53759-36-7Relevant articles and documents
Design, synthesis, and biological evaluation of desmuramyl dipeptides modified by adamantyl-1,2,3-triazole
?kalamera, Dani,Antica, Mariastefania,Car, ?eljka,Dra?enovi?, Josip,Milkovi?, Lidija,Perokovi?, Vesna Petrovi?,Ribi?, Rosana,Stojkovi?, Ranko,Tomi?, Sr?anka
, (2021/11/01)
Muramyl dipeptide (MDP) is the smallest peptidoglycan fragment able to trigger the immune response. Structural modification of MDP can lead to the preparation of analogs with improved immunostimulant properties, including desmuramyl peptides (DMPs). The aim of this work was to prepare the desmuramyl peptide (L-Ala-D-Glu)-containing adamantyl-triazole moiety and its mannosylated derivative in order to study their immunomodulatory activities in vivo. The adjuvant activity of the prepared compounds was evaluated in a murine model using ovalbumin as an antigen, and compared to the reference adjuvant ManAdDMP. The results showed that the introduction of the lipophilic adamantyl-triazole moiety at the C-terminus of L-Ala-D-Glu contributes to the immunostimulant activity of DMP, and that mannosylation of DMP modified with adamantyl-triazole causes the amplification of its immunostimulant activity.
Transpeptidase-mediated incorporation of d-amino acids into bacterial peptidoglycan
Lupoli, Tania J.,Tsukamoto, Hirokazu,Doud, Emma H.,Wang, Tsung-Shing Andrew,Walker, Suzanne,Kahne, Daniel
supporting information; experimental part, p. 10748 - 10751 (2011/09/13)
The β-lactams are the most important class of antibiotics in clinical use. Their lethal targets are the transpeptidase domains of penicillin binding proteins (PBPs), which catalyze the cross-linking of bacterial peptidoglycan (PG) during cell wall synthesis. The transpeptidation reaction occurs in two steps, the first being formation of a covalent enzyme intermediate and the second involving attack of an amine on this intermediate. Here we use defined PG substrates to dissect the individual steps catalyzed by a purified E. coli transpeptidase. We demonstrate that this transpeptidase accepts a set of structurally diverse d-amino acid substrates and incorporates them into PG fragments. These results provide new information on donor and acceptor requirements as well as a mechanistic basis for previous observations that noncanonical d-amino acids can be introduced into the bacterial cell wall.
Transformations of glycyrrhizic acid. XIII. Synthesis of peptide derivatives of monomethyl glycyrrhizate
Baltina,Ryzhova,Vasil'eva,Tolstikov,Sakhautdinova,Lazareva,Kondratenko
, p. 810 - 814 (2007/10/03)
Novel dipeptide derivatives of glycyrrhizic acid monomethyl ester were synthesized by its condensation with Ala-Glu (or D-Glu) derivatives using Woodward K reagent or the active ester method. Two of the compounds prepared stimulated delayed hypersensitivi