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Gonzalo A, Lucas MO, Charpentier C, Sandmann G, Lloyd A, Jenczewski E. Reducing MSH4 copy number prevents meiotic crossovers between non-homologous chromosomes in Brassica napus. Nat Commun 2019; 10:2354. [PMID: 31142748 PMCID: PMC6541637 DOI: 10.1038/s41467-019-10010-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 04/11/2019] [Indexed: 02/06/2023] Open
Abstract
In allopolyploids, correct chromosome segregation requires suppression of non-homologous crossovers while levels of homologous crossovers are ensured. To date, no mechanism able to specifically inhibit non-homologous crossovers has been described in allopolyploids other than in bread wheat. Here, we show that reducing the number of functional copies of MSH4, an essential gene for the main crossover pathway, prevents non-homologous crossovers in allotetraploid Brassica napus. We show that non-homologous crossovers originate almost exclusively from the MSH4-dependent recombination pathway and that their numbers decrease when MSH4 returns to single copy in B. napus; by contrast, homologous crossovers remain unaffected by MSH4 duplicate loss. We also demonstrate that MSH4 systematically returns to single copy following numerous independent polyploidy events, a pattern that is probably not by chance. These results suggest that stabilization of allopolyploid meiosis can be enhanced by loss of a key meiotic recombination gene.
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Affiliation(s)
- Adrián Gonzalo
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000, Versailles, France.,Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK
| | - Marie-Odile Lucas
- INRA UMR1349 Institut de Génétique, Environnement et Protection des Plantes, Le Rheu, 35653, France
| | - Catherine Charpentier
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000, Versailles, France
| | - Greta Sandmann
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000, Versailles, France
| | - Andrew Lloyd
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000, Versailles, France.,Institute of Biological, Environmental, and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3EB, UK
| | - Eric Jenczewski
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000, Versailles, France.
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55
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Ren Y, Chen D, Li W, Zhou D, Luo T, Yuan G, Zeng J, Cao Y, He Z, Zou T, Deng Q, Wang S, Zheng A, Zhu J, Liang Y, Liu H, Wang L, Li P, Li S. OsSHOC1 and OsPTD1 are essential for crossover formation during rice meiosis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 98:315-328. [PMID: 30589140 DOI: 10.1111/tpj.14214] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 12/18/2018] [Accepted: 12/18/2018] [Indexed: 06/09/2023]
Abstract
Meiosis is essential for eukaryotic sexual reproduction and plant fertility, and crossovers (COs) are essential for meiosis and the formation of new allelic combinations in gametes. In this study, we report the isolation of a meiotic gene, OsSHOC1, and the identification of its partner, OsPTD1. Osshoc1 was sterile both in male and female gametophytes, and it showed a striking reduction in the number of meiotic COs, indicating that OsSHOC1 was required for normal CO formation. Further investigations showed that OsSHOC1 physically interacted with OsPTD1 and that the latter was also required for normal CO formation and plant fertility. Additionally, the expression profiles of both genes were consistent with their functions. Our results suggest that OsSHOC1 and OsPTD1 are essential for rice fertility and CO formation, possibly by stabilizing the recombinant intermediates during meiosis.
