Chemoenzymatic synthesis of prodigiosin analogues—exploring the substrate specificity of PigC
作者:Suresh R. Chawrai、Neil R. Williamson、George P. C. Salmond、Finian J. Leeper
DOI:10.1039/b719353j
日期:——
Analogues of prodigiosin, a tripyrrolic pigment produced by Serratia species with potent immunosuppressive and anticancer activities, have been produced by feeding synthetic analogues of the normal precursor MBC to mutants of Serratia sp. ATCC 39006 or to engineered strains of Escherichia coli; in this way it has been shown that the prodigiosin synthesising enzyme, PigC, has a relaxed substrate-specificity.
Role and substrate specificity of the Streptomyces coelicolor RedH enzyme in undecylprodiginine biosynthesis
作者:Stuart W. Haynes、Paulina K. Sydor、Anna E. Stanley、Lijiang Song、Gregory L. Challis
DOI:10.1039/b801677a
日期:——
The function of RedH from Streptomyces coelicolor as an enzyme that catalyses the condensation of 4-methoxy-2,2′-bipyrrole-5-carboxaldehyde (MBC) and 2-undecylpyrrole to form the natural product undecylprodiginine has been experimentally proven, and the substrate specificity of RedH has been probed in vivo by examining its ability to condense chemically-synthesised MBC analogues with 2-undecylpyrrole to afford undecylprodiginine analogues.
proteins compared to obatoclax (a pan-Bcl-2 inhibitor). These novel smallmolecules arrested the cell cycle in the G0/G1 phase, cleaved caspase-3/9, and finally prompted late apoptosis. This small molecule-mediated mitochondrial damage induced remarkably high cervical cancercell death. These unique smallmolecules can be further explored as chemical biology tools and next-generation organelle-targeted anticancer
Antimalarial Activity of Natural and Synthetic Prodiginines
作者:Kancharla Papireddy、Martin Smilkstein、Jane Xu Kelly、Shweta、Shaimaa M. Salem、Mamoun Alhamadsheh、Stuart W. Haynes、Gregory L. Challis、Kevin A. Reynolds
DOI:10.1021/jm200543y
日期:2011.8.11
Prodiginines are a family of linear and cyclic oligopyrrole red-pigmented compounds. Herein we describe the in vitro antimalarial activity of four natural (IC50 = 1.7–8.0 nM) and three sets of synthetic prodiginines against Plasmodium falciparum. Set 1 compounds replaced the terminal nonalkylated pyrrole ring of natural prodiginines and had diminished activity (IC50 > 2920 nM). Set 2 and set 3 prodiginines