Protein Function outline test one

Protein Function outline test one - Protein Function: 1....

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Protein Function: 1. Providing structural components: Protein subunits often form helical structures, and sometimes closed rings. 2. Formation of protein machines: 3. Proteins as biological switches Most important example of protein switches is phosphorylation/dephosphorylation. The most common regulatory mechanism in eukaryotic cells is the addition of a phosphate group. Protein phosphorylation involves the transfer of the terminal phosphate group of an ATP molecule to the hydroxyl group on a serine, threonine, or tyrosine side chain of a protein. A protein kinase catalyzes this reaction which is essentially one directional b/c of the large amt of energy released when phosphate- phosphate bond of ATP is broken to produce ADP. A protein phosphatase catalyzes the reverse reaction. Individual protein kinases serve as input output devices that integrate and amplify extracellular and intracellular signals. A phosphorylation event affects protein in two ways: each phosphate group carries two negative
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This note was uploaded on 03/20/2008 for the course CBIO 3400 taught by Professor Shen,kipreos during the Spring '08 term at University of Georgia Athens.

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Protein Function outline test one - Protein Function: 1....

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