Publications by authors named "Gugan Kothandan"

Bovine serum albumin (BSA) plays a crucial role as a carrier protein in plasma, binding various ligands, including drugs. Understanding the interaction between BSA and saquinavir, an antiretroviral drug, is essential for predicting its pharmacokinetics and pharmacodynamics. We employed spectroscopic approaches, including circular dichroism spectrometry and fluorescence spectroscopy, to investigate the binding of saquinavir to BSA.

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The crystal structure of the title compound CHNOS features hydrogen-bonding and C-H⋯π inter-actions. Hirshfeld surface analysis revealed that H⋯H, C⋯H/H⋯C and O⋯H/H⋯O inter-actions make a major contribution to the crystal packing. Docking studies were carried out to determine the binding affinity and inter-action profile of the title compound with EGFR kinase, a member of the ErbB family of receptor tyrosine kinases, which is crucial for processes such as cell proliferation and differentiation.

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Article Synopsis
  • Type 2 Diabetes Mellitus (T2DM) is a global health concern linked to high blood sugar levels and is influenced by gut microbiome metabolites, particularly imidazole propionate (Imp), which disrupt insulin signaling.
  • A proposed therapeutic vaccine targets the enzyme urocanate reductase (UrdA) in gut microbes that produce Imp, using immunoinformatics to identify safe and effective B and T cell epitopes, alongside adjuvants for improved immune response.
  • The research includes structural modeling, molecular docking studies to analyze vaccine interaction with immune receptors, and in silico cloning to ensure optimal expression of the vaccine, aiming to provide a new treatment option for T2DM.
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Visceral leishmaniasis (VL) is a vector-borne neglected tropical protozoan disease with high fatality and no certified vaccine. Conventional vaccine preparation is challenging and tedious. Here in this work, we created a global multiepitope subunit vaccination against VL utilizing innovative immunoinformatics technique based on the extensively conserved epitopic regions of the PrimPol protein of consisting of four subunits which were analyzed and studied, out of which DNA primase large subunit and DNA polymerase α subunit B were evaluated as antigens by Vaxijen 2.

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Tuberculosis is the disease which is caused due to the contagion of Mycobacterium tuberculosis. The multidrug resistance Mycobacterium tuberculosis is the main hassle in the treatment of this worldwide health threats. Pantothenate synthase is a legitimate goal for rational drug designing against Mycobacterium tuberculosis.

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Several phytochemicals with potential for bioactivity can be found in Polygonum minus (PM). The goal of this investigation was to establish the minimally toxic dose of PM for pharmaceutical use. To explain the stability and reactivity of the compounds under study, the lowest unoccupied molecular orbital (LUMO), the highest occupied molecular orbital (HOMO), and the natural bond orbital were all combined.

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Hippocampal subfield atrophy is a prime structural change in the brain, associated with cognitive aging and neurodegenerative diseases such as Alzheimer's disease. Recent developments in genome-wide association studies (GWAS) have identified genetic loci that characterize the risk of hippocampal volume loss based on the processes of normal and abnormal aging. Polygenic risk scores are the genetic proxies mimicking the genetic role of the pre-existing vulnerabilities of the underlying mechanisms influencing these changes.

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Myo-inositol is one of the vital nutritional requirements for the parasites' survival and virulence in the mammalian host. . Myo-inositol-1-phosphate synthase (MIPS) is responsible for the synthesis of myo-inositol in , which plays a vital role in virulence to mammalian hosts.

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Our present work studies the structure-based pharmacophore modeling and designing inhibitor against Gal3 receptor through molecular dynamics (MD) simulations extensively. Pharmacophore models play a key role in computer-aided drug discovery like in the case of virtual screening of chemical databases, drug design and lead optimization. Structure-based methods for developing pharmacophore models are important, and there have been a number of studies combining such methods with the use of MD simulations to model protein's flexibility.

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Salt-inducible kinases 3 (SIK3) belong to the AMPK-related family of kinases, which have been implicated in the regulation of cell metabolism, cell polarity remodelling, and epithelial-mesenchymal transition. Elevated SIK3 expressions in breast cancer cells are shown to contribute to tumorigenesis; however, the underlying mechanism remains to be elucidated. In this study, we demonstrate that SIK3 expression is upregulated and concurrently high expression of SIK3 is associated with poor survival in breast cancer.

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Article Synopsis
  • The Protein Data Bank (PDB) has nearly doubled its crystal structure availability over the last decade, enhancing options for docking studies in drug discovery.
  • Ligand docking-based virtual screening is crucial for identifying new drug candidates by analyzing structures in a database.
  • Our research found that lower resolution structures sometimes performed better in docking studies than those with higher resolution, challenging the assumption that better resolution guarantees better outcomes.
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, causes leishmaniasis, a global health trouble with around 89 different countries and its population under its risk. Replication initiation events have been instrumental in regulating the DNA duplication and as the small subunit of nuclear DNA primase (-PriS) inherits the catalytic site, it plays a vital role in DNA replication. In this study we have aimed PriS for the first time as a prospective target for the application of drug against parasite.

