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Protein as Fuel in Cellular Respiration

Discussion in 'DAT Discussions' started by skyisblue, Apr 15, 2007.

  1. skyisblue

    skyisblue 2+ Year Member

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    Dec 25, 2006
    Please let me know if this explanation/description makes sense and is missing any pertinent details....(i feel like something's not right here)

    Okay, when proteins are used as fuel in cellular respiration, it is first hydrolyzed into their amino acids. Most of these amino acids will be used by the cell to make its proteins. Excess amino acids will be converted to other organic cpds. When being converted to other organic cpds., the amino groups are used to make other cpds. or disposed in urine. The leftover part of the amino acid now without the amino group are converted to intermediates in cellular respiration.

    Does that sound about right?
     
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  3. Lonely Sol

    Lonely Sol cowgoesmoo fan! 10+ Year Member

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    Dec 13, 2005
    Atlanta, GA
    I am little confused with the explanation but here is what I know about proteins:

    When, glucose storage is used up, anterior pitutary relases ACTH, which increases the production of cortisol. Cortisol help break proteins in to amino acids, which are then deaminated in the cytoplasm (the by-product is NH3, which is converted to urea in liver). The deamination process is done by the peroxisomes. Now the deaminated a.a are then used in the metabolism (not sure but maybe they enter the cell metab. as acetyl coA).

    Also, know that when insulin is present, it promotes the synthesis of proteins from a.a so they will not be used as fuel, rather it promotes the use of glucose, which will help get rid of glucose!

    Speaking of protein metabolism, also know the fatty acid metabolism.

    Hope this helps
     

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