CLA in the rumen and alleviate milk fat depression in milk cows.
Source: JDS Communications
Institution: University of California, Davis
Language: English
Subfield: Agronomy and Crop Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $1,310
Award: G5095417737
OpenAlex ID: W4401631771