Category: 169396-92-3

Zhang, Zhaoda published the artcileHeteroditopic Binding of Magnetic Resonance Contrast Agents for Increased Relaxivity, Recommanded Product: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, the publication is Angewandte Chemie, International Edition (2011), 50(11), 2621-2624, S2621/1-S2621/12, database is CAplus and MEDLINE.

We have shown that the small structural perturbation of incorporating a PNA (peptide nucleic acid) group into a fibrin-targeted contrast agent has a profound impact on relaxivity. The PNA moiety increases mol. weight by 3% but increases relaxivity by 50% compared to Gd2-Gly2-Pep-Gd2. The effect of the PNA group on relaxivity is the equivalent of synthesizing an agent with six GdDTPA moieties to achieve equivalent relaxivity. The PNA group has a modest pos. impact on fibrin binding and serves to rigidify the N-terminal portion of the mol. upon fibrin binding. Importantly, the PNA group does not increase non-specific protein binding. As a result, relaxivity of Gd2-T-Pep-Gd2 bound to fibrin is more than 50% increased compared to Gd2-Pep-Gd2 while the relaxivity of the two compounds in plasma is comparable. This should result in much greater clot blood contrast for Gd2-T-Pep-Gd2.

Angewandte Chemie, International Edition published new progress about 169396-92-3. 169396-92-3 belongs to pyrimidines, auxiliary class Pyrimidine,Carboxylic acid,Amine,Amide,Others,PNA, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, and the molecular formula is C7H11N3O2, Recommanded Product: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia

Novosjolova, Irina published the artcile2-Methoxypyridine as a Thymidine Mimic in Watson-Crick Base Pairs of DNA and PNA: Synthesis, Thermal Stability, and NMR Structural Studies, Name: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, the publication is ChemBioChem (2017), 18(21), 2165-2170, database is CAplus and MEDLINE.

The development of nucleic acid base-pair analogs that use new modes of mol. recognition is important both for fundamental research and practical applications. The goal of this study was to evaluate 2-methoxypyridine as a cationic thymidine mimic in the A-T base pair. The hypothesis was that including protonation in the Watson-Crick base pairing scheme would enhance the thermal stability of the DNA double helix without compromising the sequence selectivity. DNA and peptide nucleic acid (PNA) sequences containing the new 2-methoxypyridine nucleobase (P) were synthesized and studied by using UV thermal melting and NMR spectroscopy. Introduction of P nucleobase caused a loss of thermal stability of ≈10°C in DNA-DNA duplexes and ≈20° C in PNA-DNA duplexes over a range of mildly acidic to neutral pH. Despite the decrease in thermal stability, the NMR structural studies showed that P-A formed the expected protonated base pair at pH 4.3. Our study demonstrates the feasibility of cationic unnatural base pairs; however, future optimization of such analogs will be required.

ChemBioChem published new progress about 169396-92-3. 169396-92-3 belongs to pyrimidines, auxiliary class Pyrimidine,Carboxylic acid,Amine,Amide,Others,PNA, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, and the molecular formula is C26H26N4O7, Name: 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia

Socher, Elke published the artcileDual fluorophore PNA FIT-probes – extremely responsive and bright hybridization probes for the sensitive detection of DNA and RNA, Quality Control of 169396-92-3, the publication is Organic & Biomolecular Chemistry (2012), 10(36), 7363-7371, database is CAplus and MEDLINE.

Fluorescently labeled oligonucleotides are commonly employed as probes to detect specific DNA or RNA sequences in homogeneous solution Useful probes should experience strong increases in fluorescent emission upon hybridization with the target. Dual labeled peptide nucleic acid probes were developed which signal the presence of complementary DNA or RNA by up to 450-fold enhancements of fluorescence intensity. This enabled the very sensitive detection of a DNA target (40 pM LOD), which was detectable at less than 0.1% of the beacon concentration In contrast to existing DNA-based mol. beacons, this PNA-based method does not require a stem sequence to enforce dye-dye communication. Rather, the method relies on the energy transfer between a “smart” thiazole orange (TO) nucleotide, which requires formation of the probe-target complex in order to become fluorescent, and terminally appended acceptor dyes. To improve upon fluorescence responsiveness the energy pathways were dissected. Hydrophobic, spectrally mismatched dye combinations allowed significant (99.97%) decreases of background emission in the absence of a target. By contrast, spectral overlap between TO donor emission and acceptor excitation enabled extremely bright FRET signals. This and the large apparent Stokes shift (82 nm) suggests potential applications in the detection of specific RNA targets in biogenic matrixes without the need of sample pre-processing prior to detection.

