PPT-Enzyme Kinetics and Inhibition

Pratt amp Cornely Ch 7 Enzyme Kinetics How fast an enzyme catalyzed reaction goes Why study enzyme kinetics Helps us understand mechanism of enzyme how it works Investigation of mutations in metabolic pathways. 1 Competitive Inhibition Fig 8- 2 Competitive InhibitionCTEuli S + S E P + E c = K . ( [ c / K c / Vx sl re S bu i n a S bd t fee E a a s wre S bd c w S f fee E S 7.6.1: STATE: metabolic pathways consist of chains and cycles of enzyme catalysed reactions. 7.6.2: Describe the induced-fit model.. 7.6.3: Explain that enzymes are biological catalysts that lower the activation energy of reactions.. Inhibition. C483 Spring 2013. Questions. 1. . An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation? . A. ) It must be a competitive inhibitor. . Inhibition is a term used to describe the inability of a product being formed due to the presence of another substance (the inhibitor). Enzyme inhibition . can be competitive or noncompetitive. Competitive inhibition is caused when an inhibitor “competes” with the substrate in binding with the enzyme. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture. 15. Today’s. . lecture. Enzymes . Michealis-Menten. Pratt & . Cornely. . Ch. 7. Other Factors. Other factors affect enzyme activity. Temperature. pH . pH Optimum. Determined by structural stability. Compartmentalization. Determined by active site residues. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture. 15. Lecture . 15 . – . Tuesday 3/12/2013. Enzymatic Reactions. activity . of . beta-. fructofuranosidase. . and the Mechanism of. Inhibition by Copper (II) Sulfate . Type of Inhibitors . There exist a number of molecular species which, in the presence of . an enzyme and its substrate. The structure of a noncompetitive inhibitor does not resemble the substrate and does not compete for the active site. .. Learning Goal . . Describe competitive and . noncompetitive inhibition . and reversible and irreversible inhibition. 322 BCH. Exp. (8). In this experiment, we will continue to study . acid phosphatase . kinetics.. Objectives. To . study the effect of inhibitors on the rate of an enzymatic reaction.. To . determine the type of inhibition of acid phosphatase by inorganic phosphate and sodium fluoride. . Lipitor: HMG-CoA reductase, inhibits a liver enzyme that is important in biosynthesis of cholesterol (>$100 billion total sales since 1996).. Viread & Emtriva: reverse transcriptase inhibitors, anti-retrovirus (HIV).. 1 In this exercise we will look at the catalytic behavior of enzymes. You will use Excel to answer the questions in the exercise section. At the end of this session, you must hand in answers to all Drill:. . What background knowledge do you have on enzymes?. Enzyme Structure and Function. Enzymes are . protein catalysts. They speed up the rate at which reactions occur. Lower the activation energy by creating a microenvironment that is energetically more favorable for a reaction. . singh. thakur. Department of biochemistry. Enzyme Inhibition/Inhibitor. :. An Enzyme inhibitor is a compound that decreases or tends to decrease the rate of an enzyme catalyzed reaction by influencing the binding of substrate or its turnover number..