ANTIMICROBIAL COMPOSITION CONTAINING AN OXIDOREDUCTASE AND AN ENHANCER OF THER N-HYDROXYANILIDE-TYPE
申请人:——
公开号:US20020094331A1
公开(公告)日:2002-07-18
The present invention relates to an enzymatic composition capable of killing or inhibiting microbial cells or micro-organisms, e.g. in laundry, on hard surfaces, in water systems, on skin, on teeth or on mucous membranes. The present invention also relates to the use of said enzymatic composition for preserving food products, cosmetics, paints, coatings, etc.
N-Arylhydroxamicacids (AHAs) are promising novel N−OH mediators for oxidoreductase catalysis. They are electrochemically active compounds with a redox potential of 0.31−0.41 V vs. SCE. Representative oxidoreductases, e.g. fungal peroxidase from Coprinus cinereus (rCiP), catalyze the oxidation of AHAs with apparent bimolecular constants (kox) of 7.1·103 to 1.5·107M−1s−1 at pH = 8.5 and 25 °C. The limiting
N-芳基异羟肟酸(AHA)是用于氧化还原酶催化的有前途的新型 N-OH 介质。它们是电化学活性化合物,相对于 SCE,氧化还原电位为 0.31-0.41 V。代表性氧化还原酶,例如来自灰鬼伞 (rCiP) 的真菌过氧化物酶,在 pH = 8.5 和 25 °C 时催化表观双分子常数 (kox) 为 7.1·103 至 1.5·107M-1s-1 的 AHA 氧化。底物氧化的限制步骤是化合物 II (Cpd II) 的还原。N-羟基乙酰苯胺 (1a) 和 N-羟基-N-苯基苯甲酰胺 (2a) 的氧化常数通过停流和稳态方法确定,相似。Cpd II 还原率降低的还原率降低发生在 1a 的 pKa = 8.5 和 2a 的 7.7 处。1a 的硝酰基自由基是氧化反应的中间体,在碱性 pH 值下稳定性下降。这些 AHA 的构效关系 (SAR) 在 Marcus 交叉关系的框架内进行分析,并使用从头算