Study

Amino Acid Metabolism

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  • Where does oxidative deamination take place?
    In human body deamination takes place primarily in the liver mitochondria - secondarily in kidney
  • How does ammonia get transferred from skeletal muscles to the liver?
    Via the Alanine Cycle - as alanine
  • Transamination employs what type of mechanism?
    Ping-Pong
  • How can one convert alanine to aspartic acid?
    Alanine==> Pyruvate ==>Oxaloacetate==>Aspartate
  • In what form do humans excrete nitrogen waste from amino acid metabolism
    Humans excrete the nitrogenous waste from amino acids as urea
  • What coenzyme is used with Alanine Aminotransferase
    ALT (and all aminotransferases) require the coenzyme pyridoxal phosphate , which is converted into pyridoxamine in the first phase of the reaction, when an amin
  • What enzyme is used in the muscle to transfer NH3 from Glu to Ala?
    Alanine aminotransferase (ALT)
  • What enzyme is used to convert glutamate to glutamine in the tissues for transport to liver?
    Glutamine synthetase
  • What is the name of the coenzyme involved in transaminase reactions
    Pyridoxal phosphate is a coenzyme associated with — transaminases which catalyze transfer of amino groups from amino acids to keto acids.
  • What term used to describe combination of transamination and action of glutamate dehydrogenase
    Transdeamination
  • What organ is most likely to be adversely effected by high levels of ammonia
    Brain
  • What three amino acids can be made from a single non-amino acid by transamination
    alanine (Pyruvate); glutamate (alpha-keto glutarate), asparate (oxaloacetate)
  • What enzyme can use both NAD+ and NADP+?
    Glutamate dehydrogenase
  • What are two ways to remove amine groups from amino acids
    Transamination and Oxidative Deamination (There are other ways)
  • This amino acid transports ammonia from skeletal muscle to liver
    Alanine
  • Where does transamination take place?
    All cells in the body.
  • What is the name of this functional group?
    Schiff Base (Imine)
  • What is the name of the enzyme that catalyzes the deamination of glutamine?
    Glutaminase
  • How is ammonium safely transported in the blood?
    Ammonium is safely carried through the blood as glutamine. Glutamine carries 2 NH3's
  • What are some of the molecules that can be made from pyruvate?
    Acetyl CoA, Lactate, Ethanol, Oxaloacetate, Alanine, Malate, CAC intermediates, PEP, Glucose
  • What is attached to proteins to tag them for degradation
    Ubiquitin
  • What is the name of this molecule?
    Urea