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Article Synopsis
  • The study focuses on two food-derived peptides, RALP and WYT, which have antihypertensive effects by inhibiting both renin and angiotensin-converting enzyme (ACE) in the Renin-Angiotensin System.
  • Molecular docking and dynamics simulations were employed to analyze how these peptides interact with renin and ACE, revealing different binding behaviors that influence their effectiveness.
  • Findings suggest that while the peptides are less effective at binding to renin due to potential displacement from critical areas, they remain stable in ACE's binding site, indicating opportunities for improving their dual-targeting capabilities.
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Growth of textile industries led to production of enormous dye varieties. These textile dyes are largely used, chemically stable and easy to synthesize. But they are recalcitrant and persist as less biodegradable pollutants when discharged into waterbodies.

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There has been a fair bit of understanding on the structure-function relationship of Aquaporins (AQPs) from plants and vertebrates obtained from available X-ray crystallography data. However, there is a lacuna in understanding the structure of AQPs from sanguinivorous insects like the mosquito where it plays a crucial role in survival. In this study, we have built homology models for the Aedes aegypti AQPs, identified key channel lining residues and compared the structure and sequence with orthodox AQPs.

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The nociceptin receptor (NOPR) is an orphan G protein-coupled receptor that contains seven transmembrane helices. NOPR has a distinct mechanism of activation, though it shares a significant homology with other opioid receptors. Previously there have been reports on homology modeling of NOPR and also molecular dynamics simulation studies for a short period.

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C-C chemokine receptor type 1 (CCR1) is a chemokine receptor with seven transmembrane helices and it belongs to the G-Protein Coupled receptor (GPCR) family. It plays an important role in rheumatoid arthritis, organ transplant rejection, Alzheimer's disease and also causes inflammation. Because of its role in disease processes, CCR1 is considered to be an important drug target.

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The HIV-1 envelope glycoprotein gp120 plays a vital role in the entry of virus into the host cells and is a potential antiviral drug target. Recently, indole derivatives have been reported to inhibit HIV-1 through binding to gp120, and this prevents gp120 and CD4 interaction to inhibit the infectivity of HIV-1. In this work, molecular docking, molecular dynamics (MD) and three-dimensional quantitative structure-activity relationship studies were carried out.

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Tankyrases (TNKS) belong to the poly(ADP-ribose)polymerase (PARP) protein super family and play a vital role in the Wnt/β-catenin signaling pathway. TNKS is a potential target for therapeutic intervention against various cancers, heritable diseases (e.g.

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P-glycoprotein (P-gp) is responsible for the multidrug resistance (MDR) and involved in the expulsion of xenobiotics out of cell. In this paper, homology modeling, docking and molecular dynamics simulation (MDS) was performed for the human P-gp desmosdumotin inhibitor. Docking study was carried out in the P-gp nucleotide binding domain 2 (NBD2).

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In this study, we report on modeling of galanin receptor type 3 and its interaction with agonist and antagonists using in silico methodologies. Comparative structural modeling of galanin receptor type 3 was based on multiple templates. With the availability of reported selective galanin receptor type 3 antagonists, docking was carried out into the predicted binding site.

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Chemokine receptor 5 (CCR5) is an important receptor used by human immunodeficiency virus type 1 (HIV-1) to gain viral entry into host cell. In this study, we used a combined approach of comparative modeling, molecular docking, and three dimensional quantitative structure activity relationship (3D-QSAR) analyses to elucidate detailed interaction of CCR5 with their inhibitors. Docking study of the most potent inhibitor from a series of compounds was done to derive the bioactive conformation.

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Chemokine receptor 5 (CCR5) is an integral membrane protein that is utilized during human immunodeficiency virus type-1 entry into host cells. CCR5 is a G-protein coupled receptor that contains seven transmembrane (TM) helices. However, the crystal structure of CCR5 has not been reported.

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Chemokine receptors are G protein-coupled receptors that contain seven transmembrane domains. In particular, CCR2 and CCR5 and their ligands have been implicated in the pathophysiology of a number of diseases, including rheumatoid arthritis and multiple sclerosis. Based on their roles in disease, they have been attractive targets for the pharmaceutical industry, and furthermore, targeting both CCR2 and CCR5 can be a useful strategy.

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In order to explore the interactions between flavones and P-gp, in silico methodologies such as docking and 3D-QSAR were performed. CoMFA and CoMSIA analyses were done using ligand based and receptor guided alignment schemes. Validation statistics include leave-one-out cross-validated R(2) (q(2)), internal prediction parameter by progressive scrambling (Q(*2)), external prediction with test set.

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