Guanine-nucleotide-binding proteins expressed in rat white adipose tissue. Identification of both mRNAs and proteins corresponding to Gi1, Gi2 and Gi3
- 1 September 1989
- journal article
- research article
- Published by Portland Press Ltd. in Biochemical Journal
- Vol. 262 (2) , 403-408
- https://doi.org/10.1042/bj2620403
Abstract
Considerable debate has focused on the molecular identity of the guanine-nucleotide-binding proteins (G-proteins) in adipose tissue which can be detected following pertussis-toxin-catalysed ADP-ribosylation [Rapiejko, Northup, Evans, Brown & Malbon (1986) Biochem. J. 240, 35-40; Hinsch, Rosenthal, Spicher, Binder, Gausepohl, Frank, Schultz & Joost (1988) FEBS Lett. 238, 191-196]. We have used a panel of selective anti-peptide antisera which are able to discriminate between the different pertussis-toxin-sensitive G-proteins to assess which of these are expressed in rat adipose tissue. We demonstrate that plasma membranes of rat white adipocytes contain alpha subunits corresponding to each of Gi1, Gi2 and Gi3. Furthermore, using synthetic oligonucleotides complimentary to unique regions of each of the three polypeptides, we demonstrate that the mRNAs for the three G-protein alpha subunits can also be detected in adipose tissue.This publication has 34 references indexed in Scilit:
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