Discovery of a potent and highly β1 specific proteasome inhibitor from a focused library of urea-containing peptide vinyl sulfones and peptide epoxyketones
作者:Wouter A. van der Linden、Lianne I. Willems、Tamer B. Shabaneh、Nan Li、Mark Ruben、Bogdan I. Florea、Gijs A. van der Marel、Markus Kaiser、Alexei F. Kisselev、Herman S. Overkleeft
DOI:10.1039/c1ob06554h
日期:——
Syringolins, a class of natural products, potently and selectively inhibit the proteasome and show promising antitumour activity. To gain insight in the mode of action of syringolins, the ureido structural element present in syringolins is incorporated in oligopeptide vinyl sulfones and peptide epoxyketones yielding a focused library of potent new proteasome inhibitors. The distance of the ureido linkage with respect to the electrophilic trap strongly influences subunit selectivity within the proteasome. Compounds 13 and 15 are β5 selective and their potency exceeds that of syringolin A. In contrast, 5 may well be the most potent β1 selective compound active in living cells reported to date.
Solution and soluble polymer syntheses of 3-aminoimidazoline-2,4-diones
作者:Juyoung Yoon、Chang-Woo Cho、Hyunsoo Han、Kim D. Janda
DOI:10.1039/a807067i
日期:——
3-Aminoimidazoline-2,4-dione derivatives have been synthesized from a combination of α- and aza-amino acids by both solution phase and soluble polymer supported approaches; this soluble polymer methodology combines clean product isolation with recycling of the original matrix.
AMINO ACID AND PEPTIDE CARBAMATE PRODRUGS OF TAPENTADOL AND USES THEREOF
申请人:Franklin Richard
公开号:US20100227921A1
公开(公告)日:2010-09-09
Prodrugs of tapentadol with amino acids or short peptides, pharmaceutical compositions containing such prodrugs and a method for providing pain relief with the tapentadol prodrugs are provided herein. Prodrugs having side chains of valine, leucine, isoleucine and glycine amino acids and mono-, di- and tripeptides thereof are preferred. Additionally, methods for avoiding or minimizing the adverse gastrointestinal side effects associated with tapentadol administration, as well as increasing the oral bioavailability of tapentadol are provided herein.
process for syringolin A analogues having improved proteasome inhibitory and antitumor activity is described. The strategy was to first establish a convergent synthesis of syringolin A using a rare intramolecular Ugi three‐component reaction in the last stage of the synthesis, so as to gain access toa set of structure‐based analogues. The inhibitory activity of chymotrypsin‐like activity of 20S proteasome
Enzymatic C<sub>β</sub>–H Functionalization of <scp>l</scp>-Arg and <scp>l</scp>-Leu in Nonribosomally Derived Peptidyl Natural Products: A Tale of Two Oxidoreductases
作者:Zheng Cui、Han Nguyen、Minakshi Bhardwaj、Xiachang Wang、Martin Büschleb、Anke Lemke、Christian Schütz、Christian Rohrbacher、Pierre Junghanns、Stefan Koppermann、Christian Ducho、Jon S. Thorson、Steven G. Van Lanen
DOI:10.1021/jacs.1c08177
日期:2021.11.24
Muraymycins are peptidyl nucleoside antibiotics that contain two Cβ-modified amino acids, (2S,3S)-capreomycidine and (2S,3S)-β-OH-Leu. The former is also a component of chymostatins, which are aldehyde-containing peptidic protease inhibitors that─like muraymycin─are derived from nonribosomal peptide synthetases (NRPSs). Using feeding experiments and in vitrocharacterization of 12 recombinant proteins, the
Muraymycins 是肽基核苷抗生素,含有两个 C β-修饰的氨基酸,(2 S ,3 S )-卷曲霉素和 (2 S ,3 S )-β-OH-Leu。前者也是凝乳抑素的成分,凝乳抑素是一种含醛的肽蛋白酶抑制剂,与胞壁霉素一样,源自非核糖体肽合成酶 (NRPS)。使用 12 种重组蛋白的喂养实验和体外表征,现在定义了两种非蛋白质氨基酸的生物合成机制。(2 S ,3 S)-capreomycidine 显示涉及 FAD 依赖性脱氢酶:需要 NRPS 结合途径中间体作为底物的环化酶。与其他卷曲霉素非对映异构体的生物合成相比,这种隐蔽的脱氢策略在时间上和机制上都是不同的,之前已证明其通过非血红素 Fe 2+ - 和 α 成员催化的游离 l -Arg 的C β -羟基化进行-酮戊二酸 (αKG) 依赖性双加氧酶家族和(最终)由不同酶催化的脱水介导的环化过程。与我们最初的预期相反,唯一的非血红素 Fe