The Ca2+/Phospholipid-Binding Proteins of the Submembraneous Skeleton

  • Tony Hunter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 234)


Among the best characterized substrates for the protein-tyrosine kinases are two proteins with molecular weights between 34 and 39 kDa and pI’s about 7. These proteins have been given a variety of names (Table 1), but I will refer to them here as p36 and p35. It has recently emerged that p36 and p35 are structurally and functionally related to each other and to at least two additional proteins, p67 and p33. All four proteins contain multiple copies of a related 75 amino acid repeat, and all of them bind to phospholipid bilayers in the presence of µM concentrations of Ca2+ and are localized to the inner face of cytoplasmic membranes. The true functions of these proteins are not known, but there are two major schools of thought. The first proposes that these proteins have structural roles in the cortical submembrane skeleton of the cell. The second holds that these proteins act as inhibitors of phospholipase A2, and have called them lipocortins. Here I will review the properties of these proteins, and discuss the evidence for their possible functions.


Epidermal Growth Factor Receptor Rous Sarcoma Virus Amino Acid Repeat Chromaffin Granule Phospholipid Binding 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Tony Hunter
    • 1
  1. 1.Molecular Biology and Virology LaboratoryThe Salk InstituteSan DiegoUSA

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