A Photochemical Switch for Controlling Protein–Protein Interactions
✍ Scribed by Sonia K. Pollitt; Peter G. Schultz
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 113 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0044-8249
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✦ Synopsis
Incorporation of an unnatural amino acid containing a photolabile group in the side chain allows specific interactions between two proteins to be prevented. The photocaged ras protein in which Asp 38 has been substituted by its β-nitrobenzyl ester (Nb) is unable to interact with its effector protein p120-GAP (see drawing below) although it has the same intrinsic GTPase activity. After photocleavage of the Nb group, 50% of the p120-GAP-dependent GTPase activity relative to the wild-type protein is restored.
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