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Biochemistry Flashcards

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6314746626Primary structureamino acid sequence0
6314774911hydrolasehydrolyzes chemical bonds (Atlases, proteases)1
6314777422Isomeraserearranges bond within a molecule to form an isomer2
6314781498Ligaseforms a chemical bond (DNA ligase)3
6314783816Lyasebreak chemical bonds by means other than oxidation or hydrolysis (pyruvate decarboxylase)4
6314790537Kinasetransfer a phosphate group to a molecule to a molecule from a high energy carrier, such as ATP (phosphofructokinse PFK)5
6314797698Oxidoreductaseruns reduce reactions6
6314801670Polymerasepolymerization (addition of nucleotides to the leading strand of DNA by DNA polymerase)7
6314804334Phosphataseremoves a phosphate group from a molecule8
6314817453Proteasehydrolyzes peptide bonds9
6314842582Competitive inhibitors-compete with substrate for the active site -Vmax is not changed -Km is increased, because you can overcome the inhibitor by increasing the amount of substrate - the affinity is decreased because it takes more substrate to reach Km -Think of it as a alcoholic versus freshman The alcoholic is going to take a lot longer to get drunk because his tolerance is increased (Km increased), thus his receptors are less sensitive, his affinity has decreased A freshman who doesn't drink, will only need a few beers to get drunk (Km) so the Km is decreased, thus the freshman has more affinity for the alcohol from one beer.10
6314895703Non competitive inhibitor-Inhibitor can bind to the enzyme with or without the substrate bond to it -Vmax is decreased because the amount of functional ES complexes is decreased. -the substrate can bind without any problems, so Km does not change11
6315017462Uncompetitive inhibition-Inhibitor binds the to allosteric site of the ES complex and does not allow the product to be made. -Reduces the number of functioning ES complexes, thus reduces product -Vmax is decreased -Km has decreased, the affinity has increased, the enzyme complex has such a high affinity for the substrate that it will not leave the active site of the enzyme complex On the plot,it is opposite of what you say since its the inverse.12
6315255331Line weaver-Burke Plotslope: Km/Vmax y-intercept: 1/vmax x-intercept: -1/Km ** Increase in substrate concentration means a decrease in the value along the x-axis because it is the inverse ** increase the reaction rate V is a decrease in the inverse of the reaction , so reaction rate increases, the value along the y-axis decreases.13
6315306695Bronsted-Lowry Acids and basesBAD Bronsted, Acid, Donates Acid: Protons (H+) donors Base: Proton (H+) accepters14
6315330449Oxidation Reaction Reduction ReactionOxidation: Gain of oxygen molecule, loss of hydrogen atoms, loss of electrons Reduction: is the opposite of oxidation15
6315342432Exergonic EndergonicNegative Delta G Postive Delta G16
6315342433Ka value pka value-the larger the Ka the stronger the acid; the smaller the Ka value, the weaker the acid -lower pka, stronger the acid, easily deprotonated -pH greater than pka, acid is deprontonated (basic solution)17
6315393392Secondary structureHydrogen bonds between back bond, Proline kinks for beta sheets, and alpha helix18
6315398089Tertiary structurehydrophobic and hydrophilic interactions between amino acids residues located more distantly from each other in the polypeptide chains.19
6315410854Quaternary structurevarious bonds between separate chains20
6315575959VmaxConstant, it depends on enzyme concentration and what enzyme you have. Vmax is when all substrates are fully saturated, when enzymes are attached to active site all the time21
6315601515KmHow much substrate you need to have in order to make 1/2 vmax -measure of the enzymes affinity for that specific substrate -Km low, the enzyme has a high affinity for that substrate -Km high, the enzyme does not have a high affinity for that substrate (drink a lot, need more alcohol to get buzz)22
6331065151Periodic table trends23

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