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2014 ; 28
(9
): 3832-40
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Deoxyribonucleotides as genetic and metabolic regulators
#MMPMID24928192
Mathews CK
FASEB J
2014[Sep]; 28
(9
): 3832-40
PMID24928192
show ga
For >35 yr, we have known that the accuracy of DNA replication is controlled in
large part by the relative concentrations of the 4 canonical deoxyribonucleoside
5'-triphosphates (dNTPs) at the replisome. Since this field was last reviewed, ?8
yr ago, there has been increased understanding of the mutagenic pathways as they
occur in living cells. At the same time, aspects of deoxyribonucleotide
metabolism have been shown to be critically involved in processes as diverse as
cell cycle control, protooncogene expression, cellular defense against HIV
infection, replication rate control, telomere length control, and mitochondrial
function. Evidence supports a relationship between dNTP pools and microsatellite
repeat instability. Relationships between dNTP synthesis and breakdown in
controlling steady-state pools have become better defined. In addition, new
experimental approaches have allowed definitive analysis of mutational pathways
induced by dNTP pool abnormalities, both in Escherichia coli and in yeast.
Finally, ribonucleoside triphosphate (rNTP) pools have been shown to be critical
determinants of DNA replication fidelity. These developments are discussed in
this review article.