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Current Protocols in Protein Science, 2017
AbstractThis unit describes a number of methods for modifying cysteine residues of proteins and peptides. A general procedure for alkylation of cysteine residues in a protein of known size and composition with haloacyl reagents or N‐ethylmaleimide (NEM) is presented, and alternate protocols describe similar procedures for use when the size and ...
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AbstractThis unit describes a number of methods for modifying cysteine residues of proteins and peptides. A general procedure for alkylation of cysteine residues in a protein of known size and composition with haloacyl reagents or N‐ethylmaleimide (NEM) is presented, and alternate protocols describe similar procedures for use when the size and ...
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Analytical Biochemistry, 1963
Abstract A technically easy, sensitive method for specific determination of cysteine was developed. It was based upon the fact that an equimolecular reaction between cysteine and noradrenochrome caused the pink color of the latter to change to yellow, while the pink color remained unchanged or merely faded in the presence of other sulfhydryl ...
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Abstract A technically easy, sensitive method for specific determination of cysteine was developed. It was based upon the fact that an equimolecular reaction between cysteine and noradrenochrome caused the pink color of the latter to change to yellow, while the pink color remained unchanged or merely faded in the presence of other sulfhydryl ...
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A cysteine-selective fluorescent probe for the cellular detection of cysteine
Biomaterials, 2012A series of coumarin fluorophores (1-3), each bearing a double bond conjugated quinoline unit that can undergo a Michael-type reaction with thiol-containing compounds, is reported. These systems, designed to provide so-called turn-on changes in fluorescence response when exposed to thiols, act as fluorescent chemical sensors for cysteine (Cys ...
Seok Lee +8 more
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Formation of cysteine-S-conjugates in the Maillard reaction of cysteine and xylose
Food Chemistry, 2013Cysteine-S-conjugates (CS-conjugates) occur in foods derived from plant sources like grape, passion fruit, onion, garlic, bell pepper and hops. During eating CS-conjugates are degraded into aroma-active thiols by β-lyases that originate from oral microflora.
Renée Guntz-Dubini, Christoph Cerny
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Cysteine proteinases and metastasis
CANCER AND METASTASIS REVIEW, 1984Cysteine proteinases are a subclass of endopeptidases which require activation by thiol reagents. A tumor cysteine proteinase which appears to be related to lysosomal cathepsin B has been implicated in the ability of tumor cells to invade the extracellular matrix and to metastasize to secondary sites.
Bonnie F. Sloane, Kenneth V. Honn
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Degradation of DNA by cysteine
Archives of Biochemistry and Biophysics, 1971Abstract Exposure of DNA solutions to cysteine resulted in degradation of the polydeoxynucleotide. This reaction was inhibited by Na2 EDTA and by sodium citrate. Methylcysteine, mercaptoethanol, serine, and homocysteine did not exhibit this degradative effect. Preincubation of cysteine resulted in a more rapid rate of degradation thus suggesting that
Herbert S. Rosenkranz, Samuel Rosenkranz
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A Review on Various Uses of N-Acetyl Cysteine
Cell journal, 2016N-acetyl cysteine (NAC), as a nutritional supplement, is a greatly applied antioxidant in vivo and in vitro. NAC is a precursor of L-cysteine that results in glutathione elevation biosynthesis. It acts directly as a scavenger of free radicals, especially
V. Mokhtari +4 more
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Conformers of Gaseous Cysteine
Journal of Chemical Theory and Computation, 2009Structures, accurate relative energies, equilibrium and vibrationally averaged rotational constants, quartic and sextic centrifugal distortion constants, dipole moments, (14)N nuclear quadrupole coupling constants, anharmonic vibrational frequencies, and double-harmonic infrared intensities have been determined from ab initio electronic structure ...
Henry F. Schaefer +4 more
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Brain Research, 1975
Cysteine oxidase, which catalyzes the oxidation of cysteine to the neuroexcitatory and neurotoxic compounds cysteine sulfinic and sulfonic acids, previously has not been studied successfully in brain. Here we report optimal conditions for measuring cysteine oxidase activity in rat brain, describe its regional and subcellular distribution and compare ...
John W. Olney, Chandra H. Misra
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Cysteine oxidase, which catalyzes the oxidation of cysteine to the neuroexcitatory and neurotoxic compounds cysteine sulfinic and sulfonic acids, previously has not been studied successfully in brain. Here we report optimal conditions for measuring cysteine oxidase activity in rat brain, describe its regional and subcellular distribution and compare ...
John W. Olney, Chandra H. Misra
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Cysteine proteinases in chondrosarcomas
Matrix Biology, 2001The aim of the present study was to define the role of cathepsins B, H, K, L and S in the pathogenesis of human chondrosarcomas. For this purpose 40 tumour samples obtained from 12 patients with the diagnosis of conventional chondrosarcoma were systematically investigated for the expression of cathepsin mRNAs by Northern hybridisation, and for ...
Allan J. Aho +5 more
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