Improved efficiency sos recruitment system: expression of the mammalian GAP reduces isolation of Ras GTPase false positives.
Open Access
- 1 August 1997
- journal article
- research article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 25 (16) , 3373-3374
- https://doi.org/10.1093/nar/25.16.3373
Abstract
The Sos recruitment system (SRS) is a novel genetic method for detecting protein-protein interactions. The method is based on localizing Sos, a Ras guanyl nucleotide exchange factor (GEF), to the plasma membrane through interaction between two fusion proteins. Mammalian Ras can bypass the requirement for a functional Ras GEF and represents a predictable false positive in this system. This report demonstrates that introduction of mammalian GTPase activating protein (mGAP) reduces the isolation of Ras false positives in SRS screens of mammalian cDNA libraries, thereby significantly enhancing the efficiency of the system.Keywords
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