Dinucleoside Polyphosphate NAD Analogs as Potential NMN Adenylyltransferase Inhibitors. Synthesis and Biological Evaluation
摘要:
Two dinucleoside polyphosphate NAD analogs, P-1-(adenosine-5')-P-3-(nicotinamide riboside-5')triphosphate (Np(3)A, 1) and P-1-(adenosine-5')-P-4-(nicotinamide riboside-5')tetraphosphate (Np(4)A, 2), were synthesized and tested as inhibitors of both microbial and human recombinant NMN adenylyltransferase. Compounds 1 and 2 proved to be selective inhibitors of microbial enzymes.
[EN] COMBINATION OF NICOTINAMIDE MONONUCLEOTIDE DERIVATIVES AND OTHER THERAPEUTIC AGENTS FOR USE IN THE TREATMENT OF CORONAVIRUS INFECTIONS AND COVID-19 [FR] COMBINAISON DE DÉRIVÉS DE NICOTINAMIDE MONONUCLÉOTIDE ET D'AUTRES AGENTS THÉRAPEUTIQUES DESTINÉE À ÊTRE UTILISÉE DANS LE TRAITEMENT D'INFECTIONS À CORONAVIRUS ET DE LA COVID-19
of PAR. Herein, we report new NAD+ analogues that are efficiently processed by wild‐type ARTs and lead to chain termination owing to a lack of the required hydroxy group, thereby significantly reducing the complexity of the protein modification. Due to the presence of an alkyne group, these NAD+ analogues allow subsequent manipulations by click chemistry for labeling with dyes or affinity markers.
Serine racemase catalyzes both the synthesis and the degradation of d-serine, an obligatory co-agonist of the glutamatergic NMDA receptors. It is allosterically controlled by adenosinetriphosphate (ATP), which increases its activity around 7-fold through a co-operative binding mechanism. Serine racemase has been proposed as a drug target for the treatment of several neuropathologies but, so far, the
Synthesis of cyclic adenosine 5′-diphosphate ribose analogues: a C2′ endo/syn “southern” ribose conformation underlies activity at the sea urchin cADPR receptor
作者:Christelle Moreau、Gloria A. Ashamu、Victoria C. Bailey、Antony Galione、Andreas H. Guse、Barry V. L. Potter
DOI:10.1039/c0ob00396d
日期:——
Novel 8-substituted base and sugar-modified analogues of the Ca2+ mobilizing second messenger cyclic adenosine 5â²-diphosphate ribose (cADPR) were synthesized using a chemoenzymatic approach and evaluated for activity in sea urchin egg homogenate (SUH) and in Jurkat T-lymphocytes; conformational analysis investigated by 1H NMR spectroscopy revealed that a C2â² endo/syn conformation of the âsouthernâ ribose is crucial for agonist or antagonist activity at the SUH-, but not at the T cell-cADPR receptor.
采用化学酶法合成了新型 8 取代碱基和糖修饰的 Ca2+ 调动第二信使环腺苷-5â²-二磷酸核糖(cADPR)类似物,并对其在海胆卵匀浆(SUH)和 Jurkat T 淋巴细胞中的活性进行了评估;通过 1H NMR 光谱进行的构象分析发现,C2â² 内/同步构象是 CADPR 在海胆蛋匀浆(SUH)受体(而不是在 T 细胞-CADPR 受体)中发挥激动剂或拮抗剂活性的关键。
PROBE FOR IMAGING PARP-1 ACTIVITY
申请人:The Board of Trustees of the Leland Stanford Junior University
公开号:US20160185805A1
公开(公告)日:2016-06-30
Provided are embodiments of a small molecule tracer for positron emission tomography (PET) imaging of the enzyme activity of PARP-1 that is responsible for DNA-damage sensing and critically involved in radiation therapy and some chemotherapy response mechanisms. These PARP-1 tracers are derivatives of nicotinamide adenine dinucleotide (NAD), which is the natural substrate for PARP-1. Provided are NAD derivatives that include a linker moiety to which may be attached a label moiety such as a PET detectable fluorine to generate a 6N-(triazo-PEG2-
18
F)-NAD. Especially advantageous for use in PET and MRI scanning detection systems is the attachment of a chelating agent that allows for the formation of a chelator-metal ion complex.
Emissive Synthetic Cofactors: An Isomorphic, Isofunctional, and Responsive NAD<sup>+</sup> Analogue
作者:Alexander R. Rovira、Andrea Fin、Yitzhak Tor
DOI:10.1021/jacs.7b05852
日期:2017.11.8
of a fluorescent NAD+ analogue based on an isothiazolo[4,3-d]pyrimidine core (NtzAD+) are described. Enzymatic reactions, photophysically monitored in real time, show NtzAD+ and NtzADH to be substrates for yeast alcohol dehydrogenase and lactatedehydrogenase, respectively, with reaction rates comparable to that of the native cofactors. A drop in fluorescence is seen as NtzAD+ is converted to NtzADH
描述了基于异噻唑并[4,3- d ]嘧啶核(N tz AD +)的荧光NAD +类似物的合成,光物理和生化作用。实时光物理监测的酶促反应显示,N tz AD +和N tz ADH分别是酵母醇脱氢酶和乳酸脱氢酶的底物,其反应速率与天然辅因子相当。当N tz AD +转换为N tz ADH时,荧光下降反映了与自然NAD + / NADH互补的光物理行为。N tz AD +和N tz ADH用作NADase的底物,可选择性裂解烟酰胺的糖苷键,产生tz ADP-核糖。N tz AD +还用作核糖基转移酶的底物,包括人腺苷核糖基转移酶5(ART5)和霍乱毒素亚基A(CTA),它们水解烟酰胺并转移tz ADP-核糖。分别形成精氨酸类似物。这些反应可以通过荧光光谱法进行监测,这与使用非放射性NAD +的相应过程形成了鲜明的对比。