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MEKK3 Coordinates with FBW7 to Regulate WDR62 Stability and Neurogenesis
Dan Xu, Minghui Yao, Yaqing Wang, Ling Yuan, Joerg D. Hoeck, Jingwen Yu, Liang Liu, Yvonne Y. C. Yeap, Weiya Zhang, Feng Zhang, Yinghang Feng, Tiantian Ma, Yujie Wang, Dominic C. H. Ng, Xiaoyin Niu, Bing Su, Axel Behrens , Zhiheng Xu
PLoS Biology
Abstract
Mutations of WD repeat domain 62 (WDR62) lead to autosomal recessive primary microcephaly (MCPH), and down-regulation of WDR62 expression causes the loss of neural progenitor cells (NPCs). However, how WDR62 is regulated and hence controls neurogenesis and brain size remains elusive. Here, we demonstrate that mitogen-activated protein kinase kinase kinase 3 (MEKK3) forms a complex with WDR62 to promote c-Jun N-terminal kinase (JNK) signaling synergistically in the control of neurogenesis. The deletion of Mekk3, Wdr62, or Jnk1 resulted in phenocopied defects, including premature NPC differentiation. We further showed that WDR62 protein is positively regulated by MEKK3 and JNK1 in the developing brain and that the defects of wdr62 deficiency can be rescued by the transgenic expression of JNK1. Meanwhile, WDR62 is also negatively regulated by T1053 phosphorylation, leading to the recruitment of F-box and WD repeat domain-containing protein 7 (FBW7) and proteasomal degradation. Our findings demonstrate that the coordinated reciprocal and bidirectional regulation among MEKK3, FBW7, WDR62, and JNK1, is required for fine-tuned JNK signaling for the control of balanced NPC self-renewal and differentiation during cortical development.
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论文编号: |
10.1371/journal.pbio.2006613 |
论文题目: |
MEKK3 Coordinates with FBW7 to Regulate WDR62 Stability and Neurogenesis |
英文论文题目: |
MEKK3 Coordinates with FBW7 to Regulate WDR62 Stability and Neurogenesis |
第一作者: |
Dan Xu, Minghui Yao, Yaqing Wang, Ling Yuan, Joerg D. Hoeck, Jingwen Yu, Liang Liu, Yvonne Y. C. Yeap, Weiya Zhang, Feng Zhang, Yinghang Feng, Tiantian Ma, Yujie Wang, Dominic C. H. Ng, Xiaoyin Niu, Bing Su, Axel Behrens , Zhiheng Xu |
英文第一作者: |
Dan Xu, Minghui Yao, Yaqing Wang, Ling Yuan, Joerg D. Hoeck, Jingwen Yu, Liang Liu, Yvonne Y. C. Yeap, Weiya Zhang, Feng Zhang, Yinghang Feng, Tiantian Ma, Yujie Wang, Dominic C. H. Ng, Xiaoyin Niu, Bing Su, Axel Behrens , Zhiheng Xu |
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2018-12-26 |
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摘要: |
Mutations of WD repeat domain 62 (WDR62) lead to autosomal recessive primary microcephaly (MCPH), and down-regulation of WDR62 expression causes the loss of neural progenitor cells (NPCs). However, how WDR62 is regulated and hence controls neurogenesis and brain size remains elusive. Here, we demonstrate that mitogen-activated protein kinase kinase kinase 3 (MEKK3) forms a complex with WDR62 to promote c-Jun N-terminal kinase (JNK) signaling synergistically in the control of neurogenesis. The deletion of Mekk3, Wdr62, or Jnk1 resulted in phenocopied defects, including premature NPC differentiation. We further showed that WDR62 protein is positively regulated by MEKK3 and JNK1 in the developing brain and that the defects of wdr62 deficiency can be rescued by the transgenic expression of JNK1. Meanwhile, WDR62 is also negatively regulated by T1053 phosphorylation, leading to the recruitment of F-box and WD repeat domain-containing protein 7 (FBW7) and proteasomal degradation. Our findings demonstrate that the coordinated reciprocal and bidirectional regulation among MEKK3, FBW7, WDR62, and JNK1, is required for fine-tuned JNK signaling for the control of balanced NPC self-renewal and differentiation during cortical development. |
英文摘要: |
Mutations of WD repeat domain 62 (WDR62) lead to autosomal recessive primary microcephaly (MCPH), and down-regulation of WDR62 expression causes the loss of neural progenitor cells (NPCs). However, how WDR62 is regulated and hence controls neurogenesis and brain size remains elusive. Here, we demonstrate that mitogen-activated protein kinase kinase kinase 3 (MEKK3) forms a complex with WDR62 to promote c-Jun N-terminal kinase (JNK) signaling synergistically in the control of neurogenesis. The deletion of Mekk3, Wdr62, or Jnk1 resulted in phenocopied defects, including premature NPC differentiation. We further showed that WDR62 protein is positively regulated by MEKK3 and JNK1 in the developing brain and that the defects of wdr62 deficiency can be rescued by the transgenic expression of JNK1. Meanwhile, WDR62 is also negatively regulated by T1053 phosphorylation, leading to the recruitment of F-box and WD repeat domain-containing protein 7 (FBW7) and proteasomal degradation. Our findings demonstrate that the coordinated reciprocal and bidirectional regulation among MEKK3, FBW7, WDR62, and JNK1, is required for fine-tuned JNK signaling for the control of balanced NPC self-renewal and differentiation during cortical development. |
刊物名称: |
PLoS Biology |
英文刊物名称: |
PLoS Biology |
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其它备注: |
Dan Xu, Minghui Yao, Yaqing Wang, Ling Yuan, Joerg D. Hoeck, Jingwen Yu, Liang Liu, Yvonne Y. C. Yeap, Weiya Zhang, Feng Zhang, Yinghang Feng, Tiantian Ma, Yujie Wang, Dominic C. H. Ng, Xiaoyin Niu, Bing Su, Axel Behrens, Zhiheng Xu. MEKK3 Coordinates with FBW7 to Regulate WDR62 Stability and Neurogenesis. PLoS Biology. 10.1371/journal.pbio.2006613 |
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