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- W2012069056 abstract "The proteolipid proteins (PLP and DM20) are major constituents of CNS myelin, but how they are delivered to and organized within the oligodendrocyte plasma membrane is incompletely understood. We have expressed both PLP and DM20 singly or together in a host cell line, HeLa. In either DM20 or PLP transfectants, at early time points (24 hours), the expressed proteins are found within intracellular compartments. In DM20 transfectants, the protein is delivered to the plasma membrane by 48 hours. In HeLa cells, PLP remains intracellular when expressed in the absence of DM20; only when it is coexpressed with DM20 is it transported to the plasma membrane. In cotransfectants, PLP can also be localized to organelles involved in both the protein biosynthetic and the endocytic pathways. Since, in HeLa cells at least, the delivery of PLP to the plasma membrane is facilitated by the coexpression of DM20, we suggest that the two proteins interact intracellularly to form a complex. In some PLP/DM20 cotransfectants, the proteolipids are concentrated in regions of cell-cell contact. The regional accumulation of these proteins at cell-cell interfaces is highly reminiscent of the behavior in transfected cells of another myelin protein, Po, and certain cadherin polypeptides, both of which have readily demonstrable membrane adhesive properties. Our data suggests that at certain stoichiometric ratios, proteolipids can become stablized at cell surfaces to form adhesive bonds. © 1994 Wiley-Liss, Inc." @default.
- W2012069056 created "2016-06-24" @default.
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- W2012069056 date "1994-04-01" @default.
- W2012069056 modified "2023-10-18" @default.
- W2012069056 title "Proteolipid protein interactions in transfectants: Implications for myelin assembly" @default.
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- W2012069056 doi "https://doi.org/10.1002/jnr.490370502" @default.
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