BIOL 228 Lecture Notes - Lecture 17: Carboxylation, Ribulose, Methionine
22 Dec 2017
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Energy: transferred from energy source to synthetic systems of cell: assembly of macromolecules into cellular structures. Anabolism requires energy and source of electrons: by atp. Metabolic pathways: acetyl-coa, glucose 6-phosphate, oxaloacetate, pyruvate, Phosphoenolypyruvate, ribose-5-phosphate, glyceraldehyde 3- phosphate, erthrose 4-phosphate, - ketoglutarate, 3- phosphoglycerate, succinyl-coa. But what about autotrophs: derive energy (atp, nadph) by trapping light during photosynthesis or from the oxidation of reduced inorganic electron donors, how do they utilize this energy to generate precursor metabolites from. Co2? (their carbon source: must convert co2 into organic carbon from which they can generate the precursor metabolites, microbes have at least 5 co2 fixation pathways, calvin cycle (used by most autotrophs), reductive tca cycle, 3- Atp + glucose 1-p adp-glucose + ppi (glucose)n + adp-glucose (glucose)n+1 + adp: for biosynthesis of necessary biomolecule for life, cells also require, nitrogen, sulfur, and phosphate. Phosphorus requirements of the cell: phosphorus is found in nucleic acids as well as proteins, phospholipids,
