A Semisynthetic Fluorescent Sensor Protein for Glutamate
摘要:
We report the semisynthesis of a fluorescent glutamate sensor protein on cell surfaces. Sensor excitation at 547 nm yields a glutamate-dependent emission spectrum between 550 and 700 nm that can be exploited for ratiometric sensing. On cells, the sensor displays a ratiometric change of 1.56. The high sensitivity toward glutamate concentration changes of the sensor and its exclusive extracellular localization make it an attractive tool for glutamate sensing in neurobiology.
[EN] FLUORESCENT BISPHOSPHONATE ANALOGS<br/>[FR] ANALOGUES DE BISPHOSPHONATES FLUORESCENTS
申请人:UNIV SOUTHERN CALIFORNIA
公开号:WO2016161407A1
公开(公告)日:2016-10-06
Fluorescent probes based on N-heterocyclic bisphosphonates or their phosphonocarboxylate analogues are provided. The probes have variable spectroscopic properties, bone mineral binding affinities, and pharmacological activities. Methods for preparing the probes include the use of two complementary linking strategies, one involving an amino group and the other involving a chloride group as a precursor to an amino group. In other versions, bifunctional N-heterocyclic bisphosphonates are provided having an amino group and an azido group as linking moieties. In some versions, the linking chemistry allows attachment of a wide selection of fluorescent dyes in the visible to near-infrared range to any of three clinically important heterocyclic bisphosphonates.
TIACUMICIN DERIVATIVES AND THEIR USE AS ANTIBIOTICS
申请人:Universität Zürich
公开号:EP3508492A1
公开(公告)日:2019-07-10
The invention relates to a compound according to formula (1)
wherein R1 to R4 and X are independently from each other a small functional group and R5 is -OH, or -O-Ln-Rap-Rbq-Lt-Rar-Rbs-Re, -O-Ln-Rbq-Rd-Lt-Rbs-Re with L being an alkyl linker, Ra being carbonyl, carboxyl or carboxamide, Rb being a cyclic moiety, Rd being a polyether linker and Re being a small functional end group, fluorescent dye or antibiotic with the proviso that the compound is not fidaxomicin.
Furthermore, the invention relates to the use of the compound in the treatment of disease and the use in treating infections and/or bacterial infections caused by drug resistant bacteria.
Commercially available 2′-O-pivaloyloxymethyl (PivOM) phosphoramidites were employed in an SPS protocol for RNA 5′ azides. The utility of the N3-RNAs in CuAAC and SPAAC was demonstrated by RNA 5′ labeling, chemical ligation including fragment joining and cyclization, and bioconjugation. As a result, several new RNA conjugates that may be valuable tools for studies on biological events such as innate
Synthesis and Spectroscopic Characterization of Fluorophore-Labeled Oligospiroketal Rods
作者:Anne Techen、Sylvia Czapla、Kristian Möllnitz、Dennis Budach、Pablo Wessig、Michael U. Kumke
DOI:10.1002/hlca.201200616
日期:2013.11
attachment of the dyes was accomplished by 1,3‐dipolar cycloaddition between alkynes and azides (‘click’ reaction) and is a prime example for a novel class of sensor constructs. Especially, the attachment of two (different) fluorophores on opposite sides of the molecular rods paves the way to new sensor systems with less bulky (compared to the conventional DNA‐ or protein‐based concepts), nevertheless rigid
研究了由完善的荧光团与基于螺烷型结构的刚性分子棒组成的荧光探针在不同溶剂条件下的荧光性质。染料的附着是通过炔烃与叠氮化物之间的1,3-偶极环加成反应(“点击”反应)完成的,这是新型传感器构造的一个主要例子。特别是,对分子杆的相对侧的两个(不同的)的荧光团的附接铺平了道路到新的传感器系统与体积较小(相对于传统的基于DNA或蛋白质的概念),不过刚性间隔构建体,例如,用于基于FRET的传感应用。在MeOH中进行了详细的光物理特性(和基本的H 2 O / MeOH混合物),用于我的含羧基)杆构建体,II),含羧基杆构建体III)同时含有羧基和羧基杆构建体,和IV)杆构建体含有pyr和per部分。对于每种染料(对),合成并研究了具有不同螺环单元数的两个杆长。棒构建体在集合以及单分子荧光实验中针对i)特定棒染料和ii进行了表征)染料染料相互作用。除了MeOH和MeOH / NaOH外,还在胶束系统
Reagents and Methods for Appending Functional Groups to Proteins
申请人:Raines Ronald T.
公开号:US20080020942A1
公开(公告)日:2008-01-24
Methods and reagents for site-selective functionalization of peptides and proteins. The methods most generally involve the reaction of a thioester with hydrazine. Reagents include bifunctional reagents of formula:
H
2
N—NH—CH
2
-M-L-FG
and salts thereof where M is a single bond or a chemical group carrying a non-bonding electron pair, such as —C(O)NR′—, where R′ is H, or an alkyl or aryl group; L is an optional linker group as described above; and FG is a functional group having reactivity that is orthongonal to that of the hydrazine group. FG can, among others, be an azide, alkenyl, alkynyl, nitrile (—CN) or triazole group and is preferably an azide group (—N
3
). Methods and reagents can, for example, be combined with intein-mediated protein splicing to link proteins or fragments thereof to various chemical species or to a surface. Surface immobilization of proteins via the methods herein results in immobilized proteins which substantially retain biological activity and is thus useful for the generation of peptide or protein microarrays. Kits for functionalization and/or immobilization of peptides and proteins are provided as well as microarrays of peptides, proteins or both.