Protein Vivisection Reveals Elusive Intermediates in Folding
نویسندگان
چکیده
منابع مشابه
Characterizing protein folding intermediates.
To determine the pathway by which a protein folds up, it is necessary to characterize the structures of folding intermediates and also to place these intermediates in the correct order on the kinetic pathway of folding. Noncovalent folding reactions are fast: typically they occur in seconds or less for small single-domain proteins. On the other hand, hours are required to obtain detailed struct...
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The folding reactions of some small proteins show clear evidence of a hierarchic process, whereas others, lacking detectable intermediates, do not. Evidence from folding intermediates and transition states suggests that folding begins locally, and that the formation of native secondary structure precedes the formation of tertiary interactions, not the reverse. Some notable examples in the liter...
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Chaperonins are known to facilitate protein folding, but their mechanism of action is not well understood. The fact that target proteins are released from and rebind to different chaperonin molecules ("cycling") during a folding reaction suggests that chaperonins function by unfolding aberrantly folded molecules, allowing them multiple opportunities to reach the native state in bulk solution. H...
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The paper presents a model for simulating the protein folding process in silico. The two-step model (which consists of the early stage-ES and the late stage-LS) is verified using two proteins, one of which is treated (according to experimental observations) as the early stage and the second as an example of the LS step. The early stage is based solely on backbone structural preferences, while t...
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In order to solve the immensely difficult protein-folding problem, it will be necessary to characterize the barriers that slow folding and the intermediate structures that promote it. Although protein-folding intermediates are not accessible to the usual structural studies, hydrogen exchange (HX) methods have been able to detect and characterize intermediates in both kinetic and equilibrium mod...
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ژورنال
عنوان ژورنال: Journal of Molecular Biology
سال: 2010
ISSN: 0022-2836
DOI: 10.1016/j.jmb.2010.01.056