The molten globule state of α‐lactalbumin

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Abstract
The molten globule state of alpha-lactalbumin is the best-characterized folding intermediate of globular proteins and has been studied intensively by various spectroscopic and physiochemical techniques, including stopped-flow CD and fluorescence spectroscopies, a hydrogen-exchange technique, 1H-NMR spectroscopy, disulfide-exchange chemistry, site-directed mutagenesis, and calorimetric techniques. This review summarizes recent studies. Major findings about the structure of the molten globule state are: 1) It is highly heterogeneous, having a highly structured alpha-helical domain with the beta-sheet domain being significantly unfolded; and 2) it is not a nonspecific, collapsed polypeptide but already has a native-like tertiary fold. These structural characteristics are essential to fully understand the thermodynamic properties of the molten globule state which are described in connection with a recently proposed computational approach to predict the structure of the molten globule state of a protein. Mutan...

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