alexa Expression and purification of the C-terminal fragments of TRPV5 6 channels.
Biochemistry

Biochemistry

Biochemistry & Physiology: Open Access

Author(s): Kovalevskaya NV, Schilderink N, Vuister GW

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Abstract The transient receptor potential vanniloid 5 and 6 (TRPV5 and TRPV6) Ca(2+)-ion channels are crucial for the regulation of minute-to-minute whole body calcium homeostasis. They act as the gatekeepers of active Ca(2+) reabsorption in kidney and intestine, respectively. In spite of the great progress in the TRP channels characterization, very little is known at the atomic level about their structure and interactions with other proteins. To the major extent it is caused by difficulties in obtaining suitable samples. Here, we report expression and purification of 36 intracellular C-terminal fragments of TRPV5 and TRPV6 channels, for which no structural information is reported thus far. We demonstrate that these proteins contain intrinsically disordered regions and identify fragments suitable for biophysical characterization. By combining bioinformatic predictions and experimental results, we propose several criteria that may aid in designing a scheme for large-scale production of difficult proteins. Copyright © 2011 Elsevier Inc. All rights reserved. This article was published in Protein Expr Purif and referenced in Biochemistry & Physiology: Open Access

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