Metabolic engineering of 尾-oxidation in Penicillium chrysogenum for improved semi-synthetic cephalosporin biosynthesis

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• 作者：Tâ ; nia Veigap>ap>p> ; p>p>cp>p> ; p>p>1p> ; Andreas K. Gombertp>ap>p> ; p>p>cp>p> ; p>p>dp>p> ; p>p>1p> ; Nils Landesp>ap>p> ; p>p>cp> ; Maarten D. Verhoevenp>ap>p> ; p>p>cp> ; Jan A.K.W. Kielp>cp>p> ; p>p>fp> ; Arjen M. Krikkenp>cp>p> ; p>p>fp> ; Jeroen G. Nijlandp>cp>p> ; p>p>ep> ; Hesselien Touwp>gp> ; Marijke A.H. Luttikp>ap>p> ; p>p>cp> ; John C. van der Toornp>bp> ; Arnold J.M. Driessenp>cp>p> ; p>p>ep> ; Roel A.L. Bovenbergp>fp>p> ; p>p>gp> ; Marco A. van den Bergp>gp> ; Ida J. van der Kleip>cp>p> ; p>p>fp> ; Jack T. Pronkp>ap>p> ; p>p>cp> ; Jean-Marc Daranp>ap>p> ; p>p>cp>p> ; p>p>j.g.daran@tudelft.nlp>
• 关键词：Penicillium chrysogenum ; 尾-lactams ; Cephalosporins ; 尾-oxidation ; Adipic acid ; Metabolic engineering
• 刊名：Metabolic Engineering
• 出版年：2012
• 期刊代码：98_10967176
• 类别：ce
• 出版时间：July, 2012
• 卷：14
• 期：4
• 页码：437-448
• 文件大小：993 K

摘要

Industrial production of semi-synthetic cephalosporins by m>Penicillium chrysogenumm> requires supplementation of the growth media with the side-chain precursor adipic acid. In glucose-limited chemostat cultures of m>P. chrysogenumm>, up to 88%of the consumed adipic acid was not recovered in cephalosporin-related products, but used as an additional carbon and energy source for growth. This low efficiency of side-chain precursor incorporation provides an economic incentive for studying and engineering the metabolism of adipic acid in m>P. chrysogenumm>. Chemostat-based transcriptome analysis in the presence and absence of adipic acid confirmed that adipic acid metabolism in this fungus occurs via 尾-oxidation. A set of 52 adipate-responsive genes included six putative genes for acyl-CoA oxidases and dehydrogenases, enzymes responsible for the first step of 尾-oxidation. Subcellular localization of the differentially expressed acyl-CoA oxidases and dehydrogenases revealed that the oxidases were exclusively targeted to peroxisomes, while the dehydrogenases were found either in peroxisomes or in mitochondria. Deletion of the genes encoding the peroxisomal acyl-CoA oxidase Pc20g01800 and the mitochondrial acyl-CoA dehydrogenase Pc20g07920 resulted in a 1.6- and 3.7-fold increase in the production of the semi-synthetic cephalosporin intermediate adipoyl-6-APA, respectively. The deletion strains also showed reduced adipate consumption compared to the reference strain, indicating that engineering of the first step of 尾-oxidation successfully redirected a larger fraction of adipic acid towards cephalosporin biosynthesis.