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L Xie et al.
Biochemistry, 38(18), 5925-5931 (1999-05-08)
Alkylation of myosin's Cys-707 (SH1) and Cys-697 (SH2) has profound consequences for myosin's ability to interact with actin and hydrolyze MgATP. Pre-steady-state measurements of myosin-S1 alkylated at SH1 and SH2 by N-phenylmaleimide (NPM) in the presence of ATP were taken
Gang Shen et al.
Colloids and surfaces. B, Biointerfaces, 35(1), 59-65 (2004-07-21)
Reaction of N-phenyl maleimide (NPM) with silica surfaces modified with a self-assembled monolayer of (aminopropyl)triethoxysilane (APTES) was investigated using infrared spectroscopy (FTIR), elemental analysis, and titration assays. This reaction is of interest as a test case for using amine-maleimide coupling
M Ouzzine et al.
The Journal of biological chemistry, 275(36), 28254-28260 (2000-06-08)
Galbeta1,3-glucuronosyltransferase (GlcAT-I) that catalyzes the transfer of a glucuronic acid residue onto the trisaccharide primer of the glycosaminoglycan-protein linkage region plays an essential role in the early steps of the biosynthesis of glycosaminoglycans. In order to gain insight into the
J M Janey et al.
The Journal of organic chemistry, 65(26), 9059-9068 (2001-01-10)
Achiral and chiral 1-(2-oxazolidinon-3-yl)-3-siloxy-1,3-butadienes were prepared from readily available starting materials. Although more stable than the parent 1-amino-3-siloxy dienes, the 1-(2-oxazolidinon-3-yl)-3-siloxy-1,3-butadienes are still very reactive in Diels-Alder reactions, somewhat more than 1,3-dialkoxy-1, 3-butadienes (e.g., Danishefsky's diene). The cycloadditions of the
Masato Hoshino et al.
Chemical & pharmaceutical bulletin, 56(4), 480-484 (2008-04-02)
Diels-Alder reactions between N-phenylmaleimide, acting as the dienophile, and 2(1H)-pyridones having a methoxy or a chloro substituent, were carried out, under atmospheric and high pressure conditions, to give the corresponding isoquinuclidine derivatives. Stereoselectivity of the Diels-Alder reactions was studied using
Nicolas Matuszak et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 45(3), 263-271 (2011-12-01)
The endocannabinoid system is implicated in numerous physiopathological processes while more and more pieces of evidence wave the link between this complex machinery and cancer related phenomenon. In these lines, we confirmed the effects of 2-arachidonoylglycerol (2-AG), the main endocannabinoid
Amitabh Jha et al.
Bioorganic & medicinal chemistry letters, 20(5), 1510-1515 (2010-02-13)
Several series of compounds containing the 1,4-dioxo-2-butenyl moiety have been prepared as candidate cytotoxins, including the methyl N-arylmaleamates, methyl N-arylfumaramates, and N-arylmaleimides. In addition, the N-arylisomaleimides were synthesized which are the structural isomers of N-arylmaleimides. These compounds were evaluated against
M Sortino et al.
Bioorganic & medicinal chemistry, 19(9), 2823-2834 (2011-04-13)
The synthesis, in vitro evaluation and SAR studies of 67 maleimides and derivatives acting as antifungal agents are reported. A detailed SAR study supported by theoretical calculations led us to determine that: an intact maleimido ring appears to be necessary
W X Li et al.
Biochimica et biophysica acta, 1367(1-3), 127-133 (1998-10-24)
The finding of Barnett et al. (Biophys. J. 61 (1992) 358) that NPM-reacted crossbridge heads do not bind strongly to actin in rigor solution is not easily interpreted in terms of the solution studies of Xie and Schoenberg (Biochemistry 37
Vânia F Noldin et al.
