Sequestration of GPI-anchored proteins in caveolae triggered by cross-linking

阅读量:

74

作者:

S MayorK RothbergF Maxfield

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摘要:

Glycosyl-phosphatidylinositol (GPI)-anchored proteins have been reported to reside in clusters collected over small membrane invaginations called caveolae. The detection of different GPI-anchored proteins with fluorescently labeled monoclonal antibodies showed that these proteins are not constitutively concentrated in caveolae; they enter these structures independently after cross-linking with polyclonal secondary antibodies. Analysis of the cell surface distribution of the GPI-anchored folate receptor by electron microscopy confirms these observations. Thus, multimerization of GPI-anchored proteins regulates their sequestration in caveolae, but in the absence of agents that promote clustering they are diffusely distributed over the plasma membrane.

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DOI:

10.1126/science.7516582

被引量:

1042

年份:

1994

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1998
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