Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2010-6-25
pubmed:abstractText
Variability in the temperature dependence of disulfide quenching of the tryptophan phosphorescence of globular proteins in rigid glasses is illustrated with lysozyme and alpha-bungarotoxin. A laser-pulsed phosphorescence study of this short-range interaction with a model indole-disulfide system is described. The perturbation of secondary dibutyl disulfide on the triplet state of the indole moiety in 2-(3-indolyl)ethyl phenyl ketone in rigid media is found to display a bimodal temperature dependence. The quenching rate constant at contact between chromophore and perturber is observed to be temperature independent below 30 K, but to increase with temperature between 30 and 100 K with an activation energy of approximately 200 cm(-1). The results suggest that the underlying quenching interaction involves a photo-induced one-electron transfer from the excited state of indole to the disulfide.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-14243780, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-166459, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-237041, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-2775830, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-2775831, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-4360807, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-4382800, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-4382801, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-4610571, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-5410718, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-5564816, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-5966542, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-5972381, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-6305705, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-7015406, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-7120412, http://linkedlifedata.com/resource/pubmed/commentcorrection/19431831-7448163
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
May
pubmed:issn
0006-3495
pubmed:author
pubmed:issnType
Print
pubmed:volume
61
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1364-71
pubmed:dateRevised
2010-9-24
pubmed:year
1992
pubmed:articleTitle
Temperature dependence of the disulfide perturbation to the triplet state of tryptophan.
pubmed:affiliation
Department of Chemistry, McGill University, Montreal, PQ, Canada H3A 2K6.
pubmed:publicationType
Journal Article