RRC ID 6432
Author Penkner AM, Fridkin A, Gloggnitzer J, Baudrimont A, Machacek T, Woglar A, Csaszar E, Pasierbek P, Ammerer G, Gruenbaum Y, Jantsch V.
Title Meiotic chromosome homology search involves modifications of the nuclear envelope protein Matefin/SUN-1.
Journal Cell
Abstract Genome haploidization during meiosis depends on recognition and association of parental homologous chromosomes. The C. elegans SUN/KASH domain proteins Matefin/SUN-1 and ZYG-12 have a conserved role in this process. They bridge the nuclear envelope, connecting the cytoplasm and the nucleoplasm to transmit forces that allow chromosome movement and homolog pairing and prevent nonhomologous synapsis. Here, we show that Matefin/SUN-1 forms rapidly moving aggregates at putative chromosomal attachment sites in the meiotic transition zone (TZ). We analyzed requirements for aggregate formation and identified multiple phosphotarget residues in the nucleoplasmic domain of Matefin/SUN-1. These CHK-2 dependent phosphorylations occur in leptotene/zygotene, diminish during pachytene and are involved in pairing. Mimicking phosphorylation causes an extended TZ and univalents at diakinesis. Our data suggest that the properties of the nuclear envelope are altered during the time window when homologs are sorted and Matefin/SUN-1 aggregates form, thereby controling the movement, homologous pairing and interhomolog recombination of chromosomes.
Volume 139(5)
Pages 920-33
Published 2009-11-25
DOI 10.1016/j.cell.2009.10.045
PII S0092-8674(09)01371-3
PMID 19913286
MeSH Animals Caenorhabditis elegans / cytology* Caenorhabditis elegans / metabolism Caenorhabditis elegans Proteins / chemistry Caenorhabditis elegans Proteins / metabolism* Checkpoint Kinase 2 Chromosome Pairing* Chromosomes / metabolism Meiosis* Meiotic Prophase I Microtubules / metabolism* Mutation Nuclear Envelope / metabolism Phosphorylation Protein Kinases / metabolism Protein Structure, Tertiary Receptors, Cytoplasmic and Nuclear / chemistry Receptors, Cytoplasmic and Nuclear / metabolism* Serine / metabolism
IF 31.398
Times Cited 90
C.elegans tm853