Chlamydocin–hydroxamic acid analogues as histone deacetylase inhibitors
作者:Norikazu Nishino、Binoy Jose、Ryuzo Shinta、Tamaki Kato、Yasuhiko Komatsu、Minoru Yoshida
DOI:10.1016/j.bmc.2004.08.041
日期:2004.11
Chlamydocin-hydroxamic acid analogues were designed and synthesized as histone deacetylase (HDAC) inhibitors based on the structure and HDAC inhibitory activity of chlamydocin and trichostatin A. Chlamydocin is a cyclic tetrapeptide containing an epoxyketone moiety in the side chain that makes it an irreversible inhibitor of HDAC. We replaced the epoxyketone moiety of chlamydocin with hydroxamic acid to
Phe3-substituted analogs of deltorphin C. Spatial conformation and topography of the aromatic ring in peptide recognition by .delta. opioid receptors
作者:Severo Salvadori、Sharon D. Bryant、Clementina Bianchi、Gianfranco Balboni、Valeria Scaranari、Martti Attila、Lawrence H. Lazarus
DOI:10.1021/jm00076a001
日期:1993.11
conformational properties of the amino acid residue at position 3 in deltorphin C on binding to delta and mu opioidreceptors, a series of 5- and 6-membered ring and bicyclic amino acid replacements at position 3 were prepared by solution synthesis methods. In general, the substitutions were deleterious for high delta affinity (Ki delta) and delta selectivity (Ki mu/Ki delta). However, several notable
为了研究deltorphin C第3位氨基酸残基的电子,疏水和构象性质对与δ和μ阿片受体结合的贡献,一系列5和6元环和双环氨基酸取代通过溶液合成方法制备3位上的化合物。通常,取代对高δ亲和力(Ki delta)和δ选择性(Ki mu / Ki delta)有害。然而,认识到几个显着的例外:含有受约束的双环结构Aic3和(R或S)Atc3的肽增强了delta亲和力,但是只有后者相对于deltorphin C(= 661)才将delta选择性提高了4倍(= 2475)。在另一个极端,N alpha MePh3的δ亲和力下降了900倍。[N alpha MePhe3]-,[(R或S)C alpha MePhe3]-,[Tic3]-,[Aic3]-的生物测定 和[(R或S)Atc3] deltorphin C使用豚鼠回肠(GPI)和小鼠输精管(MVD)的mu和δ生物活性,分别揭示了MVD生物活性与
Molecular design of histone deacetylase inhibitors by aromatic ring shifting in chlamydocin framework
作者:Gururaj M. Shivashimpi、Satoshi Amagai、Tamaki Kato、Norikazu Nishino、Satoko Maeda、Tomonori G. Nishino、Minoru Yoshida
DOI:10.1016/j.bmc.2007.08.041
日期:2007.12
capping group, corresponding to cyclic tetrapeptide framework in case of chlamydocin is supposed to interact with the surface of HDAC molecule. Various changes in amino acid residues in chlamydocin may afford specific inhibitors toward HDAC paralogs. To find out specific inhibitors, we focused on benzene ring of l-Phe in chlamydocin framework to shift to various parts of cyclic tetrapeptide. We prepared
Synthesis and SAR of novel, potent and orally bioavailable benzimidazole inhibitors of poly(ADP-ribose) polymerase (PARP) with a quaternary methylene-amino substituent
作者:Gui-Dong Zhu、Viraj B. Gandhi、Jianchun Gong、Sheela Thomas、Yan Luo、Xuesong Liu、Yan Shi、Vered Klinghofer、Eric F. Johnson、David Frost、Cherrie Donawho、Ken Jarvis、Jennifer Bouska、Kennan C. Marsh、Saul H. Rosenberg、Vincent L. Giranda、Thomas D. Penning
DOI:10.1016/j.bmcl.2008.06.023
日期:2008.7
containing a quaternary methylene-amino substituent at the C-2 position of the benzimidazole. Geminal dimethyl analogs at the methylene-amino substituent were typically more potent than mono-methyl derivatives in both intrinsic and cellular assays. Smaller cycloalkanes such as cyclopropyl or cyclobutyl were tolerated at the quaternary carbon while larger rings were detrimental to potency. In vivo efficacy
Three analogues of leucineenkephalin, in which the terminal tyrosine-1 residue has been replaced by conformationallyrestrained aromatic aminoacids, have been synthesized by classical solution methods. Their opiate agonist potencies on electrically stimulated guinea pig ileum and mouse vas deferens preparations were determined and compared with morphine, Met enkephalin, and Leu enkephalin. None of