Cycle Du Glyoxylate

Cycle du glyoxylate

Le cycle du glyoxylate est un dérivé anabolique du cycle de Krebs. Il se réalise dans le glyoxysome des graines et permet leur germination en transformant ses réserves de lipides en glucides qui seront la source d'énergie de la photosynthèse.

Bilan : 2 Acétyl CoA + NAD+ + 2 H2O → Succinate + 2 CoASH + NADH

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  • Cycle du glyoxylate — Le cycle du glyoxylate est un dérivé anabolique du cycle de Krebs. Il se réalise dans le glyoxysome des graines et permet leur germination en transformant ses réserves de lipides en glucides qui seront la source d énergie de la photosynthèse.… …   Wikipédia en Français

  • Glyoxylate cycle — The glyoxylate cycle is a metabolic pathway occurring in plants, certain vertebrates, and several microorganisms, such as E. coli and yeast.The glyoxylate cycle allows these organisms to use fats for the synthesis of carbohydrates. This sequence… …   Wikipedia

  • Cycle du 3-hydroxypropionate — Le cycle du 3 hydroxypropionate est une voie métabolique de fixation du dioxyde de carbone CO2 observée chez certaines bactéries, par exemple du genre Chloroflexus, ainsi que chez certaines archées chimiotrophes[1]. Les principales étapes de ce… …   Wikipédia en Français

  • cycle — 1. A recurrent series of events. 2. A recurring period of time. 3. One successive compression and rarefaction of a wave, as of a sound wave. [G. kyklos, circle] anovulatory c. a …   Medical dictionary

  • glyoxylate cycle — (gli ok sī lat) A modified tricarboxylic acid cycle in which the decarboxylation reactions are bypassed by the enzymes isocitrate lyase and malate synthase; it is used to convert acetyl CoA to succinate and other metabolites …   Dictionary of microbiology

  • glyoxylate cycle — a metabolic pathway by which certain microorganisms and plants convert fat to carbohydrate; its enzymes are contained in microbodies known as glyoxysomes. It is a modification of the tricarboxylic acid cycle but differs in that two auxiliary… …   Medical dictionary

  • glyoxylate cycle — Metabolic pathway present in bacteria and in the glyoxisome of plants, in which two acetyl CoA molecules are converted to a 4 carbon dicarboxylic acid, initially succinate. Includes two enzymes not found elsewhere, isocitrate lyase and malate… …   Dictionary of molecular biology

  • glyoxylate cycle — noun A series of metabolic reactions by which many different organisms utilise fats for the synthesis of carbohydrates …   Wiktionary

  • Citric acid cycle — Overview of the citric acid cycle The citric acid cycle also known as the tricarboxylic acid cycle (TCA cycle), the Krebs cycle, or the Szent Györgyi Krebs cycle[1] …   Wikipedia

  • Acide glyoxylique — Molécule d acide glyoxylique. Général …   Wikipédia en Français

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