MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment.
MAPK-activated protein kinase 2 (MK2), a direct substrate of p38 MAPK, plays key roles in multiple physiological functions in mitosis. Here, we show for the first time the unique distribution pattern of MK2 in meiosis. Phospho-MK2 was localized on bipolar spindle minus ends and along the interstitia...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2010-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC2893158?pdf=render |
| _version_ | 1819082896825122816 |
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| author | Ju Yuan Bao-Zeng Xu Shu-Tao Qi Jing-Shan Tong Liang Wei Mo Li Ying-Chun Ouyang Yi Hou Heide Schatten Qing-Yuan Sun |
| author_facet | Ju Yuan Bao-Zeng Xu Shu-Tao Qi Jing-Shan Tong Liang Wei Mo Li Ying-Chun Ouyang Yi Hou Heide Schatten Qing-Yuan Sun |
| author_sort | Ju Yuan |
| collection | DOAJ |
| description | MAPK-activated protein kinase 2 (MK2), a direct substrate of p38 MAPK, plays key roles in multiple physiological functions in mitosis. Here, we show for the first time the unique distribution pattern of MK2 in meiosis. Phospho-MK2 was localized on bipolar spindle minus ends and along the interstitial axes of homologous chromosomes extending over centromere regions and arm regions at metaphase of first meiosis (MI stage) in mouse oocytes. At metaphase of second meiosis (MII stage), p-MK2 was localized on the bipolar spindle minus ends and at the inner centromere region of sister chromatids as dots. Knockdown or inhibition of MK2 resulted in spindle defects. Spindles were surrounded by irregular nondisjunction chromosomes, which were arranged in an amphitelic or syntelic/monotelic manner, or chromosomes detached from the spindles. Kinetochore-microtubule attachments were impaired in MK2-deficient oocytes because spindle microtubules became unstable in response to cold treatment. In addition, homologous chromosome segregation and meiosis progression were inhibited in these oocytes. Our data suggest that MK2 may be essential for functional meiotic bipolar spindle formation, chromosome segregation and proper kinetochore-microtubule attachments. |
| first_indexed | 2024-12-21T20:23:58Z |
| format | Article |
| id | doaj.art-32c7dfddf50746b8b7065c4897f702be |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T20:23:58Z |
| publishDate | 2010-01-01 |
| publisher | Public Library of Science (PLoS) |
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| spelling | doaj.art-32c7dfddf50746b8b7065c4897f702be2022-12-21T18:51:26ZengPublic Library of Science (PLoS)PLoS ONE1932-62032010-01-0156e1124710.1371/journal.pone.0011247MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment.Ju YuanBao-Zeng XuShu-Tao QiJing-Shan TongLiang WeiMo LiYing-Chun OuyangYi HouHeide SchattenQing-Yuan SunMAPK-activated protein kinase 2 (MK2), a direct substrate of p38 MAPK, plays key roles in multiple physiological functions in mitosis. Here, we show for the first time the unique distribution pattern of MK2 in meiosis. Phospho-MK2 was localized on bipolar spindle minus ends and along the interstitial axes of homologous chromosomes extending over centromere regions and arm regions at metaphase of first meiosis (MI stage) in mouse oocytes. At metaphase of second meiosis (MII stage), p-MK2 was localized on the bipolar spindle minus ends and at the inner centromere region of sister chromatids as dots. Knockdown or inhibition of MK2 resulted in spindle defects. Spindles were surrounded by irregular nondisjunction chromosomes, which were arranged in an amphitelic or syntelic/monotelic manner, or chromosomes detached from the spindles. Kinetochore-microtubule attachments were impaired in MK2-deficient oocytes because spindle microtubules became unstable in response to cold treatment. In addition, homologous chromosome segregation and meiosis progression were inhibited in these oocytes. Our data suggest that MK2 may be essential for functional meiotic bipolar spindle formation, chromosome segregation and proper kinetochore-microtubule attachments.http://europepmc.org/articles/PMC2893158?pdf=render |
| spellingShingle | Ju Yuan Bao-Zeng Xu Shu-Tao Qi Jing-Shan Tong Liang Wei Mo Li Ying-Chun Ouyang Yi Hou Heide Schatten Qing-Yuan Sun MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. PLoS ONE |
| title | MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. |
| title_full | MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. |
| title_fullStr | MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. |
| title_full_unstemmed | MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. |
| title_short | MAPK-activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore-microtubule attachment. |
| title_sort | mapk activated protein kinase 2 is required for mouse meiotic spindle assembly and kinetochore microtubule attachment |
| url | http://europepmc.org/articles/PMC2893158?pdf=render |
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