Previous Article | Next Article ![]()
Mol. Cell. Biol., 04 1997, 2136-2142, Vol 17, No. 4
ME Budd and JL Campbell
We have recently described a new helicase, the Dna2 helicase, that is
essential for yeast DNA replication. We now show that the yeast FEN-1
(yFEN-1) nuclease interacts genetically and biochemically with Dna2
helicase. FEN-1 is implicated in DNA replication and repair in yeast, and
the mammalian homolog of yFEN-1 (DNase IV, FEN-1, or MF1) participates in
Okazaki fragment maturation. Overproduction of yFEN-1, encoded by
RAD27/RTH1, suppresses the temperature-sensitive growth of dna2-1 mutants.
Overproduction of Dna2 suppresses the rad27/rth1 delta
temperature-sensitive growth defect. dna2-1 rad27/rth1 delta double mutants
are inviable, indicating that the mutations are synthetically lethal. The
genetic interactions are likely due to direct physical interaction between
the two proteins, since both epitope-tagged yFEN-1 and endogenous yFEN-1
coimmunopurify with tagged Dna2. The simplest interpretation of these data
is that one of the roles of Dna2 helicase is associated with processing of
Okazaki fragments.
Copyright © 1997, American Society for Microbiology
A yeast replicative helicase, Dna2 helicase, interacts with yeast FEN-1 nuclease in carrying out its essential function
Braun Laboratories, California Institute of Technology, Pasadena 91125, USA.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»