Linked Life Data

11356152

Source:http://linkedlifedata.com/resource/pubmed/id/11356152

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 2
pubmed:dateCreated
2001-5-17
pubmed:abstractText
The NarI sequence represents a strong mutation hot spot for -2 frameshift mutations induced by N-2-acetylaminofluorene (AAF), a strong chemical carcinogen. Only when bound to the third (underlined) guanine (5'-GGCGCC-->GGCC) can AAF trigger frameshift mutations, suggesting the involvement of a slipped replication intermediate with a two-nucleotide bulge. While base substitutions induced by UV light or abasic sites require DNA polymerase V (Pol V; umuDC), the AAF-induced -2 frameshift pathway requires DNA polymerase II, the polB gene product. Interestingly, error-free bypass of the G-AAF adduct requires Pol V. The genes encoding both Pol II and Pol V are induced by the SOS regulon, a co-ordinated cellular response to environmental stress. A given lesion, G-AAF, can thus be bypassed by two SOS-controlled DNA polymerases (II and V), generating mutagenic (-2 frameshifts) and error-free replication products respectively. Therefore both Pol II and Pol V can compete for the blocked replication intermediate in the vicinity of the lesion and engage in replication by transiently replacing the replicative DNA Pol III. Our data suggest that, in order to cope with the large diversity of existing DNA lesions, cells use a single or a combination of translesional DNA polymerases to achieve translesion synthesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0300-5127
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
191-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
DNA polymerases II and V mediate respectively mutagenic (-2 frameshift) and error-free bypass of a single N-2-acetylaminofluorene adduct.
pubmed:affiliation
UPR 9003, CNRS Cancerogenese et Mutagenese Moleculaire et Structurale, ESBS and IRCAD, Strasbourg 67400, France. fuchs@esbs.u-strasb.fr
pubmed:publicationType
Journal Article