Description
Springer Cyclic -Glucans from Microorganisms Production Properties and Applications 2012 Edition by Geetha Venkatachalam, Sathyanarayana Gummadi, Mukesh Doble
to Cyclic glucans are polysaccharides that are predominantly produced by Agrobacterium, Bradyrhizobium and Rhizobium sp. and widely used in the pharmaceutical and food industries. In this book, the applications, properties, analytical tools, production and genes of four main cyclic -glucans from microorganisms are highlighted and critically evaluated. As biocompatible and biodegradable renewable resources, they have an immense potential for future applications, which has not yet been fully exploited. This concise review will help to bridge this gap. Table of contents : - 1. Introduction1.1. History of polysaccharides from bacteria1.2. Cyclic -glucans1.3. -cyclic glucan1.4. Linear glucans1.5. Cyclodextrins2. Applications of cyclic -glucans2.1. In food 2.2. Medical technology2.3. As wound dressing material2.4. Microparticulate form of -glucan for pharmaceutical application2.5. Synthesis of selenium nanowires2.6. Drug delivery 2.7. Enantiomeric seperator2.8. In chiral technology2.9. Chiral Stationary Phase 2.10. Carboxymethylated cyclic- -glucans as enantiomeric separators2.11. Inclusion complexes2.12. -D-Glucans complexation with Zearalenone2.13. Inclusion complex with Paclitaxel2.14. Inclusion complexation with a plant flavonoid luteolin2.15. Inclusion complexation with naproxen2.16. Functionalized -1, 3-Glucan in carbon nanotube2.17. Application of cyclic -(1, 3),(1, 6)-glucans in chiral technology3. Properties of cyclic glucans3.1. Structure3.2. Molecular biological function of -Glucans in immunity3.2.1 The -Glucan receptor - Dectin-13.3. Complex forming ability3.4. Cytotoxicity of cyclic -glucan4. Analytical tools for the characterization cyclic -glucan4.1. Silica gel thin-layer chromatography (TLC)4.2. Degree of polymerization 4.3. Compositional analysis of periplasmic glucan4.4. Glycosidic - linkage analysis4.5. Arrangement of linkages4.6. Protons and carbons in glucan4.7. Molecular weight4.8. Functional groups in cyclic -glucans4.9. Supramolecular structure4.10. Separation of mixture of cyclic- - glucan in HPLC4.11. CHN analysis 5. Production of Cyclic -glucans5.1. Osmolarity condition 5.2. Media details 5.3. Optimization of medium with mannitol5.4. Effect of media components and operating conditions 5.4.1. Carbon 5.4.2. Nitrogen 5.4.3. Temperature5.4.4. Salt and pH 6. Extraction and purification of cyclic - glucan 6.1. Extraction of cyclic - glucan from culture filtrate6.2. Isolation and purification of osmoregulated periplasmic glucans 6.3. Isolation and purification of algal cyclic glucans6.4. Purification of cyclic glucan from yeast6.5. Purification using column chromatography 7. Mechanism of cyclic -glucans production7.1. Genes responsible for synthesis of cyclic -(1, 2)-glucan in Rhizobiaceae and Agrobacteriaceae7. 1.2. Genes for cyclic -(1,3)7. 1.3. Genes for cyclic -(1,3)-(1,6)-glucan7. 1. 4. Genes for cyclic -(1,6)-(1,3)-glucan7. 2. Genes of periplasmic glucans (PGs) of the Proteobacteria7.3. Metabolic pathway of carbohydrate metabolism 7.4. Enzymes involved in Cyclic - (1,2)-glucan synthesis7.4.1. Cyclic -glucan synthase (C gs)7.4.2. - (1, 3), -(1,6)-(1,3) and -(1,3)-(1,6) glucosyltransferase7.4.3. Enzymes involved in -glucan degradation8. Conclusions