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Protein-carbohydrate recognition

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StephenMcMahonPhDThesis.pdf (40.49Mb)
Date
1999
Author
McMahon, Stephen Andrew
Supervisor
Naismith, James H.
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Abstract
Protein-carbohydrate recognition is an important target for inhibitor development. Improved inhibitor design requires a fundamental molecular basis of these interactions. This thesis describes the preliminary structural studies on three carbohydrate processing enzymes, UDP-galactopyranose mutase, alpha-D-glucose-1-phosphate thymidylyltransferase and TDP-glucose 4,6-dehydratase. These enzymes are found in important human pathogens such as Mycobacterium tuberculosis and Salmonella typhimurium. The major focus of the thesis has been on UDP-galactopyranose mutase, the enzyme responsible for catalysing synthesis of the thermodynamically unfavourable 5 membered ring form of galactose, UDP-galactofuranose from the thermodynamically favoured 6 membered ring form, UDP-galactopyranose. UDP-galactofuranose plays a key role in mycobacterial cell walls. This thesis also describes work with concanavalin A. This legume lectin is an invaluable model for the study of protein-carbohydrate interactions. Two concanavalin A complexes are discussed. Both structures clear up misunderstandings in the literature and provide an insight into designing enzyme inhibitors.
Type
Thesis, PhD Doctor of Philosophy
Collections
  • Biology Theses
URI
http://hdl.handle.net/10023/14045

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