Blackburn G M, Taylor G E, Thatcher G R, Prescott M, McLennan A G
Department of Chemistry, University of Sheffield, UK.
Nucleic Acids Res. 1987 Sep 11;15(17):6991-7004. doi: 10.1093/nar/15.17.6991.
Novel analogues of P1,P4-bis(5'-adenosyl) tetraphosphate, Ap4A (1), have been prepared with sulphur substituents at P1 and P4 and either oxygen or methylene bridges at the P2,P3-position. Separation of three isomers of the ApspCH2ppsA species has been achieved by a combination of mplc and hplc and the Rp,Rp, Rp,Sp, and Sp,Sp diastereoisomers identified on the basis of selective enzymatic hydrolysis using snake venom phosphodiesterase. Each of these three isomers is a strong competitive inhibitor of the specific Ap4Aase from Artemia and is highly resistant to the asymmetric cleavage normally catalysed by this enzyme.
已制备出P1,P4-双(5'-腺苷)四磷酸(Ap4A,1)的新型类似物,其在P1和P4位带有硫取代基,在P2,P3位带有氧或亚甲基桥。通过中压液相色谱(mplc)和高效液相色谱(hplc)相结合的方法实现了ApspCH2ppsA物种三种异构体的分离,并基于使用蛇毒磷酸二酯酶的选择性酶促水解鉴定出Rp,Rp、Rp,Sp和Sp,Sp非对映异构体。这三种异构体中的每一种都是卤虫特异性Ap4A酶的强竞争性抑制剂,并且对该酶通常催化的不对称切割具有高度抗性。