作者:Charles W. Parker、Barrie Entsch、David S. Letham
DOI:10.1016/s0031-9422(00)85471-0
日期:1986.1
3-methyl-7-n-pentylaminopyrazolo[4,3-d]pyrimidine, which acted competitively (Ki, 22 μM), and the diaminopurine, 6-benzylamino-2-(2-hydroxyethylamino)-9-methylpurine (Ki, 3.3 μM). However these compounds were ineffective as inhibitors of the cytokinin-alanine synthase which was inhibited competitively by IAA (Ki 70 μM) and related compounds, especially 5,7-dichloro-IAA (Ki 0.4 μM). Certain urea derivatives were moderately
摘要 抑制细胞分裂素自然代谢失活的化合物具有重要的生理意义。在这项研究中,发现了两种酶的抑制剂,它们形成细胞分裂素碱基的葡萄糖和丙氨酸结合物,即细胞分裂素 7-葡萄糖基转移酶和 β-(9-细胞分裂素)丙氨酸合酶。对前一种酶发现的最有效抑制剂是细胞分裂素类似物 3-methyl-7-n-pentylaminopyrazolo[4,3-d]pyrimidine,它具有竞争性(Ki,22 μM)和二氨基嘌呤,6-benzylamino-2 -(2-羟乙基氨基)-9-甲基嘌呤 (Ki, 3.3 μM)。然而,这些化合物作为细胞分裂素-丙氨酸合酶的抑制剂无效,该酶被 IAA (Ki 70 μM) 和相关化合物,尤其是 5,7-二氯-IAA (Ki 0.4 μM) 竞争性抑制。