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. 1985 Apr;162(1):162–169. doi: 10.1128/jb.162.1.162-169.1985

Growth of Acinetobacter sp. strain HO1-N on n-hexadecanol: physiological and ultrastructural characteristics.

M E Singer, S M Tyler, W R Finnerty
PMCID: PMC218969  PMID: 2984172

Abstract

The growth of Acinetobacter sp. strain HO1-N on hexadecanol results in the formation of intracytoplasmic membranes and intracellular rectangular inclusions containing one of the end products of hexadecanol metabolism, hexadecyl palmitate. The intracellular inclusions were purified and characterized as "wax ester inclusions" consisting of 85.6% hexadecyl palmitate, 4.8% hexadecanol, and 9.6% phospholipid, with a phospholipid-to-protein ratio of 0.42 mumol of lipid phosphate per mg of inclusion protein. The cellular lipids consisted of 69.8% hexadecyl palmitate, 22.8% phospholipid, 1.9% triglyceride, 4.7% mono- and diglyceride, 0.1% free fatty acid, and 0.8% hexadecanol, as compared with 98% hexadecyl palmitate and 1.9% triglyceride, which comprised the extracellular lipids. Cell-associated hexadecanol represented 0.05% of the exogenously supplied hexadecanol, with hexadecyl palmitate accounting for 14.7% of the total cellular dry weight. Acinetobacter sp. strain HO1-N possesses a mechanism for the intracellular packaging of hexadecyl palmitate in wax ester inclusions, which differ in structure and chemical composition from "hydrocarbon inclusions" isolated from hexadecane-grown cells.

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Selected References

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