Pharmacological reports : PR, 63(3), 772-780 (2011-08-23)
Myeloperoxidase (MPO) is an important enzyme that catalyzes the reaction between hydrogen peroxide and chloride to generate hypochlorous acid, which oxidizes a range of biomolecules and has been associated with inflammatory diseases. The synthetic compounds N-phenylmaleimide (NFM) and 4-methyl-N-phenylmaleimide (Me-NFM)
Stewart F Parker
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 63(3), 544-549 (2005-09-15)
A combination of infrared, Raman and inelastic neutron scattering (INS) spectroscopies with density functional theory (DFT) calculations is used to provide a complete assignment of the vibrational spectra of N-phenylmaleimide and N-(perdeuterophenyl)maleimide. DFT is shown to give very good results
Yu Liu et al.
Organic & biomolecular chemistry, 10(31), 6388-6394 (2012-06-27)
The combination of methyl 3,7-dioxo-2-diazo-4-octenoate from the zinc triflate catalyzed Mukaiyama-Michael reaction of methyl 3-tert-butylsilyloxy-2-diazobutenoate and 4-methoxy-3-buten-2-one with Michael acceptors (methyl vinyl ketone, N-phenylmaleimide, β-nitrovinylarenes) in the presence of a catalytic amount of base provides convenient access to highly substituted
Jian-Hui Wen et al.
Talanta, 84(1), 13-18 (2011-02-15)
Representing a compound by a numerous structural descriptors becomes common in quantitative structure-activity relationship (QSAR) studies. As every descriptor carries molecular structure information more or less, it seems more advisable to investigate all the possible descriptor vectors rather than traditional
D McLaggan et al.
Applied and environmental microbiology, 66(4), 1393-1399 (2000-04-01)
The electrophile N-ethylmaleimide (NEM) elicits rapid K(+) efflux from Escherichia coli cells consequent upon reaction with cytoplasmic glutathione to form an adduct, N-ethylsuccinimido-S-glutathione (ESG) that is a strong activator of the KefB and KefC glutathione-gated K(+) efflux systems. The fate
Hassan Y Aboul-Enein et al.
Preparative biochemistry & biotechnology, 33(3), 173-187 (2003-08-15)
Xanthine oxidase (XO), purified from buttermilk was subjected to modification with N-phenylmaleimide, p-toluene-sulfonyl chloride, and 2-mercaptobenzimidazole. Spectrophotometric monitoring of the enzyme before and after treatment with these modifiers are presented. The results show that the interaction of XO with the
Guang-Yu Li et al.
Molecular vision, 17, 3279-3289 (2011-12-24)
Visible light has been previously demonstrated to induce retinal ganglion cell (RGC)-5 cell death through the mitochondrial pathway. The present study was designed to determine whether visible light might also directly trigger the death pathway by damaging nuclear DNA. RGC-5
A A Bobkov et al.
Biophysical journal, 79(1), 460-467 (2000-06-27)
Myosin subfragment 1 (S1) with SH1 (Cys(707)) and SH2 (Cys(697)) groups cross-linked by p-phenylenedimaleimide (pPDM-S1) is thought to be an analog of the weakly bound states of myosin bound to actin. The structural properties of pPDM-S1 were compared in this
Yanyuan Wu et al.
Apoptosis : an international journal on programmed cell death, 12(3), 593-612 (2006-12-30)
A major outcome from Taxol treatment is induction of tumor cell apoptosis. However, metabolic responses to Taxol-induced apoptosis are poorly understood. In this study, we hypothesize that alterations in specific amino acid transporters may affect the Taxol-induced apoptosis in breast
M Salomon et al.
Biochemistry, 39(31), 9401-9410 (2000-08-05)
The plant photoreceptor phototropin is an autophosphorylating serine-threonine protein kinase activated by UV-A/blue light. Two domains, LOV1 and LOV2, members of the PAS domain superfamily, mediate light sensing by phototropin. Heterologous expression studies have shown that both domains function as
Claire Senay et al.
