Production of 10-Ketostearic Acid and 10-Hydroxystearic Acid by Strains of Sphingobacterium thalpophilum Isolated from Composted Manure |
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| Authors: | Tsung Min Kuo Alan C Lanser Larry K Nakamura Ching T Hou |
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| Institution: | (1) Oil Chemical Research, National Center for Agricultural Utilization Research, USDA-ARS, 1815 North University Street, Peoria, IL 61604, USA , US;(2) Microbial Properties Research, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, IL 61604, USA , US |
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| Abstract: | Six strains of Sphingobacterium thalpophilum were isolated from a compost mixture enriched with oleic acid. These strains converted oleic acid to 10-ketostearic acid
(10-KSA; 87–94% of the total conversion product) and to 10-hydroxystearic acid (10-HSA; 6–13%) exhibiting three levels of
total product yields. The predominant production of 10-KSA by these new S. thalpophilum isolates is in contrast to strain 142b (NRRL B-14797) previously isolated from a commercial compost, which produces exclusively
10-HSA. The production yield of greater than 75% 10-KSA was achieved in 36 h, acting on 0.26 g of oleic acid in 30-ml fermentation
broth incubated with agitation at 28°C. For easy maintenance, fast-growth, and high bioreactivity, these S. thalpophilum strains are suited for developing a large-scale production of 10-KSA and 10-HSA.
Received: 20 July 1999 / Accepted: 20 August 1999 |
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