Microbial Metabolism Lecture 1 - Intro Why study bacterial metabolism ...
Microbial Metabolism Lecture 1 - Intro Why study bacterial metabolism? -
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Bacterial perspective o Bacterial growth requires energy o Metabolic processes yield energy and reducing power that are used for growth and survival o All bacteria rely on metabolic processes o Catabolism: the bacterial cell breaks down the energy source so that it can be used in anabolism o Anabolism: nutrients from the environment and energy are used to create the subunits needed for the synthesis of cellular structures Industrial perspective o Bacterial metabolism can be sued to create different foods o i.e. milk yoghurt or sour cream or cheese Our health and disease is determined by bacteria. Bacteria are found all through our body and help protect against other pathogenic microbes as well as our digestion Microbes can help plants grow o Fungi are found in and around roots, and bacteria are found in stems and on the root surface Environmental perspective o Important in the environmental cycling of various compounds i.e. carbon, nitrogen etc.
What is involved in metabolism? -
Need an energy source and a nutrient source. Energy allows the nutrients to be synthesised into cellular components
Nutrient Sources -
Inorganic carbon source (CO2): Autotroph Organic and inorganic carbon source: Mixotroph Organic Carbon source: Heterotroph
Electron sources -
Electrons donated from organic material: Organotroph Electrons donated from inorganic material e.g. H2S: Lithotroph
Energy Source -
Light: phototroph Chemical energy: Chemotroph o Organic Material: chemoorganotroph o Inorganic material: chemolithotroph
Summary of metabolism -
Energy source provides ATP, carbon source provides precursor metabolites and the electron source provides the reducing power These three things come together to form the monomers and other building blocks that are needed to create the macromolecules for cellular structures
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Bacterial perspective o Bacterial growth requires energy o Metabolic processes yield energy and reducing power that are used for growth and survival o All bacteria rely on metabolic processes o Catabolism: the bacterial cell breaks down the energy source so that it can be used in anabolism o Anabolism: nutrients from the environment and energy are used to create the subunits needed for the synthesis of cellular structures Industrial perspective o Bacterial metabolism can be sued to create different foods o i.e. milk yoghurt or sour cream or cheese Our health and disease is determined by bacteria. Bacteria are found all through our body and help protect against other pathogenic microbes as well as our digestion Microbes can help plants grow o Fungi are found in and around roots, and bacteria are found in stems and on the root surface Environmental perspective o Important in the environmental cycling of various compounds i.e. carbon, nitrogen etc.
What is involved in metabolism? -
Need an energy source and a nutrient source. Energy allows the nutrients to be synthesised into cellular components
Nutrient Sources -
Inorganic carbon source (CO2): Autotroph Organic and inorganic carbon source: Mixotroph Organic Carbon source: Heterotroph
Electron sources -
Electrons donated from organic material: Organotroph Electrons donated from inorganic material e.g. H2S: Lithotroph
Energy Source -
Light: phototroph Chemical energy: Chemotroph o Organic Material: chemoorganotroph o Inorganic material: chemolithotroph
Summary of metabolism -
Energy source provides ATP, carbon source provides precursor metabolites and the electron source provides the reducing power These three things come together to form the monomers and other building blocks that are needed to create the macromolecules for cellular structures
