Polyamines Are Not Required for Aerobic Growth of Escherichia coli : Preparation of a Strain with Deletions in All of the Genes for Polyamine Biosynthesis
Year: 2009
Type: article
Abstract: A strain of Escherichia coli was constructed in which all of the genes involved in polyamine biosynthesis--speA (arginine decarboxylase), speB (agmatine ureohydrolase), speC (ornithine decarboxylase), spe D (adenosylmethionine decarboxylase), speE (spermidine synthase), speF (inducible ornithine decarboxylase), cadA (lysine decarboxylase), and ldcC (lysine decarboxylase)--had been deleted. Despite the complete absence of all of the polyamines, the strain grew indefinitely in air in amine-free medium, albeit at a slightly (ca. 40 to 50%) reduced growth rate. Even though this strain grew well in the absence of the amines in air, it was still sensitive to oxygen stress in the absence of added spermidine. In contrast to the ability to grow in air in the absence of polyamines, this strain, surprisingly, showed a requirement for polyamines for growth under strictly anaerobic conditions.
Source: Journal of Bacteriology
DOI: 10.1128/jb.00381-09
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
Funder: National Institutes of Health
OpenAlex ID: W2167320966