chapter five: microbial metabolism

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chapter fivemicrobial metabolism
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oxidation-reduction

• redox reaction coupled reactions

e- removed as part of H atom
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redox reactions
aerobic respiration
oxygenic photosynthesis
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complementary metabolism
autotrophy heterotrophy
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nutritional classification metabolic strategy
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relating what we already knew
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acquiring energysubstrate level phosphorylation

• P directly from substrate to ADP ? ATP

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acquiring energy phosphorylating ADP
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chemiosmosis oxidative phosphorylation
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heterotrophy respiration fermentation

• fermentation
• organic e- acceptor
• incomplete H stripping,lower ATP yield

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the carbon source amphibolism
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metabolism media
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microbial ID fermentation
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microbial ID catabolism
desulfurase
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microbial ID catabolism
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autotrophy chemosynthesis
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chemosynthesis iron oxidation
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chemosynthesis sulfur oxidation

• Sulfolobus acidocaldarius
• chemolithoautotrophy
• energy S2- (sulfide) / S2O32- (thiosulfate)
• ? SO32- (sulfite)
• electron same
• carbon CO2 ? CH2O

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autotrophy photosynthesis
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photosynthetic electron flow chemiosmosis
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photosynthetic electron flow
non-cyclic photosynthesis
cyclic photosynthesis
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microbial CO2 fixation
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photosynthesis compared
O2
H2S