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PMID:20711356

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Citation

Roig, I, Dowdle, JA, Toth, A, de Rooij, DG, Jasin, M and Keeney, S (2010) Mouse TRIP13/PCH2 is required for recombination and normal higher-order chromosome structure during meiosis. PLoS Genet. 6

Abstract

Accurate chromosome segregation during meiosis requires that homologous chromosomes pair and become physically connected so that they can orient properly on the meiosis I spindle. These connections are formed by homologous recombination closely integrated with the development of meiosis-specific, higher-order chromosome structures. The yeast Pch2 protein has emerged as an important factor with roles in both recombination and chromosome structure formation, but recent analysis suggested that TRIP13, the mouse Pch2 ortholog, is not required for the same processes. Using distinct Trip13 alleles with moderate and severe impairment of TRIP13 function, we report here that TRIP13 is required for proper synaptonemal complex formation, such that autosomal bivalents in Trip13-deficient meiocytes frequently displayed pericentric synaptic forks and other defects. In males, TRIP13 is required for efficient synapsis of the sex chromosomes and for sex body formation. Furthermore, the numbers of crossovers and chiasmata are reduced in the absence of TRIP13, and their distribution along the chromosomes is altered, suggesting a role for TRIP13 in aspects of crossover formation and/or control. Recombination defects are evident very early in meiotic prophase, soon after DSB formation. These findings provide evidence for evolutionarily conserved functions for TRIP13/Pch2 in both recombination and formation of higher order chromosome structures, and they support the hypothesis that TRIP13/Pch2 participates in coordinating these key aspects of meiotic chromosome behavior.

Links

PubMed PMC2920839 Online version:10.1371/journal.pgen.1001062

Keywords

Adenosine Triphosphatases/genetics; Adenosine Triphosphatases/metabolism; Animals; Cell Cycle Proteins/genetics; Cell Cycle Proteins/metabolism; Cell Line; Chromosome Segregation; Chromosomes, Mammalian/genetics; Chromosomes, Mammalian/metabolism; Crossing Over, Genetic; Evolution, Molecular; Female; Male; Meiosis; Mice/genetics; Mice/metabolism; Mice, Inbred C57BL; Mice, Knockout; Nuclear Proteins/genetics; Nuclear Proteins/metabolism; Recombination, Genetic; Saccharomyces cerevisiae Proteins/genetics; Saccharomyces cerevisiae Proteins/metabolism; Saccharomycetales/cytology; Saccharomycetales/genetics; Saccharomycetales/metabolism; Synaptonemal Complex/genetics; Synaptonemal Complex/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

MOUSE:PCH2

involved_in

GO:0007283: spermatogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

MOUSE:PCH2

involved_in

GO:0007131: reciprocal meiotic recombination

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

MOUSE:PCH2

involved_in

GO:0007130: synaptonemal complex assembly

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

MOUSE:PCH2

involved_in

GO:0006302: double-strand break repair

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

MOUSE:PCH2

involved_in

GO:0048477: oogenesis

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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