A DNA polymerase activity with characteristics of a reverse transcriptase in Podospora anserina.

Abstract:

:In the filamentous ascomycete fungus Podospora anserina, senescence is associated with dramatic changes of the juvenile mitochondrial genome. During senescence specific regions of the non-senescent genome are excised, ligated and amplified as a plasmid. In this paper, we report our studies on nuclear-mitochondrial extracts for the presence of RNA-dependent DNA polymerase activity (reverse transcriptase). In so-called middle aged mycelia of race A, we detected a DNA polymerase possessing properties of a reverse transcriptase. It prefers the ribopolymer templates poly(rA)-oligo(dT)12-18 and poly(rCm)-oligo(dG)12-18 over the deoxypolymer template poly(dA)-oligo(dT)12-18. It also uses natural rabbit globin mRNA as a template. The enzymatic activity can clearly be distinguished from a second DNA polymerase activity found in the same extracts of both young and middle aged mycelia.

journal_name

Curr Genet

journal_title

Current genetics

authors

Steinhilber W,Cummings DJ

doi

10.1007/BF00418411

subject

Has Abstract

pub_date

1986-01-01 00:00:00

pages

389-92

issue

5

eissn

0172-8083

issn

1432-0983

journal_volume

10

pub_type

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