5746-58-7Relevant articles and documents
Lenzimycins A and B, Metabolites With Antibacterial Properties From Brevibacillus sp. Associated With the Dung Beetle Onthophagus lenzii
An, Joon Soo,Hong, Hee-Jeon,Hong, Seong-Heon,Jo, Shin-Il,Kim, Byung-Yong,Kim, Suk Won,Lee, Jayho,Oh, Dong-Chan,Oh, Ki-Bong,Shin, Jongheon,Somers, Elisabeth,Woo, Donghee
, (2020)
Symbiotic microorganisms associated with insects can produce a wide array of metabolic products, which provide an opportunity for the discovery of useful natural products. Selective isolation of bacterial strains associated with the dung beetle, Onthophagus lenzii, identified two strains, of which the antibiotic-producing Brevibacillus sp. PTH23 inhibited the growth of Bacillus sp. CCARM 9248, which is most closely related to the well-known entomopathogen, Bacillus thuringiensis. A comprehensive chemical investigation based on antibiotic activity discovered two new antibiotics, named lenzimycins A and B (1-2), which inhibited growth of Bacillus sp. CCARM 9248. The 1H and 13C NMR, MS, MS/MS, and IR analyses elucidated the structures of 1 and 2, which comprised a novel combination of fatty acid (12-methyltetradecanoic acid), glycerol, sulfate, and N-methyl ethanolamine. Furthermore, the acid hydrolysis of 1 revealed the absolute configuration of 12-methyltetradecanoic acid as 12S by comparing its optical rotation value with authentic (R)- and (S)-12-methyltetradecanoic acid. In addition to inhibition of Bacillus sp. CCARM 9248, lenzimycins A and B were found to inhibit the growth of some human pathogenic bacteria, including Enterococcus faecium and certain strains of Enterococcus faecalis. Furthermore, the present study elucidated that lenzimycins A and B activated a reporter system designed to detect the bacterial cell envelope stress, thereby indicating an activity against the integrity of the bacterial cell wall.
Mutual influence of backbone proline substitution and lipophilic tail character on the biological activity of simplified analogues of caspofungin
Mulder, Monique P. C.,Fodran, Peter,Kemmink, Johan,Breukink, Eefjan J.,Kruijtzer, John A. W.,Minnaard, Adriaan J.,Liskamp, Rob M. J.
, p. 7491 - 7502 (2012/10/29)
The echinocandins represent the most recent class of antifungal drugs. Previous structure-activity relationship studies on these lipopeptides have relied mainly upon semisynthetic derivatives due to their complex chemical structures. A successful strategy for the rapid enantioselective synthesis of the branched fatty acid chain of caspofungin and analogues was developed to synthesize several simplified analogues of caspofungin. The specific minimum inhibitory activity of each mimic was determined against a panel of Candida strains. This approach gave access to new fully synthetic derived caspofungin mimics with high and selective antifungal activities against Candida strains. In addition, the data suggested an important role of the hydroxy proline residue in the bioactive conformation of the macrocyclic peptide ring structure.
Synthesis of (S)-(+)-enantiomers of food-relevant (n-5)-monoenoic and saturated anteiso-fatty acids by a Wittig reaction
Thurnhofer, Saskia,Vetter, Walter
, p. 1140 - 1145 (2007/10/03)
We developed an enantioselective synthesis for the food-relevant anteiso-fatty acids a15:0, a16:0, and a17:0. Different (carboxyalkyl)triphenylphosphonium bromide salts were coupled with (S)-3-methylpentanal in a Wittig reaction. Mixtures of the obtained cis-/trans-isomers were separated by Ag+-HPLC to give the novel cis-isomers of (S)-(+)-a15:1n-5, (S)-(+)-a16:1n-5, and (S)-(+)-a17:1n-5. Hydrogenation of the monoenoic products led to (S)-(+)-a15:0, (S)-(+)-a16:0, and (S)-(+)-a17:0, which are essential for the assessment of the bioactivity of tests with standards of anteiso-fatty acids.
Enatiomeric separation of branched fatty acids after conversion with trans-2-(2,3-Anthracenedicarboximido)cyclohexanol, a highly sensitive chiral fluorescent conversion reagent
Akasaka, Kazuaki,Ohrui, Hiroshi
, p. 1209 - 1215 (2007/10/03)
(1R,2R)-2-(2,3-Anthracenedicarboximido)cyclohexanol was synthesized as a highly sensitive chiral fluorescent conversion reagent. The diastereomeric derivatives of chiral branched fatty acids that had methyl ethyl chirality from the 2 to 12 position were separated into 2 peaks by reversed-phase HPLC and detected at the 10-15 mole level by fluorometry.
Synthesis of both the enantiomers of aseanostatin P5 (sarcinic acid), an inhibitor of myeloperoxidase release, and four diastereomers of aggreceride A, a platelet aggregation inhibitor.
Kitahara,Aono,Mori
, p. 78 - 82 (2007/10/02)
Both the enantiomers of aseanostatin P5 (sarcinic acid), an inhibitor of myeloperoxidase (MPO) release from human polymorphonuclear leukocytes (PMN), with high optical purity were synthesized by starting from (S)-2-methylbutanol and methyl (S)-3-hydroxy-2