Peptidomimetic Inhibitors of the Human Cytomegalovirus Protease
摘要:
The development of peptidomimetic inhibitors of the human cytomegalovirus (HCMV) :protease showing sub-micromolar potency in an enzymatic assay is described. Selective substitution of the amino acid residues of these inhibitors led to the identification of tripeptide inhibitors showing improvements in inhibitor potency cf 27-fold relative to inhibitor 39 based upon the natural tetrapeptide sequence. Small side chains at P-1 were well tolerated by this enzyme, a fact consistent with previous observations. The S-2 binding pocket of HCMV protease was very permissive, tolerating lipophilic and basic residues. The substitutions tried at P-3 indicated that a small increase in inhibitor potency could be realized by the substitution of a tert-leucine residue for valine. Substitutions of the N-terminal capping group did not significantly affect inhibitor potency. Pentafluoroethyl ketones, alpha,alpha-difluoro-beta-keto amides, phosphonates and a-keto amides were all effective substitutions for the activated carbonyl component and gave inhibitors which were selective for HCMV protease. A slight increase in potency was observed by lengthening the P-1' residue of the alpha-keto amide series of inhibitors. This position also tolerated a variety of groups making this a potential site for future modifications which could modulate the physicochemical properties of these molecules.
Inhibitor of ribonucleotide reductase of herpes viruses
申请人:MERCK & CO. INC.
公开号:EP0438873A1
公开(公告)日:1991-07-31
A series of substituted peptides have been found to possess antiviral potency - specifically against herpes viruses - by selectively inhibiting the viral ribonucleotide reductase enzyme.
Neuropeptide S (NPS) has been identified as the endogenous ligand of a previously orphan receptor now named NPSR. Previous studies demonstrated that the N-terminal sequence Phe(2)-Arg(3)-Asn(4) of the peptide is crucial for biological activity. Here, we report on a focused structure-activity study of Arg(3) and Asn(4) that have been replaced with a series of coded and non-coded amino acids. Thirty-eight human NPS analogues were synthesized and pharmacologically tested for intracellular calcium mobilization using HEK293 cells stably expressing the mouse NPSR. The results of this study demonstrated the following NPS position 3 structure-activity features: (i) the guanidine moiety and its basic character are not crucial requirements, (ii) an aliphatic amino acid with a linear three carbon atom long side chain is sufficient to bind and fully activate NPSR, (iii) the receptor pocket allocating the position 3 side chain can accommodate slightly larger side chains at least to a certain degree [hArg, Arg(NO(2)) or Arg(Me)(2) but not Arg(Tos)]. Position 4 seems to be more sensitive to amino acids replacement compared to position 3; in fact, all the amino acid replacements investigated produced either an important decrease of biological activity or generated inactive derivatives suggesting a pivotal role of the Asn4 side chain for NPS bioactivity. (C) 2008 Elsevier Ltd. All rights reserved.
IMMUNOMODULATORS
申请人:Bristol-Myers Squibb Company
公开号:EP3972694A1
公开(公告)日:2022-03-30
[EN] LIPIDATED PEPTIDE INHIBITORS OF INTERLEUKIN-23 RECEPTOR<br/>[FR] INHIBITEURS PEPTIDIQUES LIPIDÉS DU RÉCEPTEUR DE L'INTERLEUKINE-23
申请人:[en]JANSSEN BIOTECH, INC.
公开号:WO2023288019A2
公开(公告)日:2023-01-19
The present invention relates to novel lipidated peptide inhibitors of the interleukin-23 receptor (IL-23R) or pharmaceutically acceptable salts, solvates and/or other forms thereof, corresponding pharmaceutical compositions, methods and/or uses of the IL-23R inhibitors for treatment of autoimmune inflammation diseases and/or related disorders.