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Production of eicosapentaenoic and arachidonic acids by an Antarctic bacterium-response to growth temperature


Nichols, DS and Brown, JL and Nichols, PD and McMeekin, TA, Production of eicosapentaenoic and arachidonic acids by an Antarctic bacterium-response to growth temperature, FEMS Microbiology Letters, 152, (2) pp. 349-354. ISSN 0378-1097 (1997) [Refereed Article]

DOI: doi:10.1016/S0378-1097(97)00224-3


A psychrophilic bacterium, designated strain 651, was isolated from Antarctic sea ice collected from Prydz Bay, Eastern Antarctica. The fatty acid composition of the strain was characteristic of the Flavobacterium- Cytophaga-Microscillia group. The bacterium also produced 12.2 2.6% eicosapentaenoic acid (20:5ω3) and 1.4 2.7% arachidonic acid (20:4ω6). To our knowledge this is the first report of a bacterium that contains elevated proportions of both fatty acids. The proportion of eicosapentaenoic acid responded to growth temperature in a linear manner over the temperature range 2-15°C while the percentage of arachidonic acid remained relatively unchanged. Eicosapentaenoic acid appears to modulate both lipid phase and fluidity in response to temperature within the cellular membrane of strain 651, while arachidonic acid does not appear to be involved in this response. Further study of the polyunsaturated fatty acid biosynthetic mechanisms of strain 651 may yield significant information regarding the relationship between prokaryotic and eukaryotic polyunsaturated fatty acid biosynthesis.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Bacteriology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Nichols, DS (Dr David Nichols)
UTAS Author:Brown, JL (Dr Janelle Brown)
UTAS Author:Nichols, PD (Dr Peter Nichols)
UTAS Author:McMeekin, TA (Professor Thomas McMeekin)
ID Code:10408
Year Published:1997
Web of Science® Times Cited:32
Deposited By:Agricultural Science
Deposited On:1997-08-01
Last Modified:2011-08-11

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