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Calnexin and the Immunoglobulin Binding Protein (BiP) Coimmunoprecipitate with AMPA Receptors by Maria E. Rubio; Robert J. Wenthold is a Neuroscience article available to read on EtoBox.

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Abstract : To identify proteins that interact with α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazolepropionate (AMPA) receptors, we carried out coimmunoprecipitation analyses on detergent‐solubilized rat forebrain membranes. Membranes were solubilized with Triton X‐100, and immunoprecipitation was done using subunit‐specific antibodies to GluR1, GluR2/3, and GluR4 attached to protein A‐agarose. Proteins bound to the antibodies were analyzed by sodium dodecyl sulfate‐polyacrylamide gel electrophoresis followed by silver staining and western blotting. With solubilization in low ionic strength buffer, several coimmunoprecipitating proteins, with M~r~ = 17,000‐100,000, were identified in silver‐stained gels. Western blots were then probed with antibodies to a series of candidate proteins that were chosen based on the molecular masses of the copurifying proteins. Two of these were identified as the molecular chaperones calnexin (90 kDa) and the immunoglobulin binding protein (BiP ; 78 kDa). Immunoprecipitation with antibodies to calnexin and BiP demonstrated that glycosylated AMPA receptor subunits were associated. The relationship between AMPA receptors and calnexin and BiP was further studied wi

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Author

Maria E. Rubio; Robert J. Wenthold

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0022-3042)

Published

1999

Language

EN

Field

Neuroscience (Life Sciences)