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Microbiol. Rev., Sep 1995, 423-450, Vol 59, No. 3
J Ross
This review concerns how cytoplasmic mRNA half-lives are regulated and how
mRNA decay rates influence gene expression. mRNA stability influences gene
expression in virtually all organisms, from bacteria to mammals, and the
abundance of a particular mRNA can fluctuate manyfold following a change in
the mRNA half-life, without any change in transcription. The processes that
regulate mRNA half-lives can, in turn, affect how cells grow,
differentiate, and respond to their environment. Three major questions are
addressed. Which sequences in mRNAs determine their half-lives? Which
enzymes degrade mRNAs? Which (trans-acting) factors regulate mRNA
stability, and how do they function? The following specific topics are
discussed: techniques for measuring eukaryotic mRNA stability and for
calculating decay constants, mRNA decay pathways, mRNases, proteins that
bind to sequences shared among many mRNAs [like poly(A)- and
AU-rich-binding proteins] and proteins that bind to specific mRNAs (like
the c-myc coding-region determinant-binding protein), how environmental
factors like hormones and growth factors affect mRNA stability, and how
translation and mRNA stability are linked. Some perspectives and
predictions for future research directions are summarized at the end.
Copyright © 1995, American Society for Microbiology
mRNA stability in mammalian cells
McArdle Laboratory for Cancer Research, University of Wisconsin, Madison 53706, USA.
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