Bioactive Compounds from the Scale Insect Pathogenic Fungus Conoideocrella tenuis BCC 18627
摘要:
A new cyclophexadepsipeptide, conoideocrellide A (1), its linear derivatives, conoideocrellides B-D (2-4), three new hopane triterpenoids (5-7), two new bioxanthracenes (9 and 10), and a new isocoumarin glycoside (13) were isolated from the scale insect pathogenic fungus Conoideocrella tenuis BCC 18627. Biological activities of the new compounds were evaluated.
Paecilodepsipeptide A (1), a newcyclohexadepsipeptide possessing three d-amino acid residues, together with its linear analogues paecilodepsipeptides B (2) and C (3), was isolated from the insect pathogenic fungus Paecilomyces cinnamomeus BCC 9616. Structures of these compounds were elucidated primarily by NMR and mass spectroscopic analyses. The absolute configurations of the amino acid and hydroxy
Biochemical and Mechanistic Characterization of the Fungal Reverse <i>N-</i>1-Dimethylallyltryptophan Synthase DMATS1<sub>Ff</sub>
作者:Immo Burkhardt、Zhongfeng Ye、Slavica Janevska、Bettina Tudzynski、Jeroen S. Dickschat
DOI:10.1021/acschembio.9b00828
日期:2019.12.20
to convert tyrosine into its regularly O-prenylated derivative. Investigation of the binding sites of DMATS1Ff by homology modeling and comparison to the crystal structure of 4-DMATS FgaPT2 showed an almost identical site for DMAPP binding but different residues for tryptophan coordination. Several putative active site residues were verified by site directed mutagenesis of DMATS1Ff. Homology models of
Tryptophan prenyltransferases showing higher catalytic activities for Friedel–Crafts alkylation of o- and m-tyrosines than tyrosine prenyltransferases
作者:Aili Fan、Xiulan Xie、Shu-Ming Li
DOI:10.1039/c5ob01040c
日期:——
Better conversion of l-o- and l-m-tyrosine to their C-prenylated derivatives by tryptophan prenyltransferases (Trp-PTs) than tyrosine O-prenyltransferases (Tyr-O-PT).
Prenylation of tyrosine and derivatives by a tryptophan C7-prenyltransferase
作者:Aili Fan、Shu-Ming Li
DOI:10.1016/j.tetlet.2014.07.080
日期:2014.9
7-DMATS from Aspergillus fumigatus and SirDfromLeptosphaeriamaculans catalyse a C7-prenylation of l-tryptophan and an O-prenylation of l-tyrosine in nature, respectively. SirD was reported to catalyse the C7-prenylation of l-tryptophan and some derivatives thereof in vitro. We report here the O-prenylation of tyrosine and O- or N-prenylation of its derivatives by 7-DMATS. These results provide experimental
Determination of Alkyl-Donor Promiscuity of Tyrosine-<i>O</i>
-Prenyltransferase SirD from <i>Leptosphaeria maculans</i>
作者:Chandrasekhar Bandari、Erin M. Scull、Johanna M. Masterson、Rachel H. Q. Tran、Steven B. Foster、Kenneth M. Nicholas、Shanteri Singh
DOI:10.1002/cbic.201700469
日期:2017.12.5
The alkyl donor scope of tyrosine‐O‐prenyltransferase SirD has been determined by use of 21 synthetic alkyl pyrophosphate analogues, and the corresponding O‐alkylated tyrosine products have been characterized by NMR. The study highlights SirD as highly promiscuous towards unnatural alkyl donors and provides insight into steric factors that impact the alkyl chain selectivity.