Linked Life Data

17193197

Source:http://linkedlifedata.com/resource/pubmed/id/17193197

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2006-12-28
pubmed:abstractText
tRNA is best known for its function as amino acid carrier in the translation process, using the anticodon loop in the recognition process with mRNA. However, the impact of tRNA on cell function is much wider, and mutations in tRNA can lead to a broad range of diseases. Although the cloverleaf structure of tRNA is well-known based on X-ray-diffraction studies, little is known about the dynamics of this fold, the way structural dynamics of tRNA is influenced by the modified nucleotides present in tRNA, and their influence on the recognition of tRNA by synthetases, ribosomes, and other biomolecules. One of the reasons for this is the lack of good synthetic methods to incorporate modified nucleotides in tRNA so that larger amounts become available for NMR studies. Except of 2'-O-methylated nucleosides, only one other sugar-modified nucleoside is present in tRNA, i.e., 2'-O-beta-D-ribofuranosyl nucleosides. The T loop of tRNA often contains charged modified nucleosides, of which 1-methyladenosine and phosphorylated disaccharide nucleosides are striking examples. A protecting-group strategy was developed to introduce 1-methyladenosine and 5''-O-phosphorylated 2'-O-(beta-D-ribofuranosyl)-beta-D-ribofuranosyladenine in the same RNA fragment. The phosphorylation of the disaccharide nucleoside was performed after the assembly of the RNA on solid support. The modified RNA was characterized by mass-spectrometry analysis from the RNase T1 digestion fragments. The successful synthesis of this T loop of the tRNA of Schizosaccharomyces pombe initiator tRNA(Met) will be followed by its structural analysis by NMR and by studies on the influence of these modified nucleotides on dynamic interactions within the complete tRNA.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1612-1880
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1153-63
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Synthesis of RNA containing O-beta-D-ribofuranosyl-(1''-2')-adenosine-5''-phosphate and 1-methyladenosine, minor components of tRNA.
pubmed:affiliation
Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov str. 32, Moscow, 119991, Russia. smikh@eimb.ru
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't