Applying the patch-clamp technique to vacuoles from Radish we studied the effects of Cu2+ on Slow Vacuolar (SV) current’s characteristic. Our results show that Cu2+ in bath solution at higher concentration inhibits S...Applying the patch-clamp technique to vacuoles from Radish we studied the effects of Cu2+ on Slow Vacuolar (SV) current’s characteristic. Our results show that Cu2+ in bath solution at higher concentration inhibits SV currents and the percentage of inhibition increases with increasing concentration and changes with different voltage. When at lower concentration, Cu2+ significantly promotes the SV currents and the promotion ratio decrease with increasing voltage. At the same time, the time constants of activation become lesser after adding Cu2+. These results show that there may be some Cu2+ binding sites on SV channels and binding to which can change SV current’s characteristic.展开更多
Plants and animals in endosomes operate TPCI/SV-type cation channels. All plants harbor at least one TPC1 gene. Although the encoded SV channel was firstly discovered in the plant vacuole membrane two decades ago, its...Plants and animals in endosomes operate TPCI/SV-type cation channels. All plants harbor at least one TPC1 gene. Although the encoded SV channel was firstly discovered in the plant vacuole membrane two decades ago, its biological function has remained enigmatic. Recently, the structure of a plant TPC1/SV channel protein was determined. Insights into the 3D topology has now guided site-directed mutation ap- proaches, enabling structure-function analyses of TPC1/SV channels to shed new light on earlier findings. Fou2 plants carrying a hyperactive mutant form of TPC1 develop wounding stress phenotypes. Recent studies with fou2 and mutants that lack functional TPC1 have revealed atypical features in local and long-distance stress signaling, providing new access to the previously mysterious biology of this vacuolar cation channel type in planta.展开更多
基金supported by the National Key Research and Development Program of China(2021YFA1501500)the National Natural Science Foundation of China(22033008,22220102005,and 22171265)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZZ103).
文摘催化剂与助催化剂之间的低电荷分离效率严重限制了光催化性能.催化剂与助催化剂之间的强界面相互作用可以提高电荷分离效率.通过引入界面化学键增强组分间的界面相互作用是提高光催化性能的有效手段之一.本文合成了ZnIn_(2)S_(4)(ZIS)/Sv-MoS_(2)光催化剂,ZIS中的S原子与Sv-MoS_(2)中未配位Mo原子之间的键合作用形成了界面Mo–S键,这极大地提高了ZIS的光催化活性.采用不同的NaBH4蚀刻时间制备了MoS_(2-x)h.优化后的Z I S/MoS_(2)-4 h复合材料的产氢速率为7.6 mmol g^(−1)h^(−1),是原ZIS(1.6 mmol g^(−1)h^(−1))的4.75倍,是ZIS/MoS_(2)(3.7 mmol g^(−1)h^(−1))的2.05倍.非凡的光催化活性可归因于光生电子在Mo–S键的作用下更容易从ZIS转移到MoS_(2).光电测量表明,ZIS/MoS_(2)-4h具有有效的电荷转移.本工作揭示了引入界面化学键对ZIS/MoS_(2)光催化活性的影响,为通过界面工程设计优良的助催化剂提供了一种简单有效的方法.
基金support by the National Natural Science Foun-dation of China(Grant No.20637010)the Shanxi Pro-vincial Natural Science Foundation for Youth(Grant No.20041032).
文摘Applying the patch-clamp technique to vacuoles from Radish we studied the effects of Cu2+ on Slow Vacuolar (SV) current’s characteristic. Our results show that Cu2+ in bath solution at higher concentration inhibits SV currents and the percentage of inhibition increases with increasing concentration and changes with different voltage. When at lower concentration, Cu2+ significantly promotes the SV currents and the promotion ratio decrease with increasing voltage. At the same time, the time constants of activation become lesser after adding Cu2+. These results show that there may be some Cu2+ binding sites on SV channels and binding to which can change SV current’s characteristic.
文摘Plants and animals in endosomes operate TPCI/SV-type cation channels. All plants harbor at least one TPC1 gene. Although the encoded SV channel was firstly discovered in the plant vacuole membrane two decades ago, its biological function has remained enigmatic. Recently, the structure of a plant TPC1/SV channel protein was determined. Insights into the 3D topology has now guided site-directed mutation ap- proaches, enabling structure-function analyses of TPC1/SV channels to shed new light on earlier findings. Fou2 plants carrying a hyperactive mutant form of TPC1 develop wounding stress phenotypes. Recent studies with fou2 and mutants that lack functional TPC1 have revealed atypical features in local and long-distance stress signaling, providing new access to the previously mysterious biology of this vacuolar cation channel type in planta.
