δ-Tonoplast intrinsic protein defines unique plant vacuole functions
δ-Tonoplast intrinsic protein defines unique plant vacuole functions
复制标题
DOI：
10.1073/pnas.95.22.12995
复制
发表时间：
1998-10-27
影响因子：
11.1
通讯作者：
Rogers, JC
中科院分区：
文献类型：
--
作者：
Jauh, GY;Fischer, AM;Rogers, JC
植物细胞液泡既有贮藏功能，也有降解功能。营养贮藏蛋白（VSPs）的合成是对伤害和影响碳和氮汇的发育开关的反应。在这里，我们表明，VSP存储在一个独特的类型的液泡，这是来自降解的中央液泡一致插入一个新的液泡膜内在蛋白（TIP），三角洲TIP，到他们的膜。这一发现证明了一个紧密耦合之间的存在delta-TIP和收购的专门存储功能，并表明TIP亚型可能决定液泡身份。
Plant cell vacuoles may have either storage or degradative functions. Vegetative storage proteins (VSPs) are synthesized in response to wounding and to developmental switches that affect carbon and nitrogen sinks. Here we show that VSPs are stored in a unique type of vacuole that is derived from degradative central vacuoles coincident with insertion of a new tonoplast intrinsic protein (TIP), delta-TIP, into their membranes. This finding demonstrates a tight coupling between the presence of delta-TIP and acquisition of a specialized storage function and indicates that TIP isoforms may determine vacuole identity.