Linked Life Data

10981808

Source:http://linkedlifedata.com/resource/pubmed/id/10981808

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-12-13
pubmed:abstractText
Alcohol-induced conformational transitions of erv C, a highly stable cysteine protease, were followed by CD, fluorescence, and activity. At acidic pH, the addition of different alcohols caused two types of conformational transitions. Increasing the concentration of nonfluorinated alkyl alcohols induced a conformational switch from alpha-helix to beta-sheet. Under these conditions, the protein lost its proteolytic activity and tertiary structure. The switch was a sudden one, observed in 50% methanol, 45% ethanol, and 40% propanol. Under similar conditions of pH and concentration, however, glycerol and TFE enhanced the alpha-helicity of the protein. Methanol-induced denaturation was observed to occur in two stages; the first is the beta-sheet state stabilized at low alcohol concentrations, and the other is the beta-sheet state with enhanced ellipticity stabilized at high alcohol concentrations. This beta-sheet conformation can be attained from the native as well as 6 M GuHCl-denatured state by addition of methanol and exhibits properties different from the native or unfolded state. This state shows loss of tertiary structure and activity, enhanced nonnative secondary structure, noncooperative temperature unfolding, and higher stability toward denaturants as compared to the native state, which are characteristic of the molten globule-like state or O-state, and thus this state may be functioning as an intermediate in the folding pathway of erv C.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0277-8033
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
169-76
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Alcohol-induced conformational transitions in ervatamin C. An alpha-helix to beta-sheet switchover.
pubmed:affiliation
Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't