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A universal entropy-driven mechanism for thioredoxin?target recognition #MMPMID26080424
Palde PB; Carroll KS
Proc Natl Acad Sci U S A 2015[Jun]; 112 (26): 7960-5 PMID26080424show ga
Thioredoxin (Trx) is universally conserved thiol-oxidoreductase that regulates numerous cellular pathways under thiol-based redox control, and its activity is often upregulated in malignant cancer cells. Despite its central importance, the mechanism by which Trx recognizes its target proteins remains unknown. Herein, we address this longstanding question by investigating the noncovalent forces involved in Trx?target interactions. Using a combination of biochemical and quantitative biophysical methods, we identify favorable entropy as the major force in molecular recognition that drives target specificity. These findings, and others reported herein, afford considerable new insight into Trx?target recognition, which is critical to understanding its function in normal metabolism and represents a fundamental step toward the development of new pharmacological strategies to address redox-related disorders.