RRC ID 439
Author Walstrom KM, Schmidt D, Bean CJ, Kelly WG.
Title RNA helicase A is important for germline transcriptional control, proliferation, and meiosis in C. elegans.
Journal Mech. Dev.
Abstract RNA helicase A (RHA) is a multifunctional protein with established roles in chromatin regulation. The protein is conserved in worms, Drosophila, and mammals, but its role in worms has not been previously studied. We found that a deletion mutant lacking rha-1 has a temperature-sensitive defect in germline transcriptional silencing, consistent with RHA-1 having a function in transcription regulation. Transcriptional desilencing in these rha-1(tm329) mutants was associated with a loss of lysine 9 methylation on histone H3 that is normally associated with silenced chromatin. Other histone modifications are also mis-localized in the germ cells in the mutants. These defects in histone modifications suggest that there is a general transcription regulation defect in the mutant worms that results in a temperature-sensitive sterile phenotype. At the restrictive temperature, the extent of germ cell mitoses is reduced, and the mutants are sterile due to defects in meiosis and gametogenesis. Our results suggest that RHA-1 is a conserved transcription regulation protein that controls germline proliferation and development in C. elegans.
Volume 122(5)
Pages 707-20
Published 2005-5
DOI 10.1016/j.mod.2004.12.002
PII S0925-4773(04)00282-5
PMID 15817227
MeSH Animals Autoantigens / physiology* Caenorhabditis elegans / physiology* Cell Death Cell Proliferation Chromatin / metabolism DEAD-box RNA Helicases Gene Deletion Gene Expression Regulation, Developmental* Gene Silencing Histones / metabolism Immunohistochemistry In Situ Hybridization Lysine / chemistry Meiosis Methylation Mitosis Models, Genetic Neoplasm Proteins Phenotype RNA / chemistry RNA Helicases / physiology* Reverse Transcriptase Polymerase Chain Reaction Temperature Transcription, Genetic*
IF 1.9
Times Cited 19
C.elegans tm329