Analysis of DNA polymerase activity in vitro using non-radioactive primer extension assay in an automated DNA sequencer
Genet. mol. res. (Online)
;
6(2): 250-255, 2007. ilus, graf
Article
in English
| LILACS
| ID: lil-482046
ABSTRACT
Although different DNA polymerases have distinct functions and substrate affinities, their general mechanism of action is similar. Thus, they can all be studied using the same technical principle, the primer extension assay employing radioactive tags. Even though fluorescence has been used routinely for many years for DNA sequencing, it has not been used in the in vitro primer extension assay. The use of fluorescence labels has obvious advantages over radioactivity, including safety, speed and ease of manipulation. In the present study, we demonstrated the potential of non-radioactive in vitro primer extension for DNA polymerase studies. By using an M13 tag in the substrate, we can use the same fluorescent M13 primer to study different substrate sequences. This technique allows quantification of the DNA polymerase activity of the Klenow fragment using different templates and under different conditions with similar sensitivity to the radioactive assay.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Sequence Analysis, DNA
/
DNA Primers
/
Fluorescein
/
DNA Polymerase I
/
Escherichia coli
Language:
English
Journal:
Genet. mol. res. (Online)
Journal subject:
Molecular Biology
/
Genetics
Year:
2007
Type:
Article
Affiliation country:
Brazil
/
France
Institution/Affiliation country:
Institut de Pharmacologie et de Biologie Structurale/FR
/
Universidade Federal de Minas Gerais/BR
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