[EN] MAIT CELL AGONISTS<br/>[FR] AGONISTES DE CELLULES MAIT
申请人:VICTORIA LINK LTD
公开号:WO2019058289A1
公开(公告)日:2019-03-28
The invention relates to peptide conjugates of Formula (I). The peptide conjugates of the invention have activity as MAIT agonists. The peptide conjugates of the invention also enhance immune responses and therefore are effective vaccines and vaccine adjuvants. The invention also relates to methods and uses of such conjugates.
Virtual screening of a library of commercially available compounds versus the structure of Mycobacterium tuberculosis lumazine synthase identified 2-(2-oxo-1,2-dihydrobenzo[cd]indole-6-sulfonamido)acetic acid ( 9) as a possible lead compound. Compound 9 proved to be an effective inhibitor of M. tuberculosis lumazine synthase with a K-i of 70 mu M. Lead optimization through replacement of the carboxymethylsulfonamide sidechain with sulfonamides substituted with alkyl phosphates led to a four-carbon phosphate 38 that displayed a moderate increase in enzyme inhibitory activity (K-i 38 mu M). Molecular modeling based on known lumazine synthase/inhibitor crystal structures suggests that the main forces stabilizing the present benzindolone/enzyme complexes involve pi-pi stacking interactions with Trp27 and hydrogen bonding of the phosphates with Arg128, the backbone nitrogens of Gly85 and Gln86, and the side chain hydroxyl of Thr87. (C) 2010 Elsevier Ltd. All rights reserved.