Nucleic Acids Research, Vol 26, Issue 1 163-165, Copyright © 1998 by Oxford University Press
KP Williams and DP Bartel
tmRNA (also known as 10Sa RNA) is so-named for its dual tRNA-like and
mRNA-like nature. It is employed in a remarkable trans -translation process
to add a C-terminal peptide tag to the incomplete protein product of a
broken mRNA; the tag targets the abnormal protein for proteolysis. tmRNA
sequences have been identified in genomes of diverse bacterial phyla,
including the most deeply branching. They have also been identified in
plastids of the 'red' lineage. The tmRNA Website (http://www.wi.mit.
edu/bartel/tmRNA/home ) contains a database currently including sequences
from 37 species, with provisional alignments, as well as the tentatively
predicted proteolysis tag sequences. A brief review and guide to the
literature is also provided.
ARTICLES
The tmRNA Website
Whitehead Institute for Biomedical Research and Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA. kelly@wi.mit.edu
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