Abstract
Four high-molecular-weight proteins form the main subunits of the coat of Golgi-derived (non-clathrin) coated vesicles. One of these coat proteins, beta-COP, is identical to a Golgi-associated protein of relative mass 110,000 (110K) that shares homology with the adaptin proteins of clathrin-coated vesicles. This connection, and the comparable molecular weights of the coat proteins of Golgi-derived and clathrin-coated vesicles, indicates that they may be structurally related. The identification of beta-COP as the 110K protein explains the blocking of secretion by the drug brefeldin A.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adaptor Protein Complex beta Subunits
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Amino Acid Sequence
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Animals
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Cell Fractionation / methods
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Clathrin / chemistry*
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Coated Pits, Cell-Membrane / chemistry*
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Coated Pits, Cell-Membrane / ultrastructure
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Golgi Apparatus / chemistry*
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Membrane Proteins / chemistry*
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Membrane Proteins / isolation & purification
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Microscopy, Immunoelectron
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Molecular Sequence Data
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Proteins / chemistry*
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Proteins / isolation & purification
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Sequence Homology, Nucleic Acid
Substances
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Adaptor Protein Complex beta Subunits
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Clathrin
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Membrane Proteins
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Proteins