Organic & Biomolecular Chemistry published new progress about 169396-92-3. 169396-92-3 belongs to pyrimidines, auxiliary class Pyrimidine,Carboxylic acid,Amine,Amide,Others,PNA, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, and the molecular formula is C14H14N2O2, Quality Control of 169396-92-3.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia

Kummer, Susann published the artcileFluorescence imaging of influenza H1N1 mRNA in living infected cells using single-chromophore FIT-PNA, Safety of 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, the publication is Angewandte Chemie, International Edition (2011), 50(8), 1931-1934, S1931/1-S1931/22, database is CAplus and MEDLINE.

The FIT-PNA probes used in this work contain a single thiazole orange (TO) intercalator serving as artificial fluorescent nucleobase. These probes respond to changes of the local structure in the vicinity of the dye rather than to the more global changes of conformation that confer fluorescence signaling by dual-labeled mol. beacons. Herein we demonstrate the advantageous properties of FIT-PNA probes in the imaging of mRNA from an influenza virus strain belonging to the same subtype as the recently emerged swine virus (A/Mexico/1/2009, H1N1).

Angewandte Chemie, International Edition published new progress about 169396-92-3. 169396-92-3 belongs to pyrimidines, auxiliary class Pyrimidine,Carboxylic acid,Amine,Amide,Others,PNA, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, and the molecular formula is C26H26N4O7, Safety of 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia

Kummer, Susann published the artcilePNA FIT-Probes for the Dual Color Imaging of Two Viral mRNA Targets in Influenza H1N1 Infected Live Cells, Synthetic Route of 169396-92-3, the publication is Bioconjugate Chemistry (2012), 23(10), 2051-2060, database is CAplus and MEDLINE.

Fluorogenic hybridization probes that allow RNA imaging provide information as to how the synthesis and transport of particular RNA mols. is orchestrated in living cells. The authors explored the peptide nucleic acid (PNA)-based FIT-probes in the simultaneous imaging of two different viral mRNA mols. expressed during the replication cycle of the H1N1 influenza A virus. PNA FIT-probes are non-nucleotidic, nonstructured probes and contain a single asym. cyanine dye which serves as a fluorescent base surrogate. The fluorochrome acts as a local intercalator probe and reports hybridization of target DNA/RNA by enhancement of fluorescence. Though multiplexed hybridization probes are expected to facilitate the anal. of RNA expression, there are no previous reports on the dual color imaging of two different viral mRNA targets. The authors developed a set of two differently colored PNA FIT-probes that allow the spectrally resolved imaging of mRNA coding for neuraminidase (NA) and matrix protein 1 (M1); proteins which execute distinct functions during the replication of the influenza A virus. The probes were characterized by a wide range of applicable hybridization temperatures The same probe sequence enabled live-cell RNA imaging (at 37°) as well as real-time PCR measurements (at 60° annealing temperature). This facilitated a comprehensive anal. of RNA expression by quant. (qPCR) and qual. (imaging) means. Confocal laser scanning microscopy showed that the viral-RNA specific PNA FIT-probes neither stained noninfected cells nor cells infected by a control virus. The joint use of differently colored PNA FIT-probes in this feasibility study revealed significant differences in the expression pattern of influenza H1N1 mRNAs coding for NA or M1. These experiments provide evidence for the usefulness of PNA FIT-probes in studies on the temporal and spatial progression of mRNA synthesis in living cells for two mRNA species.

Bioconjugate Chemistry published new progress about 169396-92-3. 169396-92-3 belongs to pyrimidines, auxiliary class Pyrimidine,Carboxylic acid,Amine,Amide,Others,PNA, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetamido)acetic acid, and the molecular formula is C26H26N4O7, Synthetic Route of 169396-92-3.

Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia