Lipids II Transparencies

Lipids II Transparencies - Lipids-Complex Lipids I....

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Unformatted text preview: Lipids-Complex Lipids I. Overview of Classification Schemes Basis - Backbone of the lipid A. Glycerol-based lipids 1. Triglycerides - Glycerol + 3 fatty acids 2. Glycerol Phosphatides - Glycerol + 2 fatty acids + Phosphate + other compound a. Phosphatidylcholine - contains choline as the other compound b. Phosphatidylethanolamine - contains ethanolamine c. Phosphatidylserines - contains serine d. Phosphatidylinositols - contains inositol e. Cardiolipins - contains additional glycerol attached to another phosphatidic acid 3. Some glycolipids ie glycosyldiacylglycerols - glycerol and sugar + 2 fatty acids B. Sphingosine-based lipids (Sphingolipids) 1. Sphingomyelins - Sphingosine + 1 fatty acid + Phosphate + Choline 2. Ceramides - Sphingosine + 1 fatty acid 3. Psychosines - Sphingosine + 1 sugar 4. Cerebrosides - Sphingosine + 1 fatty acid + 1 or more sugar 5. Sulfatides - Sphingosine + 1 fatty acid + Galactose + SO 4 2- 6. Gangliosides - Sphingosine + 1 fatty acid + Sugars (Glu or Gal) + N- acetyl-neuraminic acid + N-acetylgalactosamine C. Misc. Lipids-Neither Glycerol-based nor Sphingosine-based 1. Waxes 2. Plasmalogens 3. Steroids 4. Terpenes 5. Fat Soluble Vitamins- A, D, E, and K 126 Basis - Special molecules or groups contained within them A. Phospholipids-Contains Phosphorous 1. Glycerol Phosphatides 2. Sphingomyelins 3. Plasmalogens B. Glycolipids-Contains Sugar (#1 #4 are Sphingosine-based) 1. Cerebrosides & Globosides 2. Psychosines 3. Sulfatides 4. Gangliosides 5. Glycosyldiacylglycerols - Glycerol-based C. Sphingolipids-Contains Sphingosine 1. Sphingomyelins 2. Ceramides 3. Psychosines 4. Cerebrosides 5. Sulfatides 6. Gangliosides 127 II. Glycerol Phosphatides A. All are based upon phosphatidic acid 1. Structure of phosphatidic acid 2. Note that they are glycerol based lipids 3. Note that they are phospholipids 128 B. Categories and structures of glycerol phosphatides 1. Phosphatidylcholines Lecithins 2. Phosphatidylethanolamines- Cephalins 3. Phosphatidylserines Cephalins 4. Phosphatidylinositols 5. Phosphatidylglycerols 6. Cardiolipins 129 130 C. General functions of glycerolphosphatides 1. Play essential role in cell wall structure 2. Play essential role in cell membrane structure 3. Play essential role in organelle membrane structure a. Nucleus b. Mitochondrion c. Endoplasmic reticulum 131 D. Theories of membrane structure - Dr. Long will deal with membranes E. Specialized Functions of Glycerol Phosphatides 1. Phosphatidyl Cholines (Lecithins) a. Help transport fats from one tissue to another - Act as emulsifying agents 132 b. Types of Emulsification 1. TG + GP ------> Emulsified TG droplets (small) - way triglycerides are emulsified in small intestine to aid in digestion 2. Protein + TG + GP ------> Chylomicra (big) - way triglycerides are transported once they are in the blood 3. Lipoproteins Emulsified TG and cholesterol in blood (small) 133 a. Kinds and components Lipo- proteins 134 b. Summary of where they come from and what happens to them - transparency 135 c. HDL vs LDLc....
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Lipids II Transparencies - Lipids-Complex Lipids I....

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