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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jbsc/001/01/0075-0082

    • Keywords

       

      Mitochondria; phospholipase-D; phosphatidylcholine; phosphatidylethanolamine; phosphatidylserine; swelling; adenosine triphosphatase; Ca2+ binding

    • Abstract

       

      Incubation of purified rat kidney mitochondrial fraction with phospholipase-D resulted in the accumulation of phosphatidic acid in the membrane due to the degradation of membrane-bound phosphatidylcholine, -serine and-ethanolamine Simultaneously with the hydrolysis of the phospholipids, cholesterol and protein were released from the mitochondrial membrane into the medium, and binding of Ca2+ by mitochondrial membranes increased. Phospholipase Dtreated mitochondrial fraction exhibited increased swellingin vitro in the early stages of incubation (15 min) after which the mitochondria were ruptured. Membrane-bound adenosine triphosphatase was partially inactivated and the enzyme activity was not significantly restored by incubation with sonicated dispersions of phosphatidylcholine,-serine and cholesterol. These results indicate that removal of choline, serine and ethanolamine from membrane-bound phospholipids disrupt phospholipid-cholesterol and phospholipid-protein association and affect functions of the membrane.

    • Author Affiliations

       

      S N A Zaidi1 A C Shipstone1 N K Garg1

      1. Division of Biochemistry, Central Drug Research Institute, Lucknow - 226 001

    • Dates

       
      Published
      March 1979
      Manuscript received
      18 September 1978
      Manuscript revised
      30 November 1978

  • Journal of Biosciences | News

      Forthcoming Special issue.


    • To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".


      Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.


      Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.


      Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx

      Posted on April 12, 2023
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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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