Amalgamation of Nucleosides and Amino Acids in Antibiotic Biosynthesis: Discovery of an <scp>l</scp>-Threonine:Uridine-5′-Aldehyde Transaldolase
作者:Sandra Barnard-Britson、Xiuling Chi、Koichi Nonaka、Anatol P. Spork、Nidhi Tibrewal、Anwesha Goswami、Pallab Pahari、Christian Ducho、Jurgen Rohr、Steven G. Van Lanen
DOI:10.1021/ja308185q
日期:2012.11.14
shared enzyme catalyzes an aldol-type condensation with glycine and uridine-5'-aldehyde to furnish GlyU. Using LipK involved in A-90289biosynthesis as a model, we now functionally assign and characterize the enzyme responsible for the C-C bond-forming event during GlyU biosynthesis as an l-threonine:uridine-5'-aldehyde transaldolase. Biochemical analysis revealed this transformation is dependent upon p
Biosynthetic Origin of the Atypical Stereochemistry in the Thioheptose Core of Albomycin Nucleoside Antibiotics
作者:Richiro Ushimaru、Hung-wen Liu
DOI:10.1021/jacs.8b12565
日期:2019.2.13
d-ribofuranose ring and an l-amino acid moiety. The conversion of l-to d-amino acid configuration is catalyzed by the PLP-dependent epimerase AbmD. The d- ribo to d- xylo conversion of the thiofuranose ring appears according to gene deletion experiments to be mediated by AbmJ, which is annotated as a radical S-adenosyl-l-methionine (SAM) enzyme. These studies establish several key steps in the assembly of the
Enzymatic Synthesis of the Ribosylated Glycyl-Uridine Disaccharide Core of Peptidyl Nucleoside Antibiotics
作者:Zheng Cui、Xiaodong Liu、Jonathan Overbay、Wenlong Cai、Xiachang Wang、Anke Lemke、Daniel Wiegmann、Giuliana Niro、Jon S. Thorson、Christian Ducho、Steven G. Van Lanen
DOI:10.1021/acs.joc.8b00855
日期:2018.7.6
Muraymycins belong to a family of nucleoside antibiotics that have a distinctive disaccharide core consisting of 5-amino-5-deoxyribofuranose (ADR) attached to 6′-N-alkyl-5′-C-glycyluridine (GlyU). Here, we functionally assign and characterize six enzymes from the muraymycin biosynthetic pathway involved in the core assembly that starts from uridine monophosphate (UMP). The biosynthesis is initiated