Author/Editor		Žerovnik, E; Jerala, R; Poklar, N; Kroon-Žitko, L; Turk, V
Title		Compactness of the molten globule in comparison to unfolded states as observed by size-exclusion chromatography
Type		članek
Source		Biochim Biophys Acta
Vol. and No.		Letnik 1209, št. 1
Publication year		1994
Volume		str. 140-3
Language		eng
Abstract		The volumes of elution of denatured states of four proteins at high urea (8 M) and ethylurea (6 M) concentration were determined. They were found equally unfolded in both solvents. The volumes of elution of the unfolded states were compared to those of the native states and of some molten globule intermediates. It has been shown that the protein proteinase inhibitor stefin B, exhibits 'molten globule'-like properties on acid denaturation. The high salt acidic intermediate (a molten globule) as well as the native state of stefin B eluted as dimers, at 18 degrees C. On thermal denaturation above 42 degrees C, the intermediate dissociated into compact monomers. The more stable stefin A, which is monomeric and does not transform into molten globule intermediates under similar perturbing conditions, was always used for comparison. The states of both, stefin A and B in 50 percent methanol were found to be monomeric and of native-like compactness.
Descriptors		PROTEIN CONFORMATION PROTEIN DENATURATION PROTEIN FOLDING CHROMATOGRAPHY, GEL CYSTATINS UREA