CLASP interacts with sorting nexin 1 to link microtubules and auxin transport via PIN2 recycling in Arabidopsis thaliana.
Developmental Cell(2013)
摘要
Polarized movement of auxin generates concentration gradients within plant tissues to control cell division patterns and growth direction by modulating microtubule organization. In this study, we identify a reverse mechanism, wherein microtubules influence polar auxin transport. We show that the microtubule-associated protein CLASP interacts with the retromer component sorting nexin 1 (SNX1) to mediate an association between endosomes and microtubules. clasp-1 null mutants display aberrant SNX1 endosomes, as do wild-type plants treated with microtubule-depolymerizing drugs. Consistent with SNX1’s role in trafficking of the auxin efflux carrier PIN-FORMED2 (PIN2), clasp-1 mutant plants have enhanced PIN2 degradation, and PIN2 movement to lytic vacuoles is rapidly induced by depolymerization of microtubules. clasp-1 mutants display aberrant auxin distribution and exhibit numerous auxin-related phenotypes. In addition to mechanistically linking auxin transport and microtubules, our data identify a ubiquitous endosome-microtubule association in plants.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要