Immobilized Hydroxynitrile Lyases for Enantioselective Synthesis of Cyanohydrins: Sol-Gels and Cross-Linked Enzyme Aggregates
作者:Fabien L. Cabirol、Ulf Hanefeld、Roger A. Sheldon
DOI:10.1002/adsc.200606139
日期:2006.8
The hydroxynitrile lyases (HNLs) from Prunus amygdalus (PaHNL), Manihot esculenta (MeHNL), and Hevea brasiliensis (HbHNL) were successfully immobilized in sol-gels. The cross-linked enzyme aggregate (CLEA) of HbHNL was also prepared. These immobilized enzymes and the commercial PaHNL- and MeHNL-CLEAs were employed for the enantioselective synthesis of cyanohydrins. The sol-gels were highly efficient
杏李(Pa HNL),Manihot esculenta(Me HNL)和巴西橡胶树(Hb HNL)的羟腈裂解酶(HNL)已成功固定在溶胶-凝胶中。还制备了Hb HNL的交联酶聚集体(CLEA)。这些固定化酶和商业化的Pa HNL-和MeHNL-CLEA用于氰醇的对映选择性合成。溶胶-凝胶在低催化剂负载下非常高效,并且对有机溶剂(二异丙醚)和底物/产物失活特别稳定。不同HNLs的CLEAs的稳定作用不一致,并且在二异丙醚中观察到Pa HNL-和Hb HNL-CLEAs明显失活。相比之下,商业上的Me HNL-CLEA被证明是在二异丙基醚中非常强大和有效的生物催化剂。