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PMID:8195289
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| Citation |
Dahl, SC, Geib, RW, Fox, MT, Edidin, M and Branton, D (1994) Rapid capping in alpha-spectrin-deficient MEL cells from mice afflicted with hereditary hemolytic anemia. J. Cell Biol. 125:1057-65 |
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| Abstract |
A spectrin-based membrane skeleton is important for the stability and organization of the erythrocyte. To study the role of spectrin in cells that possess complex cytoskeletons, we have generated alpha-spectrin-deficient erythroleukemia cell lines from sph/sph mice. These cells contain beta-spectrin, but lack alpha-spectrin as determined by immunoblot and Northern blot analyses. The effects of alpha-spectrin deficiency are apparent in the cells' irregular shape and fragility in culture. Capping of membrane glycoproteins by fluorescent lectin or antibodies occurs more rapidly in sph/sph than in wild-type erythroleukemia cells, and the caps appear more concentrated. The data support the idea that spectrin plays an important role in organizing membrane structure and limiting the lateral mobility of integral membrane glycoproteins in cells other than mature erythrocytes. |
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| Keywords |
Animals; Cell Membrane/metabolism; Cell Membrane/ultrastructure; Friend murine leukemia virus; H-2 Antigens/metabolism; Immunologic Capping; Leukemia, Erythroblastic, Acute; Mice; Mice, Mutant Strains; Spectrin/deficiency; Spectrin/physiology; Time Factors |
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