Effects of different culture media and oxygen upon lipids ofEscherichia coli K‐12

Abstract

The effects of altering the chemical composition of the culture media and the oxygen content of the environment upon the lipid metabolism ofEscherichia coli K‐12 were investigated. WhenE. coli cells were grown on the same culture medium but under aerobic and anaerobic conditions, an increase in the free fatty acids of anaerobically grown cells was observed with a disproportionate increase in the unsaturated fatty acids. When glucose was the sole carbon source, both fatty alcohols and hydrocarbons were detected as component lipids of these cells, whether growth occurred under aerobic or anaerobic conditions. Based upon this observation, acetate is considered the initial precursor for fatty alcohol and hydrocarbon biosynthesis. A possible metabolic pathway involving fatty alcohols in hydrocarbon synthesis has been postulated.

Occurrence and distribution of glycerol dialkyl glycerol tetraethers in a French peat bog

“…In addition, oxygen content might also have an impact on bacterial GDGT distribution. Altering the oxygen content of microorganism growth environment was shown to affect the cellular lipid composition of the bacteria Escherichia coli K-12 (Naccarato et al, 1974) …”

Microbial‐based motor fuels: science and technology

“…Terrestrial microorganisms also produce alkanes other than methane (Jankowski and Zobell, 1948; Davis, 1968; Jones, 1969; Naccarato et al. , 1974).…”

Caracterização geoquímica orgânica em sedimentos presentes nos Pockmarks e Diápiros do talude sul do Brasil

“…Na maioria das amostras, os n-alcanos de cadeia curta apresentaram o predomínio do n-C14, e a ordem de concentração decrescente dos n-alcanos foi n-C16 > n-C22, enquanto que o n-C31 predominou entre os n-alcanos de cadeia longa de maior massa molecular, seguida dos n-alcanos n-C33 > n-C29 (Figura 19). produzam n-alcanos pares entre n-C12 a n-C22 (DAVIS, 1968;JONES, 1969;JONES & YOUNG, 1970;NACCARATO et al, 1974, HAN et al, 1980GRIMALT et al, 1985GRIMALT et al, , 1986NISHIMURA & BAKER, 1986;GRIMALT & ALBAIGÉS, 1987;EKPO et al, 2005). Essa distribuição também foi encontrada em sedimentos oxigenados (GRIMALT et al, 1985).…”