期刊
GENE
卷 261, 期 1, 页码 85-91出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-1119(00)00471-6
关键词
mRNA 5 ' untranslated regions; translation initiation; GC content; isochore; upstream AUG; post-translational regulation
The AUG start codon context features have been investigated by analyzing eukaryotic mRNAs belonging to various taxonomic groups. The functional relevance of each specific position surrounding the AUG start codon has been established as a function of the measured shift between base composition observed at that particular position, and base composition averaged over all the 5'untranslated regions. A more detailed analysis carried out on human genes belonging to different isochores showed significant isochore-specific features that cannot be explained only by a mutational bias effect. The most represented heptamers spanning from position -3 to +4 with respect to the initiator AUG have been determined for mRNAs belonging to different taxonomic groups and a web page utility has been set up (http://bigarea.area.ba.cnr.it: 8000/BioWWW/ATG.html) to determine the relative abundance of a user submitted oligonucleotide context in a given species or taxon. (C) 2000 Elsevier Science B.V. All rights reserved.
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