Biochimica et biophysica acta, 1597(1), 90-96 (2002-05-16)
The human UDP-glucuronosyltransferase 1A6 (UGT1A6) isoform is actively involved in the detoxication of phenolic compounds. In an effort to gain insight on active-site amino acids, we investigated the functional relevance of cysteinyl residues in the glucuronidation process. The enzyme was
Au(I)-catalyzed enantioselective 1,3-dipolar cycloadditions of münchnones with electron-deficient alkenes.
Asa D Melhado et al.
Journal of the American Chemical Society, 129(42), 12638-12639 (2007-09-29)
Nicolas Matuszak et al.
Journal of medicinal chemistry, 52(23), 7410-7420 (2009-07-09)
The endocannabinoid 2-arachidonoylglycerol (2-AG) plays a major role in many physiological processes, and its action is quickly terminated via enzymatic hydrolysis catalyzed by monoglyceride lipase (MGL). Regulating its endogenous level could offer therapeutic opportunities; however, few selective MGL inhibitors have
Sandra Müller et al.
The Biochemical journal, 386(Pt 2), 227-236 (2004-10-06)
XT-I (xylosyltransferase I) is the initial enzyme in the post-translational biosynthesis of glycosaminoglycan chains in proteoglycans. To gain insight into the structure-function relationship of the enzyme, a soluble active form of human XT-I was expressed in High Five insect cells
I Velasco-Guillén et al.
Archives of biochemistry and biophysics, 372(1), 121-127 (1999-11-24)
The Ca(2+)-ATPase from sarcoplasmic reticulum reacts with phenylmaleimide, producing the inhibition of the ATPase activity following a pseudo-first-order kinetic with a rate constant of 19 M(-1) s(-1). Calcium and ATP binding are not altered upon phenylmaleimide inhibition. However, the presence
S Xu et al.
Biophysical journal, 82(4), 2111-2122 (2002-03-28)
It is well established that in a skeletal muscle under relaxing conditions, cross-bridges exist in a mixture of four weak binding states in equilibrium (A*M*ATP, A*M*ADP*P(i), M*ATP, and M*ADP*P(i)). It has been shown that these four weak binding states are
Maximiliano Sortino et al.
Bioorganic & medicinal chemistry, 16(1), 560-568 (2007-10-27)
N-Phenyl and N-phenylalkyl maleimides (alkyl chain=(CH(2))n; n=0-4) and their respective open derivatives (maleamic acids) were evaluated against Candida spp. with the microbroth dilution method following the guidelines of CLSI (formely NCCLS). MIC values of maleimides without pre-incubation and submitted to
Michael L Vasil et al.
Antimicrobial agents and chemotherapy, 56(12), 6223-6234 (2012-09-26)
The twin-arginine translocase (TAT) in some bacterial pathogens, including Pseudomonas aeruginosa, Burkholderia pseudomallei, and Mycobacterium tuberculosis, contributes to pathogenesis by translocating extracellular virulence determinants across the inner membrane into the periplasm, thereby allowing access to the Xcp (type II) secretory
Lynsey J Watson et al.
Organic & biomolecular chemistry, 10(33), 6649-6655 (2012-07-18)
The Diels-Alder cycloadducts of 4-vinylimidazoles and N-phenylmaleimide are shown to undergo facile intermolecular ene reactions. Overall the reaction of three simple molecules (a diene, a dienophile and an enophile) in a two-step process gives 4,5,6,7-tetrahydro-1H-benzo[d]imidazoles with high yields, high atom
Yan Wang et al.
The Journal of organic chemistry, 77(8), 4143-4147 (2012-04-05)
A Me-DuPhos-catalyzed efficient asymmetric [3 + 2] cycloaddition reaction between Morita-Baylis-Hillman carbonates of isatins and N-phenylmaleimide has been developed. This reaction constructs three chiral centers in one step to afford spirocyclopentaneoxindoles in good yields (up to 84%) with excellent diastereo-
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