Lecture 12-13 BlkBd

Lecture 12-13 BlkBd - Although enzymes are proteins some...

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Unformatted text preview: Although enzymes are proteins, some have important contributing molecules that participate in the catalysis, such as some types of vitamins and metal ions The name of the enzyme relates to its function. Most, but not all enzyme names end in the suffix “ase.” For example: RNA polymerase catalyzes formation of RNA but not DNA. RNA nuclease hydrolyzes RNA polymers. Hexokinase accelerates the phosphorylation of a hexose monosaccharide eg. glucose. ENZYMES Figure 8.13 Example of an enzyme-catalyzed reaction: Hydrolysis of sucrose Figure 8.14 Energy profile of an exergonic reaction Activation energy Figure 8.13 Example of an enzyme-catalyzed reaction: Hydrolysis of sucrose A — B C — D + Figure 8.13 Example of an enzyme-catalyzed reaction: Hydrolysis of sucrose A — C B — C A — B C — D + Figure 8.17 The catalytic cycle of an enzyme Figure 8.16 The induced fit between an enzyme and its substrate Hexokinase - adds a phosphate group to glucose Substrate (glucose) enzyme Active site Enzyme changes shape How do enzymes alter the activation state of a reaction?...
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Lecture 12-13 BlkBd - Although enzymes are proteins some...

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