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Lecture5powerpointslides - Slides 4/13/10 1. Glycogen...

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Unformatted text preview: Slides 4/13/10 1. Glycogen catabolism: extra-cellular, intra-cellular 2. Decarboxylation reactions- α keto acids 3. PDC/ PDH reactions 4. More vitamin-coenzymes H O H H OH H OH CH 2 OH Structure of Glycogen and Amylopectin H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 OH H O H OH H OH CH 2 OH OH O O O O reducing end non-reducing "end" 1 2 3 4 5 6 O H HO H HO H OH OH H H HO O H HO H HO H OH OH H H OH O H H HO H OH OH H H OH O H HO H HO H O OH H H HO = ( ! 1 4) linkages Plant carbohydrate storage form is Starch= amylose (linear ! 1 4 linked glucose) + amylopectin (branch points @ ~ 24 residues) Glycogen is branched glucose polymer with branch points @~8-12 residues 24 polysaccharides H O H H OH H OH CH 2 OH Structure of Glycogen and Amylopectin H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 OH H O H OH H OH CH 2 OH OH O O O O reducing end non-reducing "end" 1 2 3 4 5 6 O H HO H HO H OH OH H H HO O H HO H HO H OH OH H H OH O H H HO H OH OH H H OH O H HO H HO H O OH H H HO = ( ! 1 4) linkages Plant carbohydrate storage form is Starch= amylose (linear ! 1 4 linked glucose) + amylopectin (branch points @ ~ 24 residues) Glycogen is branched glucose polymer with branch points @~8-12 residues 24 polysaccharides H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 H O H OH H OH CH 2 OH O O O O H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 OH H O H H OH H OH CH 2 OH O O O OH 1 2 3 4 5 6 O ( ! 1 6) branch point ( ! 1 4) linkages etc 24 25 All these are hydrolytic enzymes-secreted O OH OH OH OH CH 2 OH all use H 2 GLC !-Amylase Glycogen (Starch) Hydrolysis ! (1 6) Glucosidase "-Amylase (plant only) !-Amylase (any glycogen/starch-injesting organism) (plants) Isomaltase or Dextrinase (animals) For Animals- from food- plant starch, meat glycogen For Plants- seed starch is acellular Extracellular starch/glycogen is hydrolyzed Extracellular 25 H 2 2 GLC Maltase maltose O OH OH OH CH 2 OH O OH OH OH CH 2 OH O Storage of Glycogen in Mammals...
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This note was uploaded on 04/16/2010 for the course BIS 103 taught by Professor Abel during the Spring '08 term at UC Davis.

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Lecture5powerpointslides - Slides 4/13/10 1. Glycogen...

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