Journal
JOURNAL OF CELL BIOLOGY
Volume 219, Issue 5, Pages -Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.201910086
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Funding
- National Institutes of Health Office of Research Infrastructure Programs [P40 OD010440]
- National Natural Science Foundation of China [31701176, 31871360, 31730050, 31801137, 31900557]
- National Key R&D Program of China [2017YFA0503500]
- National Institutes of Health [R01GM072551]
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The synaptonemal complex (SC) is an ordered but highly dynamic structure assembled between homologous chromosomes to control interhomologous crossover formation, ensuring accurate meiotic chromosome segregation. However, the mechanisms regulating SC assembly and dynamics remain unclear. Here, we identified two new SC components, SYP-5 and SYP-6, in Caenorhabditis elegans that have distinct expression patterns and form distinct SC assembly units with other SYPs through stable interactions. SYP-5 and SYP-6 exhibit diverse in vivo SC regulatory functions and distinct phase separation properties in cells. Charge-interacting elements (CIEs) are enriched in SC intrinsically disordered regions (IDRs), and IDR deletion or CIE removal confirmed a requirement for these elements in SC regulation. Our data support the theory that multivalent weak interactions between the SC units drive SC formation and that CIEs confer multivalency to the assembly units.
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