Screening and characterization of an inhibitory chemical specific to Arabidopsis gibberellin 2-oxidases
作者:Masato Otani、Jung-Min Yoon、Seung-Hyun Park、Tadao Asami、Masatoshi Nakajima
DOI:10.1016/j.bmcl.2010.05.015
日期:2010.7
The hydroxylation of gibberellin (GA) at the 2-position is known as the major cause of inactivation of GAs, whose reaction is catalyzed by 2-oxoglutarate dependent dioxygenases, also termed GA 2-oxidases (GA2oxs). To block GA catabolism in plants, a few chemicals can be used. To obtain novel inhibitors specific to GA2oxs, we performed in vitro random screenings by using 3H-16,17-dihydro-GA4 and recombinant
赤霉素(GA)在2位上的羟基化被认为是GA失活的主要原因,其反应是由2-氧戊二酸酯依赖性双加氧酶(也称为GA 2-氧化酶(GA2oxs))催化的。为了阻止植物中的GA分解代谢,可以使用一些化学物质。为了获得特异性针对GA2oxs的新型抑制剂,我们使用3 H-16,17-dihydro-GA 4和重组拟南芥GA2ox2进行了体外随机筛选。结果,一个候选物是甲基6 - c hloro-3 H -1,2,3- b恩佐迪t噻唑-4- c从筛选中选择2-氧化亚烷基氧基化物(CBTC),并对其进行体内评估。CBTC促进了拟南芥幼苗的发芽和伸长。这有力地表明,CBTC具有很高的特异性抑制拟南芥中的GA2oxs。