Sequence-dependent reactivity of model peptides with glyceraldehyde
作者:Nobuhiro Mori、Yasuo Bai、Hiroshi Ueno、James M. Manning
DOI:10.1016/0008-6215(89)84085-6
日期:1989.6
Glyceraldehyde reacted faster with tripeptides than with dipeptides. The pH profiles of the reactions with tripeptides displayed optima in the range of 8.5-10.0, approximately 1-2 pH units higher than found with dipeptides. The second amino acid residue influences not only the rate of reaction but also the extent of formation of the product of the Amadori rearrangement, the ketoamine. The presence
Peptide Metal–Organic Frameworks for Enantioselective Separation of Chiral Drugs
作者:José Navarro-Sánchez、Ana I. Argente-García、Yolanda Moliner-Martínez、Daniel Roca-Sanjuán、Dmytro Antypov、Pilar Campíns-Falcó、Matthew J. Rosseinsky、Carlos Martí-Gastaldo
DOI:10.1021/jacs.7b00280
日期:2017.3.29
We report the use of a chiral Cu(II) 3D metal-organic framework (MOF) based on the tripeptide Gly-l-His-Gly (GHG) for the enantioselective separation of metamphetamine and ephedrine. Monte Carlo simulations suggest that chiralrecognition is linked to preferential binding of one of the enantiomers as a result of either stronger or additional H-bonds with the framework that lead to energetically more
我们报告了使用基于三肽 Gly-l-His-Gly (GHG) 的手性 Cu(II) 3D 金属有机框架 (MOF) 对甲基苯丙胺和麻黄碱进行对映选择性分离。蒙特卡罗模拟表明,手性识别与一种对映异构体的优先结合有关,这是由于与框架的更强或额外的 H 键导致能量更稳定的非对映加合物。使用 Cu(GHG) 作为萃取相对外消旋混合物进行固相萃取,只需 4 分钟即可分离出 >50% 的 (+)-麻黄碱对映体作为目标化合物。据我们所知,这是第一个能够分离手性极性药物的 MOF 的例子。
Utilizing Reversible Copper(II) Peptide Coordination in a Sequence-Selective Luminescent Receptor
作者:Stefan Stadlbauer、Alexander Riechers、Andreas Späth、Burkhard König
DOI:10.1002/chem.200701442
日期:2008.3.7
The benzocrownether recognizes the N-terminal amino moiety intramolecularly, and the significantly increased emission intensity signals the binding event, because only if prior coordination of the peptide has taken place is the intramolecular ammonium ion-benzocrown ether interaction of sufficient strength in water to trigger an emission signal. Intermolecular ammonium ion-benzocrown ether binding
A transition-metal chromophore as a new, sensitive spectroscopic tag for proteins. Selective covalent labeling of histidine residues in cytochromes c with chloro(2,2':6'2"-terpyridine)platinum(II) chloride
作者:Eva Marie A. Ratilla、Herb M. Brothers、Nenad M. Kostic
DOI:10.1021/ja00249a023
日期:1987.7
opposite from that of PtCl/sub 4//sup 2 -/ although both of them are platinum(II)-chloro complexes. Owing to an interplay between the steric and electroniceffects of the terpyridyl ligand, the new reagent is unreactive toward methionine (a thio ether) and cystine (a disulfide), which are otherwise highly nucleophilic ligands, but very reactive toward imidazole, which is otherwise a relativelymore » weak
以马和金枪鱼的细胞色素 c 为例,研究了 Pt(trpy)Cl/sup +/ 对蛋白质的反应性和选择性。新的过渡金属试剂在 pH 5 时对组氨酸残基具有特异性。通过咪唑轻松一步置换 Cl/sup -/ 配体的反应产生了良好的产率。结合位点,马蛋白中的 His 26 和 His 33 以及金枪鱼蛋白中的 His 26,通过紫外-可见分光光度法和肽图实验确定。制备并表征了咪唑、组氨酸、组氨酸衍生物和含组氨酸肽的模型复合物。共价连接的 Pt(trpy)/sup 2 +/ 标记允许通过阳离子交换色谱轻松分离蛋白质衍生物。标签不会干扰细胞色素 c 的构象和还原潜力,如紫外可见分光光度法、循环伏安法、微分脉冲伏安法、EPR 光谱和 /sup 1/H NMR 光谱所示。Pt(trpy)Cl/sup +/ 的选择性与 PtCl/sub 4//sup 2 -/ 的选择性完全相反,尽管它们都是铂 (II)-氯
C-TERMINUS AMIDATION ENZYME COMPOSITION, PROCESS FOR ITS PREPARATION AND ITS USE
申请人:SHISEIDO COMPANY LIMITED
公开号:EP0447547A1
公开(公告)日:1991-09-25
A C-terminus amidation enzyme composition of serum or blood plasma origin, which acts on a C-terminus glycine adduct represented by formula (I) (wherein A represents a residue other than α-amino or imino group and α-carboxyl group of a natural α-amino acid origin, and X represents a hydrogen atom or a residue of an amino acid derivative bound to the N atom via a carbonyl group) to produce a C-terminus amidation product represented by formula (II) (wherein A and X are as defined above) and glyoxylic acid, is disclosed. A process for preparing the composition and its use are also disclosed.
一种来源于血清或血浆的 C-端酰胺化酶组合物,它作用于式(I)代表的 C-端甘氨酸加合物(其中 A 代表除天然 α-氨基酸来源的 α-氨基或亚胺基和 α-羧基以外的残基),X 代表氢原子或通过羰基与 N 原子结合的氨基酸衍生物残基、和 X 代表氢原子或通过羰基与 N 原子结合的氨基酸衍生物残基),以产生由式 (II) 代表的 C 端酰胺化产物(其中 A 和 X 如上定义)和乙醛酸。还公开了制备该组合物的工艺及其用途。