Crossover localisation is regulated by the neddylation posttranslational regulatory pathway
In: ISSN: 1544-9173, 2014
Online
academicJournal
Zugriff:
Crossovers (COs) are at the origin of genetic variability, occurring across successive generations, and they are also essential for the correct segregation of chromosomes during meiosis. Their number and position are precisely controlled, however the mechanisms underlying these controls are poorly understood. Neddylation/rubylation is a regulatory pathway of posttranslational protein modification that is required for numerous cellular processes in eukaryotes, but has not yet been linked to homologous recombination. In a screen for meiotic recombination-defective mutants, we identified several axr1 alleles, disrupting the gene encoding the E1 enzyme of the neddylation complex in Arabidopsis. Using genetic and cytological approaches we found that axr1 mutants are characterised by a shortage in bivalent formation correlated with strong synapsis defects. We determined that the bivalent shortage in axr1 is not due to a general decrease in CO formation but rather due to a mislocalisation of class I COs. In axr1, as in wild type, COs are still under the control of the ZMM group of proteins. However, in contrast to wild type, they tend to cluster together and no longer follow the obligatory CO rule. Lastly, we showed that this deregulation of CO localisation is likely to be mediated by the activity of a cullin 4 RING ligase, known to be involved in DNA damage sensing during somatic DNA repair and mouse spermatogenesis. In conclusion, we provide evidence that the neddylation/rubylation pathway of protein modification is a key regulator of meiotic recombination. We propose that rather than regulating the number of recombination events, this pathway regulates their localisation, through the activation of cullin 4 RING ligase complexes. Possible targets for these ligases are discussed.
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Crossover localisation is regulated by the neddylation posttranslational regulatory pathway
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Autor/in / Beteiligte Person: | Tagliaro Jahns, Marina ; Vezon, Daniel ; Chambon, Aurélie ; Pereira, Lucie ; Falque, Matthieu ; Martin, Olivier ; Chelysheva, Liudmila ; Grelon, Mathilde ; Institut Jean-Pierre Bourgin (IJPB) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech ; Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon) ; Institut National de la Recherche Agronomique (INRA)-Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) ; ANR (Agence Nationale pour la Recherche) ; INRA PhD fellowship (Contrat Jeune Scientifique, CJS) |
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Zeitschrift: | ISSN: 1544-9173, 2014 |
Veröffentlichung: | HAL CCSD ; Public Library of Science, 2014 |
Medientyp: | academicJournal |
DOI: | 10.1371/journal.pbio.1001930 |
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