title: Oxyfunctionalization of aliphatic compounds by a recombinant peroxygenase from Coprinopsis cinerea.
abstract: The goal of this study is the selective oxyfunctionalization of aliphatic compounds under mild and environmentally friendly conditions using a low-cost enzymatic biocatalyst. This could be possible taking advantage from a new peroxidase type that catalyzes monooxygenase reactions with H2 O2 as the only cosubstrate (peroxygenase). With this purpose, recombinant peroxygenase, from gene mining in the sequenced genome of Coprinopsis cinerea and heterologous expression using an industrial fungal host, is tested for the first time on aliphatic substrates. The reaction on free and esterified fatty acids and alcohols, and long-chain alkanes was followed by gas chromatography, and the different reaction products were identified by mass spectrometry. Regioselective hydroxylation of saturated/unsaturated fatty acids was observed at the ω-1 and ω-2 positions (only at the ω-2 position in myristoleic acid). Alkyl esters of fatty acids and monoglycerides were also ω-1 or ω-2 hydroxylated, but di- and tri-glycerides were not modified. Fatty alcohols yielded hydroxy derivatives at the ω-1 or ω-2 positions (diols) but also fatty acids and their hydroxy derivatives. Interestingly, the peroxygenase was able to oxyfunctionalize alkanes giving, in addition to alcohols at positions 2 or 3, dihydroxylated derivatives at both sides of the molecule. The predominance of mono- or di-hydroxylated derivatives seems related to the higher or lower proportion of acetone, respectively, in the reaction medium. The recombinant C. cinerea peroxygenase appears as a promising biocatalyst for alkane activation and production of aliphatic oxygenated derivatives, with better properties than the previously reported peroxygenase from Agrocybe aegerita, and advantages related to its recombinant nature for enzyme engineering and industrial production.
authors.affiliation: Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Reina Mercedes 10, Seville, Spain.
authors.forename: Esteban D
authors.initials: ED
authors.lastname: Babot
authors.forename: José C
authors.initials: JC
authors.lastname: del Río
authors.forename: Lisbeth
authors.initials: L
authors.lastname: Kalum
authors.forename: Angel T
authors.initials: AT
authors.lastname: Martínez
authors.forename: Ana
authors.initials: A
authors.lastname: Gutiérrez
mesh_terms: D000363:Agaricales / Q000201:enzymology* / Q000235:genetics; D000473:Alkanes / Q000737:chemistry / Q000378:metabolism*; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism*; D005233:Fatty Alcohols / Q000737:chemistry / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D006900:Hydroxylation; D006899:Mixed Function Oxygenases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
chemical_list: D000473:Alkanes; D005227:Fatty Acids; D005233:Fatty Alcohols; D011994:Recombinant Proteins; D006899:Mixed Function Oxygenases; C022333:peroxygenase
keywords: alkanes; fatty acids; fatty alcohols; hydroxylation; peroxygenase