Linked Life Data

2124148

Source:http://linkedlifedata.com/resource/pubmed/id/2124148

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6-7
pubmed:dateCreated
1991-1-29
pubmed:abstractText
This report presents the conceptual and methodological framework that presently underlies the experiments designed to decipher the structural features in tRNA important for its aminoacylation by aminoacyl-tRNA synthetases. It emphasizes the importance of conformational features in tRNA for an optimized aminoacylation. This is illustrated by selected examples on yeast tRNA(Asp). Using the phage T7 transcriptional system, a series of tRNA(Asp) variants were created in which conformational elements were modified. It is shown that aspartyl-tRNA synthetase tolerates conformational variability in tRNA(Asp) at the level of the D-loop and variable region, of the tertiary Levitt base-pair 15-48 which can be inverted and in the T-arm in which residue 49 can be excised. However, changing the anticodon region completely abolishes the aspartylation capacity of the variants. Transplanting the phenylalanine identity elements into a different tRNA(Asp) variant presenting conformational characteristics of tRNA(Phe) converts this molecule into a phenylalanine acceptor but is less efficient than wild-type tRNA(Phe). This engineered tRNA completely loses its aspartylation capacity, showing that some aspartic acid and phenylalanine identity determinants overlap. The fact that chimeric tRNA(Asp) molecules with altered anticodon regions lose their aspartylation capacity demonstrates that this region is part of the aspartic acid identity of tRNA(Asp).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0300-9084
pubmed:author
pubmed:issnType
Print
pubmed:volume
72
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
453-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Exploring the aminoacylation function of transfer RNA by macromolecular engineering approaches. Involvement of conformational features in the charging process of yeast tRNA(Asp).
pubmed:affiliation
Institut de Biologie Moléculaire et Cellulaire du CNRS, Strasbourg, France.
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't