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Theory of cooperative transitions in protein molecules. II. Phase diagram for a protein molecule in solution

✍ Scribed by Alexey V. Finkelstein; Evgeny I. Shakhnovich

Publisher: Wiley (John Wiley & Sons)
Year: 1989
Tongue: English
Weight: 707 KB
Volume: 28
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.360281004

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✦ Synopsis

The thermodynamically stable states of denatured protein in solution are investigated. These states are distinguished from the native state by the absence of tight packing of side chains while the compactness of denatured protein may vary within a wide region. The following regimes are outlined:

the "wet" molten globule, i.e., the compact state with pores occupied by solvent; 2. the swollen globule ("wet," of course); and 3. the coil.

The "dry" molten globule, when solvent does not penetrate inside the protein, is excluded for all experimental conditions. All the transitions within the denatured globule state are gradual while the denatured globule-coil phase transition is a second order one. The conditions of protein denaturation as well as conditions of transitions and crossovers within the denatured state are outlined.

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