Proteolipid protein and DM-20 are synthesized by Schwann cells, present in myelin membrane, but they are not fatty acylated

Proteolipid protein (PLP) and DM-20 were intensely labeled after immunoprecipitation of total cellular proteins and myelin proteins labeled with [35S]methionine in nerve slices. These results provided evidence that PLP and DM-20 are incorporated into the myelin membrane following their synthesis in...

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Bibliographic Details
Published in:Neurochemical research 1991-08, Vol.16 (8), p.855-858
Main Authors: Agrawal, H C, Agrawal, D
Format: Article
Language:English
Subjects:
Acylation
Animals
Brain - metabolism
In Vitro Techniques
membrane proteins
Methionine - metabolism
myelin
Myelin Proteins - biosynthesis
Myelin Proteolipid Protein
Myelin Sheath - metabolism
Nerve Tissue Proteins
Palmitic Acid
Palmitic Acids - metabolism
Peripheral Nerves - metabolism
Protein Processing, Post-Translational
proteolipid protein
Rats
Schwann Cells - metabolism
Sulfur Radioisotopes
Tritium
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Summary:Proteolipid protein (PLP) and DM-20 were intensely labeled after immunoprecipitation of total cellular proteins and myelin proteins labeled with [35S]methionine in nerve slices. These results provided evidence that PLP and DM-20 are incorporated into the myelin membrane following their synthesis in Schwann cells. In contrast, PLP and DM-20 were not fatty acylated after incubation of the nerve slices with [3H]palmitic acid, however, P0 glycoprotein and 24 kDa protein were heavily fatty acylated. The lack of fatty acylation of PLP and DM-20 in the peripheral nervous system suggests that fatty acyltransferase responsible for their acylation is absent or non-functional in the peripheral nervous system.
ISSN:0364-3190
1573-6903
DOI:10.1007/BF00965533