Hrp3, a chromodomain helicase/ATPase DNA binding protein, is required for heterochromatin silencing in fission yeast.

Abstract:

:Hrp3, a paralog of Hrp1, is a novel member of the CHD1 (chromo-helicase/ATPase-DNA binding 1) protein family of Schizosaccharomyces pombe. Although it has been considered that CHD1 proteins are required for chromatin modifications in transcriptional regulations, little is known about their roles in vivo. In this study, we examined the effects of Hrp3 on heterochromatin silencing using several S. pombe reporter strains. The phenotypic analysis revealed that hrp3(+) is not an essential gene for cell viability. However, Hrp3 is required for transcriptional repression at silence loci of mat3. A chromatin immunoprecipitation assay showed that Hrp3 directly associates with mat3 chromatin. Thus, our results strongly suggest that Hrp3 is involved in heterochromatin silencing and plays a direct role as a chromatin remodeling factor at mat3 in vivo.

authors

Jae Yoo E,Kyu Jang Y,Ae Lee M,Bjerling P,Bum Kim J,Ekwall K,Hyun Seong R,Dai Park S

doi

10.1016/s0006-291x(02)00797-0

subject

Has Abstract

pub_date

2002-07-26 00:00:00

pages

970-4

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006291X02007970

journal_volume

295

pub_type

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