{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T05:20:49Z","timestamp":1791091249838,"version":"4.1.0"},"reference-count":28,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2002,3,28]],"date-time":"2002-03-28T00:00:00Z","timestamp":1017273600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biotech &amp; Bioengineering"],"published-print":{"date-parts":[[2002,6,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The performance, in Baeyer\u2013Villiger and heteroatom oxidations, of a partially purified preparation of cyclohexanone monooxygenase obtained from an <jats:italic>Escherichia coli<\/jats:italic> strain in which the gene of the enzyme was cloned and overexpressed was investigated. As model reactions, the oxidations of racemic bicyclo[3.2.0]hept\u20102\u2010en\u20106\u2010one into two regioisomeric lactones and of methyl phenyl sulphide into the corresponding (<jats:italic>R<\/jats:italic>)\u2010sulphoxide were used. Enzyme stability and reuse, substrate and product inhibition, product removal, and cofactor recycling were evaluated. Of the various NADPH regeneration systems tested, 2\u2010propanol\/alcohol dehydrogenase from <jats:italic>Thermoanerobium brockii<\/jats:italic> appeared the most suitable because of the low cost of the second substrate and the high regeneration rate. Concerning enzyme stability, kosmotropic salts were the only additives able to improve it (e.g., half\u2010life from 1 day in diluted buffer to 1 week in 1 <jats:italic>M<\/jats:italic> sodium sulphate) but only under storage conditions. Instead, significant stabilization under working conditions was obtained by immobilization on Eupergit C (half\u2010life approximately 2.5 days), a procedure that made it possible to reuse the catalyst up to 16 times with complete substrate (5 g\u00b7L<jats:sup>\u22121<\/jats:sup>) conversion at each cycle. Reuse of free enzyme was also achieved in a membrane reactor but with lower efficiency. Water\u2010organic solvent biphasic systems, which would overcome substrate inhibition and remove from the aqueous phase, where reaction takes place, the formed product, were unsuccessful because of their destabilizing effect on cyclohexanone monooxygenase. More satisfactory was continuous substrate feeding, which shortened reaction times and, very importantly, yielded in the case of bicyclo[3.2.0]hept\u20102\u2010en\u20106\u2010one (10 g\u00b7L<jats:sup>\u22121<\/jats:sup>) both lactone products with high optical purity (enantiomeric excess \u226596%), which was not the case when all of the substrate was added in a single batch. \u00a9 2002 Wiley Periodicals, Inc. Biotechnol Bioeng 78: 489\u2013496, 2002.<\/jats:p>","DOI":"10.1002\/bit.10207","type":"journal-article","created":{"date-parts":[[2002,8,25]],"date-time":"2002-08-25T19:46:56Z","timestamp":1030304816000},"page":"489-496","source":"Crossref","is-referenced-by-count":97,"title":["Use of isolated cyclohexanone monooxygenase from recombinant <i>Escherichia coli<\/i> as a biocatalyst for Baeyer\u2013Villiger and sulfide oxidations"],"prefix":"10.1002","volume":"78","author":[{"given":"F.","family":"Zambianchi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Pasta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G.","family":"Carrea","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Colonna","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Gaggero","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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