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Affiliation(s)
- Yun Ren
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- Chongqing Key Laboratory of Economic Plant Biotechnology/Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, China
| | - Dan Chen
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Wenjie Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Dan Zhou
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Tao Luo
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Guoqiang Yuan
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Jing Zeng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Ye Cao
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Zhongshan He
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Ting Zou
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Qiming Deng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Shiquan Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Aiping Zheng
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Jun Zhu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Yueyang Liang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Huainian Liu
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Lingxia Wang
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
| | - Ping Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China
| | - Shuangcheng Li
- State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu, 611130, China
- Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, 611130, Sichuan, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, 410125, China
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58
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Zhang Q, Shao J, Fan HY, Yu C. Evolutionarily-conserved MZIP2 is essential for crossover formation in mammalian meiosis. Commun Biol 2018; 1:147. [PMID: 30272023 PMCID: PMC6155065 DOI: 10.1038/s42003-018-0154-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 08/30/2018] [Indexed: 01/14/2023] Open
Abstract
During meiosis, formation of crossovers-the physical links that ensure the segregation of homologous chromosomes-requires a group of evolutionarily conserved ZMM proteins. In budding yeast, three ZMM proteins, Zip2, Spo16, and Zip4, form a trimeric complex to bind recombination intermediates and promote crossover formation. Here, we show that MZIP2 is the mammalian ortholog of Zip2. Complete ablation of MZIP2 in mice caused sterility in both males and females, as well as defects in repairing meiotic DNA double-strand breaks. MZIP2 forms discrete foci on chromosomes axes, and is required for the localization of TEX11 (mammalian Zip4 ortholog) and another ZMM protein, MSH4, to form crossover-prone recombination intermediates. As a consequence, formation of crossovers is abolished and formation of synaptonemal complex is incomplete in MZIP2-null meiocytes, resulting in meiosis arrest at a zygotene-like stage. Our results suggest that the processing of early recombination intermediates toward mature crossovers is dependent on MZIP2.
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Affiliation(s)
- Qianting Zhang
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-40530, Gothenburg, Sweden
| | - Jingchen Shao
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-40530, Gothenburg, Sweden
| | - Heng-Yu Fan
- Life Sciences Institute, Zhejiang University, Hangzhou, 310058, China
| | - Chao Yu
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-40530, Gothenburg, Sweden.
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59
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Guiraldelli MF, Felberg A, Almeida LP, Parikh A, de Castro RO, Pezza RJ. SHOC1 is a ERCC4-(HhH)2-like protein, integral to the formation of crossover recombination intermediates during mammalian meiosis. PLoS Genet 2018; 14:e1007381. [PMID: 29742103 PMCID: PMC5962103 DOI: 10.1371/journal.pgen.1007381] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 05/21/2018] [Accepted: 04/26/2018] [Indexed: 11/18/2022] Open
Abstract
Chromosome segregation errors during meiosis result in the formation of aneuploid gametes and are the leading cause of pregnancy loss and birth defects in humans. Proper chromosome segregation requires pairwise associations of maternal and paternal homologous chromosomes. Chiasmata, which are the cytological manifestations of crossovers (COs), provide a physical link that holds the homologs together as a pair, facilitating their orientation on the spindle at meiosis I. Although CO-promoting activities ensure a balanced number and position of COs, their identity and mechanism of action in mammals remain understudied. Previous work in yeast and Arabidopsis has shown that Zip2 and Shoc1 are ortholog proteins with an important role in promoting the formation of COs. Our work is the first study in mammals showing the in vivo and in vitro function of mouse and human SHOC1. We show that purified recombinant human SHOC1, an XPF/MUS81 family member, preferentially binds branched DNA molecules but apparently lacks in vitro endonuclease activity, despite its conserved ERCC4-(HhH)2 core structure. Cytological observations suggest that initial steps of recombination are normal in a majority of spermatocytes from SHOC1 hypomorphic mice. However, late stages of recombination appear abnormal, as chromosomal localization of MLH1 is reduced. In agreement, chiasma formation is reduced, and cells arrest at metaphase I with a few lagging chromosomes and subsequent apoptosis. This analysis of SHOC1-deficient mice and the selective localization of SHOC1 to a subset of recombination sites show that SHOC1 acts at key mid-stage steps of the CO formation process. The formation of chromosome axial elements and homologous pairing are apparently normal, but synapsis is altered with SYCP1 frequently failing to extend the full length of the chromosome axes. Finally, we describe that SHOC1 interacts with TEX11, another protein important for the formation of COs, connecting SHOC1 to chromosome axis and structure.
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Affiliation(s)
- Michel F. Guiraldelli
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Anna Felberg
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Luciana P. Almeida
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Aniruddha Parikh
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Rodrigo O. de Castro
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Roberto J. Pezza
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma, United States of America
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