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Pharmaceutical industries are interested in Cysteine-stabilized peptides because they offer an array bioactive properties while being highly stable under a range of physiological conditions. However, it is widely appreciated that only a small fraction of this type of peptides have been experimentally discovered while a large number remain unidentified. However, identification of these cysteine-stabilized...
The G-Protein Coupled Receptor (GPCR) proteins are of paramount importance for pharmaceutical research as this single family of proteins is targeted by more than 50% of all modern drugs. Their ligands include but are not limited to small molecules, peptides and photons. Consequently it is vital to know the sites of interaction between the ligand and the receptor. These sites can be used for a multitude...
A phosphorylatable short peptide(pSP) with the amino acid composition of ??LLLRRRDNEYFYVRRLL?? containing two potentially phosphorylatable tyrosine residues was chemically synthesized. This short peptide was characteristic with the isoelectric point of 10.88 and could be positively charged under physiological condition. The ??DNEYFYV?? motif in the pSP is the substrate of Jak2 kinase which was verified...
Human immunodeficiency virus type 1 (HIV-1) integrase (IN) is an essential enzyme in the lifecycle of this virus and also an important target for the study of anti-HIV drugs. The binding modes of the wild type IN core domain and the W132G mutant with the hydroxycoumarin compound NSC158393 were investigated by using the "relaxed complex" molecular docking approach and molecular dynamics (MD)...
This work introduce a new conventional method to prepare ternary composite moicrospheres nano beta-tricalcium phosphate/ gelatin/ velvet antler polypeptides by water-in-oil (W/O) emulsion process. The nano beta-tricalcium phosphate (TCP) and velvet antler polypeptides (VAP) are embedded into the gelatin spheres. SEM image indicates the composite spheres have a homogeneous microstructure, a perfect...
PingYu capsule was a novel compound botanical drug, being composed of the extracts from Radix et Rhizoma Ginseng, Fructus Jujubae and Radix et Rhizoma Glycyrrhizae, which were the classical herbal medicines in China. Depression is one of psychological and/or physiological disorders. In the recent decades, depression affected the people's health seriously. This study was designed to demonstrate the...
Hirudin has been well-characterized to be the strongest thrombin inhibitor with no affinity for other peptidases. Hirudin from natural sources is inefficient due to its low abundance in medicinal leech (Hirudo medicinalis). Though recombinant hirudin has been made by many laboratories, technical difficulties have limited recombinant hirudin from being used clinically. One of the difficulties is the...
The overuse of antibiotics has led to a rise in antibiotic resistance of common hospital dwelling bacteria such as Staphylococcusaureus. Novel broad-spectrum antimicrobials that operate without further contributing to a rise in antibiotic resistance are needed to tackle this problem. The effective delivery of antimicrobial peptides, is of interest due to their wide range of activity against gram...
Vascular endothelial growth factor receptor 2 (VEGFR2) plays a very important role on the generation and development of newly-formed tumor vessels. Many antibodies and small molecules have been designed or discovered to target it, which can be used as powerful drugs for tumor patients. However, those molecules have very limited effect or strong malignant side effect, which limits their approval by...
Membrane insertion of small peptides plays important roles in antimicrobial defense, toxin actions, and viral infections. There have been experimental efforts to study this process with carefully designed synthetic peptides. Molecular dynamics simulation techniques are useful tools to study membrane insertion of peptides in atomic details to complement these experimental efforts. We developed a methodology...
The potyvirus coat protein (CP) is involved in aphid transmission, cell-to-cell movement and virus assembly, not only by binding to viral RNA, but also by self-interaction or interactions with other factors. Peptide fragments of genome coatprotein can be used to select nonamers for use in rational vaccine design and to increase the understanding of roles of the immune system in infectious diseases...
Signal peptides are short regions of amino acid residues, which have become a crucial tool in finding new drugs or reprogramming cells for gene therapy. Owing to the rapidly increasing number of protein, it is highly demanded to develop the automated algorithm to identify the signal peptides. Recently, we had adopted a new alignment kernel function to identify secretory proteins. Compared with previous...
We report on the development of an implantable drug delivery system capable of delivering multiple individual doses. This product controls the release of potent therapeutic compounds that might otherwise require frequent injections. The system will provide stable, hermetic storage of therapeutic drugs, such as proteins and peptides, in solid, liquid, or gel form. Because discrete doses are stored...
We report on the design and the implementation of ESCAPE 2.0, the parallel exhaustive conformational search system for peptides. We employed an exhaustive search method for conformational searches, so that ESCAPE 2.0 does not overlook any important conformations that may be overlooked by other systems. Although the previous version of ESCAPE can analyze short peptide segments, we added new functions...
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