Gn‐proteins are distinct from ras p21 and other known low molecular mass GTP‐binding proteins in the platelet
- 12 September 1988
- journal article
- Published by Wiley in FEBS Letters
- Vol. 237 (1-2), 168-172
- https://doi.org/10.1016/0014-5793(88)80194-7
Abstract
The 27 kDa platelet membrane protein (Gn27) that binds [α-32P]GTP on nitrocellulose blots of SDS-polyacrylamide gels [(1987) Biochem. J. 245, 617–620] was compared with other low molecular mass GTP-binding proteins. Platelet membranes also contained 21 kDa proteins that bound anti-ras p21 antibody and 22–23 kDa proteins that could be ADP-ribosylated by botulinum neurotoxin type D. These groups of proteins were resolved electrophoretically from each other and from Gn27. A low molecular mass GTP-binding protein from bovine brain [(1987) Biochem. J. 246, 431–439] was also resolved from Gn27. At the levels normally present in cell membranes, only Gn-proteins bound significant amounts of [32P]GTP after transfer of protein from SDS-polyacrylamide gels to nitrocellulose.Keywords
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