2019年6月18日,杨巍教授团队在《细胞报告》( Cell Reports )在线发表了题为“Direct gating of the TRPM2 channel by cADPR via specific interactions with the ADPR binding pocket”的研究论文(https://doi.org/10.1016/j.celrep.2...2019年6月18日,杨巍教授团队在《细胞报告》( Cell Reports )在线发表了题为“Direct gating of the TRPM2 channel by cADPR via specific interactions with the ADPR binding pocket”的研究论文(https://doi.org/10.1016/j.celrep.2019.05.067),揭示了烟酰胺腺嘌呤二核苷酸(NAD)代谢产物环腺苷二磷酸核糖(cADPR)的钙离子调节新机制。近年研究提示,cADPR可能是TRPM2通道激动剂。展开更多
Abscisic acid (ABA) plays an important role in plant growth and developmental processes. Although some ABA signal molecules, such as cADPR, Ca2+, etc., have been reported, there. was no evidence proving the involvemen...Abscisic acid (ABA) plays an important role in plant growth and developmental processes. Although some ABA signal molecules, such as cADPR, Ca2+, etc., have been reported, there. was no evidence proving the involvement of cAMP in A-B-A, signal transduction. In this present study, the constructed gene ( rd29A-GUS) was transformed into Nicotiana tabacum, and calli was induced from the transgenic plant. The suspension cells obtained from the callus grew well and uniformly. Treatment of the suspension cells with ABA led to an increase in GUS activity, indicating that these transgenic suspension cells are useful for the study of ABA signaling. Addition of nicotinamide (cADPR inhibitor) or U-73122 (phospholiphase C inhibitor) could only partially inhibit the increase of GUS activity elicited by ABA. The inhibitory effect of nicotinamide was enhanced by application of K252a (inhibitor of protein kinase). Treatment of the suspension cells with 8-Br-cAMP, a membrane-permeable analogue of cAMP, could partially replace the effect of ABA. Furthermore, intracellular addition of IBMX (phosphodiesterase inhibitor) mimicked die effect of exogenous cAMP on the deduction of expression of rd29A promoter. These results suggested that cAMP was an important messenger in ABA signal transduction in tobacco suspension cell.展开更多
文摘2019年6月18日,杨巍教授团队在《细胞报告》( Cell Reports )在线发表了题为“Direct gating of the TRPM2 channel by cADPR via specific interactions with the ADPR binding pocket”的研究论文(https://doi.org/10.1016/j.celrep.2019.05.067),揭示了烟酰胺腺嘌呤二核苷酸(NAD)代谢产物环腺苷二磷酸核糖(cADPR)的钙离子调节新机制。近年研究提示,cADPR可能是TRPM2通道激动剂。
文摘Abscisic acid (ABA) plays an important role in plant growth and developmental processes. Although some ABA signal molecules, such as cADPR, Ca2+, etc., have been reported, there. was no evidence proving the involvement of cAMP in A-B-A, signal transduction. In this present study, the constructed gene ( rd29A-GUS) was transformed into Nicotiana tabacum, and calli was induced from the transgenic plant. The suspension cells obtained from the callus grew well and uniformly. Treatment of the suspension cells with ABA led to an increase in GUS activity, indicating that these transgenic suspension cells are useful for the study of ABA signaling. Addition of nicotinamide (cADPR inhibitor) or U-73122 (phospholiphase C inhibitor) could only partially inhibit the increase of GUS activity elicited by ABA. The inhibitory effect of nicotinamide was enhanced by application of K252a (inhibitor of protein kinase). Treatment of the suspension cells with 8-Br-cAMP, a membrane-permeable analogue of cAMP, could partially replace the effect of ABA. Furthermore, intracellular addition of IBMX (phosphodiesterase inhibitor) mimicked die effect of exogenous cAMP on the deduction of expression of rd29A promoter. These results suggested that cAMP was an important messenger in ABA signal transduction in tobacco suspension cell.
