S-acylation is not restricted to palmitate but it includes shorter, longer, and unsaturated fatty acids. However, the diversity of this protein modification has not been fully explored. Herein, we report a chemical probe that combined with MS-based analysis allows the rapid detection and quantification of fatty acids linked to proteins. We have used this approach to profile the S-acylome and to show that the
Photo-reactive RuII-oligonucleotide conjugates: influence of an intercalating ligand on the inter- and intra-strand photo-ligation processes
作者:Stéphane Le Gac、Martin Foucart、Pascal Gerbaux、Eric Defrancq、Cécile Moucheron、Andrée Kirsch - De Mesmaeker
DOI:10.1039/c0dt00355g
日期:——
revealed that the similar photo-damaging efficacy of crosslinking by Ru(T) and Ru(D) is a consequence of a cascade of events with compensatory effects, originating from the different geometry of interaction of the tethered complexes. Notably, antagonistic effects are present when the complex is intercalated, the guanine oxidation step being highly favoured and the recombination of the quenching products
Peptide Microarrays for the Determination of Protease Substrate Specificity
作者:Cleo M. Salisbury、Dustin J. Maly、Jonathan A. Ellman
DOI:10.1021/ja027477q
日期:2002.12.1
to yield substrate specificity profiles. Standard instrumentation for visualization of microarrays can be used to obtain comparisons of the specificity constants for all of the prepared substrates. The utility of these arrays is demonstrated by the selective cleavage of preferred substrates with trypsin, thrombin, and granzyme B, and by assessing the extended substrate specificity of thrombin using
描述了一种用于制备允许快速测定蛋白酶底物特异性的底物微阵列的方法。使用标准技术在固体支持物上合成的肽基香豆素底物,使用 DNA 微阵列设备打印到载玻片上。从肽到载玻片的连接是通过化学选择性反应形成的,从而产生一系列均匀显示的荧光底物。可以用蛋白酶处理阵列以产生底物特异性谱。可使用用于微阵列可视化的标准仪器来比较所有制备的底物的特异性常数。这些阵列的效用通过胰蛋白酶、凝血酶和颗粒酶 B 对优选底物的选择性裂解得到证明,
Compositions containing, methods involving, and uses of non-natural amino acids and polypeptides
申请人:Ambrx, Inc.
公开号:EP2399893A2
公开(公告)日:2011-12-28
Disclosed herein are non-natural amino acids and polypeptides that include at least one non-natural amino acid, and methods for making such non-natural amino acids and polypeptides. The non-natural amino acids, by themselves or as a part of a polypeptide, can include a wide range of possible functionalities, but typical have at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Also disclosed herein are non-natural amino acid polypeptides that are further modified post-translationally, methods for effecting such modifications, and methods for purifying such polypeptides. Typically, the modified non-natural amino acid polypeptides include at least one oximine, carbonyl, dicarbonyl, and/or hydroxylamine group. Further disclosed are methods for using such non-natural amino acid polypeptides and modified non-natural amino acid polypeptides, including therapeutic, diagnostic, and other biotechnology uses.
A homo-multifunctional cross-linking reagent (CLR) wherein said CLR is a polyhydroxy polymer (PHP) comprising a PHP-backbone and a plurality of a reactive substituent which i) is attached to said PHP-backbone and ii) exhibits one or more reactive CLR-groups; wherein the PHP is polyvinyl alcohol and wherein the reactive CLR-group is a nucleophilic group selected from carbazate.