Jianmin, Li; Cunwang, Ge, Crystal Research and Technology
作者:Jianmin, Li、Cunwang, Ge
DOI:——
日期:——
Monovalent Cation Activation of the Radical SAM Enzyme Pyruvate Formate-Lyase Activating Enzyme
作者:Krista A. Shisler、Rachel U. Hutcheson、Masaki Horitani、Kaitlin S. Duschene、Adam V. Crain、Amanda S. Byer、Eric M. Shepard、Ashley Rasmussen、Jian Yang、William E. Broderick、Jessica L. Vey、Catherine L. Drennan、Brian M. Hoffman、Joan B. Broderick
DOI:10.1021/jacs.7b04883
日期:2017.8.30
combination of structural, biochemical, and spectroscopic approaches. Refinement of the PFL-AE crystalstructure reveals Na+ as the most likely ion present in the solved structures, and pulsed electron nuclear double resonance (ENDOR) demonstrates that the same cation site is occupied by 23Na in the solution state of the as-isolated enzyme. A SAM carboxylate-oxygen is an M+ ligand, and EPR and circular dichroism
fluorescent detection of L-Met with high selectivity and sensitivity in water using a cationic pillar[5]arene-based chemosensor (AWP5). When various L-amino acids are added to the AWP5 water solution, only L-Met can induce fluorescence in AWP5 at λem = 520 nm, showing dramatic enhancement; thus, other amino acid do not interfere in the L-Met recognitionprocess. AWP5 also shows high sensitivity for L-Met
大号-蛋氨酸(大号-Met)是人体的必需氨基酸。水溶液中L -Met的检测非常重要。在本文中,我们报告了一种使用阳离子柱[5]芳烃基化学传感器(AWP5)对L - Met进行荧光检测的高效方法,该方法在水中具有高选择性和灵敏度。当各种大号α-氨基酸被添加到AWP5水溶液,仅大号-Met可诱导荧光AWP5在λ EM = 520纳米,表示戏剧性的增强; 因此,其他氨基酸不会干扰L -Met识别过程。AWP5还显示了对水中L -Met的高灵敏度,AWP5对L -Met的最低检测限为5.46×10 -7 mol L -1。