Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
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SHR Neuro Krebs Kardio Lipid Stoffw Microb
Smolikov, S; Eizinger, A; Schild-Prufert, K; Hurlburt, A; McDonald, K; Engebrecht, J; Villeneuve, AM; Colaiácovo, MP.
SYP-3 restricts synaptonemal complex assembly to bridge paired chromosome axes during meiosis in Caenorhabditis elegans.
Genetics. 2007; 176(4): 2015-2025.
Doi: 10.1534/genetics.107.072413
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- Schild Kristina
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- Abstract:
- Synaptonemal complex (SC) formation must be regulated to occur only between aligned pairs of homologous chromosomes, ultimately ensuring proper chromosome segregation in meiosis. Here we identify SYP-3, a coiled-coil protein that is required for assembly of the central region of the SC and for restricting its loading to occur only in an appropriate context, forming structures that bridge the axes of paired meiotic chromosomes in Caenorhabditis elegans. We find that inappropriate loading of central region proteins interferes with homolog pairing, likely by triggering a premature change in chromosome configuration during early prophase that terminates the search for homologs. As a result, syp-3 mutants lack chiasmata and exhibit increased chromosome mis-segregation. Altogether, our studies lead us to propose that SYP-3 regulates synapsis along chromosomes, contributing to meiotic progression in early prophase.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Base Sequence -
- Caenorhabditis elegans - genetics Caenorhabditis elegans - physiology Caenorhabditis elegans - ultrastructure
- Caenorhabditis elegans Proteins - genetics Caenorhabditis elegans Proteins - physiology
- Chromosome Pairing - genetics Chromosome Pairing - physiology
- Chromosome Segregation - genetics Chromosome Segregation - physiology
- DNA Primers - genetics
- DNA, Helminth - genetics
- Genes, Helminth -
- Meiosis - genetics Meiosis - physiology
- Models, Genetic -
- Mutation -
- Synaptonemal Complex - genetics Synaptonemal Complex - physiology Synaptonemal Complex - ultrastructure