Inhibition of folylpolyglutamate synthetase by substrate analogues with an ornithine side chain
作者:Andre Rosowsky、Ronald A. Forsch、Richard G. Moran
DOI:10.1002/jhet.5570330457
日期:1996.7
ability to inhibit folylpolyglutamate synthetase from mouse liver was compared with that of the corresponding 2,4-diamino analogue APA-Orn. Also compared were the inhibitory activities of the deaza analogues 5-deazaAPA-Orn, 8-deazaAPA-Orn, and 5,8-dideazaAPA-Orn, as well as those of Nα-pteroyl-L-ornithine (PteOrn) and its deaza analogues 5-deazaPteOrn and 5,8-dideazaPteOrn. The inhibition constant Ki of
Ñ α - [4 - [[(4- Aminopteridin -6-基)甲基]氨基]苯甲酰基] -L-鸟氨酸(DAPA-Orn)的氨基酸被合成,并且其抑制叶酰聚谷氨酸合成酶能力从小鼠肝脏中与比较相应的2,4-二氨基类似物APA-Orn。也比较有所述脱氮类似物5- deazaAPA-ORN,8- deazaAPA-ORN,和5,8- dideazaAPA-ORN,以及那些的的抑制活性Ñ α -pteroyl -L-鸟氨酸(PteOrn)及其脱氮类似物5-deazaPteOrn和5,8-dideazaPteOrn。抑制常数K idAPA-Orn的α-末端比APA-Orn的末端高7倍,表明2-氨基在与活性位点的结合中起作用。2,4-二氨基化合物的结合亲和力以5-deazaAPA