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2016 ; 111
(5
): 925-36
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Structure-Based Prediction of Protein-Folding Transition Paths
#MMPMID27602721
Jacobs WM
; Shakhnovich EI
Biophys J
2016[Sep]; 111
(5
): 925-36
PMID27602721
show ga
We propose a general theory to describe the distribution of protein-folding
transition paths. We show that transition paths follow a predictable sequence of
high-free-energy transient states that are separated by free-energy barriers.
Each transient state corresponds to the assembly of one or more discrete,
cooperative units, which are determined directly from the native structure. We
show that the transition state on a folding pathway is reached when a small
number of critical contacts are formed between a specific set of substructures,
after which folding proceeds downhill in free energy. This approach suggests a
natural resolution for distinguishing parallel folding pathways and provides a
simple means to predict the rate-limiting step in a folding reaction. Our theory
identifies a common folding mechanism for proteins with diverse native structures
and establishes general principles for the self-assembly of polymers with
specific interactions.