Phosphatidic acid inhibits SCAB1-mediated F-actin bundling in Arabidopsis.
Phosphatidic acid inhibits SCAB1-mediated F-actin bundling in Arabidopsis.
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磷脂酸抑制拟南芥中 SCAB1 介导的 F-肌动蛋白成束
DOI:
10.1080/15592324.2022.2092346
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发表时间:
2023-12-31
影响因子:
2.9
通讯作者:
Yang, Yongqing
中科院分区:
文献类型:
--
作者:
Fu, Haiqi;Yang, Xinhao;Hao, Rong;Han, Xiuli;Song, Shu;Guo, Yan;Yang, Yongqing
Stomatal closure-associated actin-binding protein 1 (SCAB1) regulates stomatal closure by mediating actin filament reorganization in Arabidopsis thaliana. Our previous study showed that phosphatidylinositol 3-phosphate (PI3P) binds to SCAB1 and inhibits its oligomerization, thereby inhibiting its activity on F-actin in guard cells during stomatal closure. In this study, we show that another phospholipid, phosphatidic acid (PA), also binds to SCAB1 and inhibits its actin-bundling activity but not its actin-binding activity. F-actin bundling was promoted in vivo by treating Col-0 seedlings with n-butanol, a suppressor of PA production, but this effect was absent in the scab1 mutant. These results indicate that the signaling molecule PA is involved in the modulation of SCAB1 activity in F-actin reorganization.
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