Specificities of Calreticulin Transacetylase to acetoxy derivatives of 3-alkyl-4-methylcoumarins: Effect on the activation of nitric oxide synthase
作者:Abha Kathuria、Anjali Gupta、Nivedita Priya、Prabhjot Singh、Hanumantharao G. Raj、Ashok K. Prasad、Virinder S. Parmar、Sunil K. Sharma
DOI:10.1016/j.bmc.2009.01.003
日期:2009.2
the C-3 position of the acetoxy coumarins on the CRTAase activity. The substitution at C-3 position of coumarin nucleus resulted in the reduction of CRTAase activity and related effects. Accordingly the formation of NO in platelets by C-3 alkyl substituted acetoxy coumarins was found to be much less compared to the unsubstituted analogs. In addition the alkyl substitution at C-3 position exhibited the
钙网蛋白转乙酰酶(CRTAase)催化乙酰基从多酚乙酸酯(PAs)转移至受体蛋白并调节其生物学活性。通过对胞质谷胱甘肽S的不可逆抑制可以方便地测定CRTAase-乙酰转移酶(GST)由模型乙酰氧基香豆素,7,8-二乙酰氧基-4-甲基香豆素(DAMC)制成。我们之前已经研究过乙酰氧基对苯环的影响,C-3和C-4位双键还原的影响,C-4位甲基/苯基的影响以及C-4位的影响。苯并吡喃核中相对于氧杂原子的羰基,具有CRTAase的催化活性。在本次交流中,我们扩展了以前的工作;其中我们研究了乙酰氧基香豆素C-3位置的烷基(乙基,己基和癸基)对CRTAase活性的影响。香豆素核的C-3位取代导致CRTAase活性降低和相关作用。因此,发现与未取代的类似物相比,由C-3烷基取代的乙酰氧基香豆素在血小板中NO的形成要少得多。另外,在C-3位的烷基取代表现出形成除NO以外的自由基的趋势。