A Nonribosomal Peptide Synthetase-Derived Iron(III) Complex from the Pathogenic Fungus Aspergillus fumigatus
摘要:
Small molecules (SMs) play central roles as virulence factors of pathogenic fungi and bacteria; however, genomic analyses suggest that the majority of microbial SMs have remained uncharacterized. Based on microarray analysis followed by comparative metabolomics of overexpression/knockout mutants, we identified a tryptophan-derived iron(III)-complex, hexadehydro-astechrome (HAS), as the major product of the cryptic has nonribosomal peptide synthetase (NRPS) gene cluster in the human pathogen Aspergillus fumigatus. Activation of the has cluster created a highly virulent A. fumigatus strain that increased mortality of infected mice. Comparative metabolomics of different mutant strains allowed to propose a pathway for HAS biosynthesis and further revealed cross-talk with another NAPS pathway producing the anticancer fumitremorgins.
Enzymatic
<i>O</i>
‐Prenylation of Diverse Phenolic Compounds by a Permissive
<i>O</i>
‐Prenyltransferase from the Medicinal Mushroom
<i>Antrodia camphorata</i>
作者:Junbin He、Zhimin Hu、Zeyuan Dong、Bin Li、Kuan Chen、Zhanpeng Shang、Meng Zhang、Xue Qiao、Min Ye
DOI:10.1002/adsc.201901396
日期:2020.2.6
Prenylated compounds are pharmacologically attractive natural products that are widely distributed in nature. Prenyltransferases (PTs) could catalyze the transfer of prenyl moieties to aromatic acceptors and increase the structural diversity and biological activity of natural products. In this work, a permissive O‐prenyltransferase AcaPT was discovered from Antrodia camphorata, a precious medicinal
Tyrosine <i>O</i>-Prenyltransferase SirD Catalyzes <i>S</i>-, <i>C</i>-, and <i>N</i>-Prenylations on Tyrosine and Tryptophan Derivatives
作者:Jeffrey D. Rudolf、C. Dale Poulter
DOI:10.1021/cb400691z
日期:2013.12.20
prenylation of the hydroxyl group in tyrosine as the first committed step in the biosynthesis of the phytotoxin sirodesmin PL. SirD also catalyzes normal N-prenylation of 4-aminophenylalanine and normal C-prenylation at C7 of tryptophan. In this study, we found that 4-mercaptophenylalanine and several derivatives of tryptophan are also substrates for prenylation by dimethylallyl diphosphate. Incubation
A 7-dimethylallyltryptophan synthase from Aspergillus fumigatus: overproduction, purification and biochemical characterization
作者:Anika Kremer、Lucia Westrich、Shu-Ming Li
DOI:10.1099/mic.0.2007/009019-0
日期:2007.10.1
second dimethylallyltryptophan synthase identified in A. fumigatus. Interestingly, it shares a sequence identity of only 31 % at the amino acid level with another known dimethylallyltryptophan synthase, FgaPT2, from the same fungus; FgaPT2 prenylates l-Trp at the C-4 position of the indole ring. Afu3g12930 belongs to a putative biosynthetic gene cluster consisting of eight genes. Orthologous clusters were
Structure‐Guided Mutagenesis Reveals the Catalytic Residue that Controls the Regiospecificity of C6‐Indole Prenyltransferases
作者:Ahmed R Aoun、Nagaraju Mupparapu、Diem N Nguyen、Tae Ho Kim、Christopher M. Nguyen、Zhengfeiyue Pan、Sherif I. Elshahawi
DOI:10.1002/cctc.202300423
日期:2023.6.9
indole C6 position is challenging. Yet, certain indole prenyltransferases (IPTs) catalyze this reaction efficiently, regiospecifically and under physiological conditions. Through enzyme engineering, in vitro enzymatic reactions and NMR experiments, guided by protein structure analyses, the mechanism was verified by which C6 IPTs catalyze their reactions.
proxima. This PT transfers dimethylallyl moieties to l-tyrosine at the para-O position and to l-tryptophan at atom C-7 and represents the first basidiomycete l-tyrosine PT described so far. Phylogenetic analysis of PTs in fungi revealed that basidiomycete l-tyrosine PTs have evolved independently from their ascomycete counterparts and might represent the evolutionary origin of PTs acting on phenolic