Fluorophore ATCUN complexes: combining agent and probe for oxidative DNA cleavage
作者:C. Wende、N. Kulak
DOI:10.1039/c5cc04508h
日期:——
DNA can be oxidatively cleaved by copper complexes of the ATCUNpeptide (aminoterminalCu(II)- and Ni(II)-bindingmotif). In order to investigate the fate of the metal ion throughout this...
Design and synthesis of a reagent for solid-phase incorporation of the phosphothreonine mimetic (2S,3R)-2-amino-3-methyl-4-phosphonobutyric acid (Pmab) into peptides in a bio-reversible phosphonyl-bis-pivaloyloxymethyl (POM) prodrug form
作者:Wen-Jian Qian、Terrence R. Burke
DOI:10.1007/s00726-013-1567-0
日期:2013.11
Reported herein are the synthesis and solid-phase peptide incorporation of N-Fmoc-(2S,3R)-2-amino-3-methyl-4-phosphonobutyric acid bis-pivaloyloxymethyl phosphoryl ester [Fmoc-Pmab(POM)2-OH, 2] as a phosphatase-stable phosphothreonine (pThr) mimetic bearing orthogonal protection suitable for the synthesis of Pmab-containing peptides having bio-reversible protection of the phosphonic acid moiety. This
本文报道了N- Fmoc-(2 S ,3 R )-2-氨基-3-甲基-4-膦酰丁酸双-新戊酰氧基甲基磷酸酯 [Fmoc-Pmab(POM) 2 - OH, 2 ] 作为磷酸酶稳定的磷酸苏氨酸 (pThr) 模拟物,具有正交保护,适用于合成具有膦酸部分生物可逆保护的含 Pmab 的肽。这代表了适用于简便固相肽合成形式的生物可逆保护 pThr 模拟物的第一份报告。
Zinc(ii) binding ability of tri-, tetra- and penta-peptides containing two or three histidyl residues
Thermodynamic stabilities of the zinc(II) complexes were primarily determined by the number of histidyl residues, but the presence of C-terminal carboxylate functions has also a significant contribution to metal binding. The stabilizing effect of the aspartyl beta-carboxylate group was also observed, but its extent is much weaker than that of the C-terminal carboxylate with a neighbouring histidyl
Interactions of Ni(<scp>ii</scp>) and Cu(<scp>ii</scp>) ions with the hydrolysis products of the C-terminal -ESHH- motif of histone H2A model peptides. Association of the stability of the complexes formed with the cleavage of the -E–S- bond
作者:Marios Mylonas、John C. Plakatouras、Nick Hadjiliadis
DOI:10.1039/b414679d
日期:——
position 3, the N-terminal amino group and the two amide nitrogens existing between these groups NH2, 2N-, NIm} forming 4N square-planar complexes. While in the case of the CuH(-1)L complex with SHHK- a possible axial coordination of the imidazole ring of His in position 2 was suggested, in the case of the analogous NiH(-1)L complex a completely different interaction of the same ring with metalions was
An Improved Method for the Protection of Carboxylic Acids as 1,1-Dimethylallyl Esters
作者:Minoo Sedighi、Selçuk Çalimsiz、Mark A. Lipton
DOI:10.1021/jo061207z
日期:2006.12.1
1,1-Dimethylallyl (DMA) esters of various N-protected amino acids have been synthesized using prenyldimethylsulfonium tetrafluroborate, a reagent that can be readily made and stored, in conjunction with catalytic CuBr. These reactions were complete within several hours and afforded DMA esters in high yields. As has been previously shown in our group, DMA esters represent a palladium-labile proctecting