On November 9, 2011, Liu, Jian; Luo, Chuanyun; Smith, Peter A.; Chin, Jodie K.; Page, Malcolm G. P.; Paetzel, Mark; Romesberg, Floyd E. published an article.Name: H-Phg(4-OH)-OH The title of the article was Synthesis and characterization of the arylomycin lipoglycopeptide antibiotics and the crystallographic analysis of their complex with signal peptidase. And the article contained the following:
Glycosylation of natural products, including antibiotics, often plays an important role in determining their phys. properties and their biol. activity, and thus their potential as drug candidates. The arylomycin class of antibiotics inhibits bacterial type I signal peptidase and is comprised of three related series of natural products with a lipopeptide tail attached to a core macrocycle. Previously, we reported the total synthesis of several A series derivatives, which have unmodified core macrocycles, as well as B series derivatives, which have a nitrated macrocycle. We now report the synthesis and biol. evaluation of lipoglycopeptide arylomycin variants whose macrocycles are glycosylated with a deoxy-α-mannose substituent, and also in some cases hydroxylated. The synthesis of the derivatives bearing each possible deoxy-α-mannose enantiomer allowed us to assign the absolute stereochem. of the sugar in the natural product and also to show that while glycosylation does not alter antibacterial activity, it does appear to improve solubility Crystallog. structural studies of a lipoglycopeptide arylomycin bound to its signal peptidase target reveal the mol. interactions that underlie inhibition and also that the mannose is directed away from the binding site into solvent which suggests that other modifications may be made at the same position to further increase solubility and thus reduce protein binding and possibly optimize the pharmacokinetics of the scaffold. The experimental process involved the reaction of H-Phg(4-OH)-OH(cas: 32462-30-9).Name: H-Phg(4-OH)-OH
The Article related to arylomycin lipoglycopeptide antibiotic synthesis antibacterial structure activity solubility, crystal structure lipoglycopeptide signal peptidase complex modeling, tyrosine coupling cyclization glycosylation and other aspects.Name: H-Phg(4-OH)-OH
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