Bacterial Metabolism
Bacterial Infections

Author: Gianpiero Pescarmona
Date: 17/05/2007


Metabolism of Prokaryotes

Aerobes obtain most of their energy from respiration = oxidation of food by O2 (the mechanism is the same of mitochondrial respiration)

Carbon source + O2 —> CO2 + H2O

Se l'accettore finale è diverso (carbonato, solfato, nitrato) allora la respirazione è ANAEROBIA

Anaerobes obtain energy from "fermentation": = degradation of organic fuel to get energy without net oxidation of fuel, instead via electron transfer to compounds other than O2

  1. Glycolysis (pyruvate)
  2. Hexose Monophosphate Shunt (lactate or ethanol)
  3. Entner-Doudoroff (ethanol)

Pyruvate can be further metabolized to

  1. lactic acid
  2. ethanol
  3. propionic acid
  4. butirric acid
  5. mixed (lactic, acetic, formic etc), H2 e CO2

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