Enantiomeric bleomycin model compounds bearing long alkyl-chain
摘要:
Enantiomeric bleomycin model compounds bearing long alkyl-chain were synthesized and the physicochemical properties of their metal complexes were studied. The Fe complexes of these compounds exhibited a strong DNA cleaving activity in a chiral discriminative manner.
Enantiomeric bleomycin model compounds bearing long alkyl-chain
摘要:
Enantiomeric bleomycin model compounds bearing long alkyl-chain were synthesized and the physicochemical properties of their metal complexes were studied. The Fe complexes of these compounds exhibited a strong DNA cleaving activity in a chiral discriminative manner.
heterotrimeric G proteins, i.e., members of the G alpha i subfamily. Elongation of the alkyl chain and increasing the number of amino groups enhanced the potency of compounds on HL-60 membrane-bound GTPase. N-(2,5-Diaminopentyl)dodecylamine (21) was selected to study its mode of action employing purified pertussis toxin-sensitive G proteins. It stimulated G alpha subunits by inducing the release of bound GDP
异三聚体G蛋白的新型有效直接活化剂的合成和药理特性进行了描述。使用偶联剂(CDI,DCC和EDC)由受保护的氨基酸与烷基胺合成化合物。对烷基取代的氨基酸酰胺及其相应的二胺和三胺进行结构活性分析。所有化合物均以百日咳毒素敏感的方式激活膜结合的HL-60 GTPases。这表明化合物对异三聚体G蛋白的确定的亚类,即G alpha i亚家族成员的羧基末端具有特定作用。烷基链的延长和氨基数的增加增强了化合物在HL-60膜结合的GTPase上的效力。N-(2,选择了5-二氨基戊基)十二烷基胺(21)来研究其作用方式,该方法利用纯化的百日咳毒素敏感的G蛋白进行研究。它通过诱导结合的GDP释放来刺激Gα亚基。与受体相反,G介导的21α活化不需要Gβγ复合物。在一组Gi亚家族的高度同源成员中观察到了其作用的中等同工型选择性,其中G alpha o1在最低浓度下被激活,而更高的浓度对于刺激G alpha i
Effect of the Carbamoyl Group Attached to an Axial Ligand Portion of a Novel Bleomycin Model on a Dioxygen Activating Reaction.
ligand and a long alkyl chain as the steric factor around the 6th coordination site promoted reversible redox reaction and exhibited high oxygen activating ability. Kinetic analysis of the redox reaction in the presence of dioxygen and a reducing agent revealed that the presence of the carbamoylgroup on the DAPA moiety facilitates the oxygenation-activation process of the Fe(II) complex, and the reduction
Enantiomeric bleomycin model compounds bearing long alkyl-chain were synthesized and the physicochemical properties of their metal complexes were studied. The Fe complexes of these compounds exhibited a strong DNA cleaving activity in a chiral discriminative manner.