Biocatalysis by metallated cyclotriphosphazenes: L2Zn(NO3)2 {L = spiro-N3P3[O2C12H8][N(CH3)NH2]} as a synthetic phosphoesterase and nuclease

Journal of Chemical Sciences

C Madhavaiah¹  Ramachandran Azhakar¹  Sandeep Verma¹  Vadapalli Chandrasekhar1¹  Venkatasubbiah Krishnan¹ 

[1] Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India$$

关键词: Cyclophosphazene hydrazides;    metalated cyclophosphazenes;    zinc complexes;    phosphate ester hydrolysis;    DNA cleavage.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Catalytic activity of [L2.Zn][NO3]2 (L = spiro-N3P3[O2C12H8][N(CH3)NH2]) towards the hydrolysis of two phosphodiesters, [bis(𝑝-nitrophenyl)phosphate, bNPP] and [2-(hydroxypropyl)-p-nitrophenyl phosphate, hNPP] has been examined. While the rate of hydrolysis of the former is accelerated over a million-fold, the rate of hydrolysis of the latter also is enhanced considerably. Detailed kinetic evaluation of these reactions has been carried out and all the kinetic parameters including the Michaelis-Menten parameters are reported. The catalyst [L2.Zn][NO3]2 has also been found to be an effective nuclease. Relaxation of supercoiled plasmid DNA, pBR322, occurs in presence of [L2.Zn][NO3]2 without the need for any exogenous reagents.

【 授权许可】

Unknown