Carcinogenesis, Vol 19, 945-949, Copyright © 1998 by Oxford University Press
W Xiao, T Lechler, BL Chow, T Fontanie, M Agustus, KC Carter and YF Wei
The Saccharomyces cerevisiae REV3 gene encodes the catalytic subunit of a
non-essential DNA polymerase zeta, which is required for mutagenesis. The
rev3 mutants significantly reduce both spontaneous and DNA damage- induced
mutation rates. We have identified human cDNA clones from two different
libraries whose deduced amino acid sequences bear remarkable homology to
the yeast Rev3, and named this gene hREV3. The hREV3 gene was mapped to
chromosome 1p32-33 by fluorescence in situ hybridization. The hREV3 encodes
an mRNA of >10 kb, and its expression varies in different tissues and
appears to be elevated in some but not all of the tumor cell lines we have
examined. In light of recent reports of a putative mouse REV3, these
results indicate that mammalian cells may also contain a mutagenic pathway
which aids in cell survival at the cost of increased mutation.
ARTICLES
Identification, chromosomal mapping and tissue-specific expression of hREV3 encoding a putative human DNA polymerase zeta
Department of Microbiology, University of Saskatchewan, Saskatoon, Canada. xiaow@sask.usask.ca
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