Linked Life Data

8126732

Source:http://linkedlifedata.com/resource/pubmed/id/8126732

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1994-4-8
pubmed:abstractText
A method for prediction of transmembrane segments from multiply aligned amino acid sequences is presented. For the calculations, two sets of propensity values were used: one for the middle, hydrophobic portion and one for the terminal regions of the transmembrane sequence spans. Average propensity values were calculated for each position along the alignment, with the contribution from each sequence weighted according to its dissimilarity relative to the other aligned sequences. Eight-residue segments were considered as potential cores of transmembrane segments and elongated if their middle propensity values were above a given threshold. End propensity values were also considered as stop signals. Only helices with length of 15 to 29 residues were allowed and corrections for strictly conserved charged residues were also made. The method is shown to be more successful than predictions based upon single sequences alone. In the test set of 28 families with 126 transmembrane segments, only five spans were not predicted or constituted false positives. The method is applied to sequence families for which data on transmembrane segments do not exist or are sparse or contradictory included voltage-gated potassium-channels, cytochrome c oxidases, NADH-ubiquinone oxidoreductase, beta-glucosides-specific phosphotransferase enzyme and major surface antigen of hepatitis B virus.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-2836
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
237
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
182-92
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Prediction of transmembrane segments in proteins utilising multiple sequence alignments.
pubmed:affiliation
European Molecular Biology Laboratory, Heidelberg, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't