A Mismatch-Selective Bifunctional Rhodium−Oregon Green Conjugate: A Fluorescent Probe for Mismatched DNA
摘要:
A fluorescent metallointercalator conjugate that selectively targets DNA base mismatches has been synthesized by coupling an organic fluorophore to a bulky Rh intercalator containing the chrysenequinone diimine ligand. Ion pairing between the cationic Rh and anionic fluorophore moieties dramatically quenches the fluorescence of the conjugate in solution and in the presence of matched DNA. However, in the presence of mismatched DNA, the fluorescence of the conjugate is increased >300%. This increase in fluorescence is attributed to the loss in intramolecular quenching associated with DNA binding; intercalation of the Rh moiety into the mismatched site can lead to electrostatic repulsion of the anionic fluorophore away from the DNA phosphate backbone and Rh. Denaturing PAGE experiments with 32P-labeled oligonucleotides indicate that the conjugate selectively binds the mismatched DNA with a binding affinity of 6 x 105 M-1 and, upon irradiation, cleaves the DNA backbone neighboring the mismatched site.
Toward Chemical Ribonucleases. 2. Synthesis and Characterization of Nucleoside-Bipyridine Conjugates. Hydrolytic Cleavage of RNA by Their Copper(II) Complexes
As part of our program to develop chemicalribonucleases that cleave RNA by phosphodiester hydrolysis, a systematic study of covalently linked nucleoside-2,2'-bipyridine (bpy) conjugates is described
Compounds and methods for nucleic acid mismatch detection
申请人:Barton K. Jacqueline
公开号:US20070224612A1
公开(公告)日:2007-09-27
In accordance with the present invention there are provided sterically demanding intercalators. These compounds are useful for detection of a base-pair mismatch, such as by measuring fluorescence of complexes formed by the compounds of the invention and nucleic acid duplexes. The compounds are also capable of catalyzing photolytic cleavage of nucleic acids.
MODAK, ANIL S.;GARD, JANICE K.;MERRIMAN, MICHAEL C.;WINKELER, KIMBERLY A.+, J. AMER. CHEM. SOC., 113,(1991) N, C. 283-291
作者:MODAK, ANIL S.、GARD, JANICE K.、MERRIMAN, MICHAEL C.、WINKELER, KIMBERLY A.+
DOI:——
日期:——
IMMUNOASSAY FOR SOLUBLE PD-L1
申请人:Ayanoglu Gulesi
公开号:US20160069900A1
公开(公告)日:2016-03-10
The present disclosure describes two matched antibody pairs for use in a sandwich immunoassay for detecting and quantifying soluble PD-L1 in liquid samples, as well as an electrochemiluminescence sandwich immunoassay that has been optimized and validated with one of the matched pairs.