Linked Life Data

10482889

Source:http://linkedlifedata.com/resource/pubmed/id/10482889

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
1999-10-26
pubmed:abstractText
The overall architecture of the ligand binding domain (LBD) of members of the nuclear receptor superfamily are similar. There are now standard procedures to express and purify these proteins. A rapid and sensitive method for the structural analysis of these proteins is nano-electrospray tandem mass spectrometry. In the present study we have analysed the LBD of the human thyroid hormone receptor-beta-1 (TR-beta) by quadrupole time-of-flight tandem mass spectrometry. The intact protein was analysed in a carboxymethylated form in an attempt to identify which cysteine residues are located on the surface. The protein molecular weight (31 652.5 Da) was determined with an accuracy of +/-1 Da, while masses of tryptic fragments were determined with an accuracy of at least 75 ppm. The sequence coverage of the tryptic peptide mass map was 93.2 %. Tryptic peptides were subjected to collision-induced dissociation (CID) and the resulting product ions were mass measured with an accuracy of about 100 ppm. When accurate mass measurements were made with internal calibration, mass accuracies were improved to +/-2 ppm in mass spectra, and +/-20 ppm in CID spectra. From these data it was possible to determine the presence of post-translational modifications, locate the sites of carboxymethylation and, in addition, confirm the amino acid sequence of the expressed protein. To the best of our knowledge, this is the first characterisation of the TR-LBD-beta at the protein level.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0951-4198
pubmed:author
pubmed:copyrightInfo
Copyright 1999 John Wiley & Sons, Ltd.
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1782-91
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Structural analysis of the thyroid hormone receptor ligand binding domain: studies using a quadrupole time-of-flight tandem mass spectrometer.
pubmed:affiliation
Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't