Arabidopsis Argonaute10 specifically sequesters miR166/165 to regulate shoot apical meristem development.
Arabidopsis Argonaute10 specifically sequesters miR166/165 to regulate shoot apical meristem development.
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DOI:
10.1016/j.cell.2011.03.024
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发表时间:
2011-04-15
期刊:
影响因子:
64.5
通讯作者:
Zhang X
中科院分区:
文献类型:
--
作者:
Zhu H;Hu F;Wang R;Zhou X;Sze SH;Liou LW;Barefoot A;Dickman M;Zhang X
The shoot apical meristem (SAM) comprises a group of undifferentiated cells that divide to maintain the meristem and also give rise to all plant shoot organs. SAM fate is specified by HOMEODOMAIN-LEUCINE ZIPPER (HD-ZIP) transcription factors, which are targets of miR166/165. In Arabidopsis, AGO10 is a critical regulator of SAM maintenance, but the mechanism of regulation remains unknown. Here we demonstrate that AGO10 specifically recruits miR166/165. The AGO10-miR166/165 association is determined by the distinct structure of the miR166/165 duplex. Deficient loading of miR166 into AGO10 results in a defective SAM. AGO10 has a higher binding affinity for miR166 than does AGO1, a master repressor for miRNA targets. Notably, the miR166/165-binding ability of AGO10, but not its catalytic activity, is required for SAM development. We propose that AGO10 functions as a decoy for miR166/165 to maintain the SAM, preventing their incorporation into AGO1 complexes and the subsequent repression of HD-ZIP gene expression.
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影响因子:
11.4
作者:
Moussian, B;Schoof, H;Laux, T
通讯作者:
Laux, T
影响因子:
56.9
作者:
Song, JJ;Smith, SK;Joshua-Tor, L
通讯作者:
Joshua-Tor, L
影响因子:
11.4
作者:
Mallory, AC;Reinhart, BJ;Bartel, DP
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Bartel, DP
影响因子:
64.5
作者:
Foerstemann, Klaus;Horwich, Michael D.;Zamore, Phillip D.
通讯作者:
Zamore, Phillip D.
DOI:
10.1126/science.1190809
发表时间:
2010-06-25
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Cifuentes D;Xue H;Taylor DW;Patnode H;Mishima Y;Cheloufi S;Ma E;Mane S;Hannon GJ;Lawson ND;Wolfe SA;Giraldez AJ
通讯作者:
Giraldez AJ