121148-01-4Relevant articles and documents
MELANOCORTIN-4 RECEPTOR AGONISTS
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, (2021/05/15)
The present invention relates to a compound exhibiting excellent agonist activity against melanocortin receptors. More specifically, the present invention relates to a compound of Formula 1, a pharmaceutical composition comprising the compound as an activ
Superior HIV-1 TAR Binders with Conformationally Constrained R52 Arginine Mimics in the Tat(48–57) Peptide
Bhosle, Govind S.,Kharche, Shalmali,Kumar, Santosh,Sengupta, Durba,Maiti, Souvik,Fernandes, Moneesha
, p. 220 - 226 (2018/01/22)
We report a 100-fold increase in binding affinity of the Tat(48–57) peptide to HIV-1 transcriptional activator-responsive element (TAR) RNA by replacing Arg52, an essential and critical residue for Tat's specific binding, with (2S,4S)-4-guanidinoproline. The resulting αTat1M peptide is a far superior binder than γTat1M, a peptide containing another conformationally constrained arginine mimic, (2S,4S)-4-amino-N-(3-guanidinopropyl)proline, or even the control Tat peptide (CtrlTat) itself. Our observations are supported by circular dichroism (CD), isothermal titration calorimetry (ITC), gel electrophoresis and UV spectroscopy studies. Molecular dynamics simulations suggest increased interactions between the more compact αTat1M and TAR RNA, relative to CtrlTat. The CD signature of the RNA itself remains largely unchanged upon binding of the peptides. The Tat mimetics further have better cell uptake properties than the control Tat peptide, thus increasing their potential application as specific TAR-binding molecules.
Antibacterial and anti-TB tat-peptidomimetics with improved efficacy and half-life
Bhosle, Govind S.,Nawale, Laxman,Yeware, Amar M.,Sarkar, Dhiman,Fernandes, Moneesha
, p. 358 - 369 (2018/05/22)
Non-natural antimicrobial peptides are ideal as next-generation antibiotics because of their ability to circumvent the problems of drug resistance and in vivo instability. We report novel all-α- and α,γ-mixed Tat peptide analogues as potential antibacterial and anti-TB agents. These peptides have broad spectrum antibacterial activities against Gram-positive (MICs 0.61 ± 0.03 to 1.35 ± 0.21 μM with the peptide γTatM4) and Gram-negative (MICs 0.71 ± 0.005 to 1.26 ± 0.02 μM with γTatM4) bacteria and are also effective against active and dormant forms of Mycobacterium tuberculosis, including strains that are resistant to rifampicin and isoniazid. The introduction of the non-natural amino acids of the study in the Tat peptide analogues results in increased resistance to degradation by proteolysis, significantly increasing their half-life. The peptides appear to inhibit bacteria by a membrane disruption mechanism, and have only a low cytotoxic effect on mammalian cells.
PROLINE-BASED NEUROPEPTIDE FF RECEPTOR MODULATORS
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, (2018/09/18)
Neuropeptide FF receptor modulators based on a proline scaffold are provided which offer NPFF receptor potencies in the nanomolar range and antagonistic selectivity for the NPFF 1 receptor. Methods, compounds and compositions for modulating the function o
An ionic liquid containing L-proline moiety as highly efficient and recyclable chiral organocatalyst for Michael addition
Li, Jiang,Li, Xia Bing,Ma, Sha Sha,Liu, Juan,Li, Ben Hao,Li, Bao Lin
, p. 1259 - 1264 (2016/08/12)
A novel chiral ionic liquid containing proline moiety was synthesized. It can be used as a highly efficient and recyclable chiral organocatalyst for Michael addition of cyclohexanone with (E)-β-nitroalkenes in methanol at room temperature. The Michael add
Exploration of labeling by near infrared dyes of the polyproline linker for bivalent-type CXCR4 ligands
Nomura, Wataru,Aikawa, Haruo,Taketomi, Shohei,Tanabe, Miho,Mizuguchi, Takaaki,Tamamura, Hirokazu
, p. 6967 - 6973 (2015/11/11)
We have previously used poly-l-proline linkers for the development of bivalent-type ligands for the chemokine receptor, CXCR4. The bivalent ligands with optimum linkers showed specific binding to CXCR4, suggesting the existence of CXCR4 possibly as a dime
Discovery of a series of novel compounds with moderate anti-hepatitis C virus NS3 protease activity in vitro
Shi, Fangyuan,Zhang, Yingjie,Xu, Wenfang
, p. 5539 - 5545 (2015/11/11)
The hepatitis C virus (HCV) NS3/4A protease that plays an important role in the viral life cycle has been proven to be an excellent target for the discovery of anti-HCV drugs. Enlightened by some P2-triazole and amide compounds, which had been found as HCV NS3 protease inhibitors, we designed and synthesized a series of novel compounds by incorporating different amino acid residues in P1/P1′ and P3/P3′ position to develop novel antiviral agents. The result of enzyme inhibition assay indicated that all the designed compounds showed moderate anti-HCV NS3 protease activity. On the basis of the biological result, a detailed structure-activity relationship (SAR) was derived and discussed.
AZAQUINAZOLINE INHIBITORS OF ATYPICAL PROTEIN KINASE C
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, (2014/04/17)
The present invention provides a compound of formula (I) or a salt thereof, wherein R7, R8, R9, G, and X are as defined herein. A compound of formula (I) and its salts have a PKC inhibitory activity, and may be used to treat proliferative disorders.
HEPATITIS C VIRUS INHIBITORS
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, (2013/05/21)
The invention provides compounds of formula (I): wherein the variables are defined in the specification, or a pharmaceutically-acceptable salt thereof, that are inhibitors of replication of the hepatitis C virus. The invention also provides pharmaceutical compositions comprising such compounds, methods of using such compounds to treat hepatitis C viral infections, and processes and intermediates useful for preparing such compounds.
Remarkable structure effects on chiroptical properties of polyisocyanides carrying proline pendants
Xu, Anqiu,Hu, Guixia,Hu, Yulong,Zhang, Xiuqiang,Liu, Kun,Kuang, Guichao,Zhang, Afang
, p. 2003 - 2014 (2013/09/23)
Chiral polymers with simple chemical structures and high helical conformation stabilities are important for their applications as chiral supports and asymmetrical catalysts. We report herein the synthesis of a series of aliphatic polyisocyanides carrying proline pendants of different chiralities, and an investigation of the effects of the chemical structures of these pendants on the chiroptical properties of the polymers. The configuration of the chiral center at the 4-position of the proline pendants was changed from S to R to check its effect on the handedness of the helical conformation. To examine the effects of steric hindrance on the stabilities of the helical conformation for these aliphatic representatives, proline pendants with various substituents at both the carboxyl and amine terminals were designed. To further examine the steric effects of the proline pendants, aromatic counterparts were also prepared. In the latter case, the effects of hydrogen bonds between pendant units on the enhancement and stabilities of the helical conformation were investigated by switching from the ester to an amide linkage. The Cotton effects and signal intensities of both aliphatic and aromatic polyisocyanides from circular dichroism spectroscopy were compared based on the bulkiness of the pendant groups, solvent polarities, and solution temperatures. It was found that highly stable helical conformations of polyisocyanides could be imposed by small bulky monoproline pendants. Twisted sisters: Polyisocyanides with various proline-based pendant groups were synthesized and their chiroptical properties investigated. These chiral polymers show unprecedented stable helical conformations in different solvents at various temperatures, even in the absence of strong hydrogen-bonding interactions between the pendant groups (see picture). Copyright