Ergot alkaloid biosynthesis in Aspergillus fumigatus: Conversion of chanoclavine-I aldehyde to festuclavine by the festuclavine synthase FgaFS in the presence of the old yellow enzyme FgaOx3
作者:Christiane Wallwey、Marco Matuschek、Xiu-Lan Xie、Shu-Ming Li
DOI:10.1039/c003823g
日期:——
amplified by PCR from a cDNA library of Aspergillusfumigatus, cloned into pQE70 and overexpressed in E. coli. The soluble monomeric His6-FgaFS was purified by affinity chromatography and used for enzyme assays. It has been shown that FgaFS is responsible for the conversion of chanoclavine-I aldehyde to festuclavine in the presence of the old yellow enzyme FgaOx3. The structure of festuclavine including the
An Old Yellow Enzyme Gene Controls the Branch Point between
<i>Aspergillus fumigatus</i>
and
<i>Claviceps purpurea</i>
Ergot Alkaloid Pathways
作者:Christine M. Coyle、Johnathan Z. Cheng、Sarah E. O'Connor、Daniel G. Panaccione
DOI:10.1128/aem.02914-09
日期:2010.6.15
fungal groups in the family Clavicipitaceae produce toxic ergot alkaloids. These fungi produce a variety of ergot alkaloids, including clavines as well as lysergic acidderivatives. Ergot alkaloids are also produced by the distantly related, opportunistic human pathogen Aspergillus fumigatus. However, this fungus produces festuclavine and fumigaclavines A, B, and C, which collectively differ from clavines
A Role for Old Yellow Enzyme in Ergot Alkaloid Biosynthesis
作者:Johnathan Z. Cheng、Christine M. Coyle、Daniel G. Panaccione、Sarah E. O’Connor
DOI:10.1021/ja910193p
日期:2010.2.17
Ergotalkaloids, secondary metabolites produced by filamentous fungi, elicit a diverse array of pharmacological effects. The biosynthesis of this class of natural products has not been fully elucidated. Here we demonstrate that a homologue of Old Yellow Enzyme encoded in the Aspergillus fumigatus ergot gene cluster catalyzes reduction of the alpha,beta unsaturated alkene of chanoclavine-I aldehyde