doi: 10.1038/346488a0.
Detection and characterization of a folding intermediate in barnase by NMR
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- PMID: 2377210
- DOI: 10.1038/346488a0
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Detection and characterization of a folding intermediate in barnase by NMR
Nature.
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Abstract
Protein engineering is being developed for mapping the energetics and pathway of protein folding. From kinetic studies on wild-type and mutant proteins, the sequence and energetics of formation of tertiary interactions of side chains can be mapped and the formation of secondary structure inferred. Here we cross-check and complement results from this approach by using a recently developed procedure that traps and characterizes secondary structure in intermediate states using 1H NMR. The refolding of barnase is shown to be a multiphasic process in which the secondary structure in alpha-helices and beta-sheets and some turns is formed more rapidly than is the overall folding.
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