RRC ID 46687
Author Wagner CR, Kuervers L, Baillie DL, Yanowitz JL.
Title xnd-1 regulates the global recombination landscape in Caenorhabditis elegans.
Journal Nature
Abstract Meiotic crossover (CO) recombination establishes physical linkages between homologous chromosomes that are required for their proper segregation into developing gametes, and promotes genetic diversity by shuffling genetic material between parental chromosomes. COs require the formation of double strand breaks (DSBs) to create the substrate for strand exchange. DSBs occur in small intervals called hotspots and significant variation in hotspot usage exists between and among individuals. This variation is thought to reflect differences in sequence identity and chromatin structure, DNA topology and/ or chromosome domain organization. Chromosomes show different frequencies of nondisjunction (NDJ), reflecting inherent differences in meiotic crossover control, yet the underlying basis of these differences remains elusive. Here we show that a novel chromatin factor, X non-disjunction factor 1 (xnd-1), is responsible for the global distribution of COs in C. elegans. xnd-1 is also required for formation of double-strand breaks (DSBs) on the X, but surprisingly XND-1 protein is autosomally enriched. We show that xnd-1 functions independently of genes required for X chromosome-specific gene silencing, revealing a novel pathway that distinguishes the X from autosomes in the germ line, and further show that xnd-1 exerts its effects on COs, at least in part, by modulating levels of H2A lysine 5 acetylation.
Volume 467(7317)
Pages 839-43
Published 2010-10-14
DOI 10.1038/nature09429
PII nature09429
PMID 20944745
PMC PMC3045774
MeSH Acetylation Animals Caenorhabditis elegans / genetics* Caenorhabditis elegans / metabolism* Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism Chromatin / genetics Chromatin / metabolism* Crossing Over, Genetic / genetics* DNA Breaks, Double-Stranded Female Germ Cells / metabolism Histone Acetyltransferases / genetics Histone Acetyltransferases / metabolism Histones / chemistry Histones / metabolism Lysine / metabolism Male Meiosis / genetics* Nondisjunction, Genetic / genetics X Chromosome / genetics
IF 42.779
Times Cited 46
C.elegans tm611 tm2066 tm1621 tm1489 tm2469 tm1630