School Of Basic And Applied Sciences

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    Homology modeling and molecular docking study of biogenic Muga silk nanoparticles as putative drug-binding system
    (John Wiley and Sons Inc, 2020-12-22T00:00:00) Asapur, Prithvi C.; Sahare, Purushottam D.; Mahapatra, Santosh Kumar; Banerjee, Indrani
    The recent emergence of natural biopolymers as drug delivery vehicles is attributed to their biodegradability and less systemic toxicity. Muga silk nanoparticles were prepared using microwave radiolysis method and were characterized by Fourier transform infrared spectroscopy, circular dichroism, X-ray diffraction and transmission electron microscopy. To find the applicability in the drug delivery system of these nanoparticle and to know the binding site(s), a computational study was carried out. The structure of the Muga protein is predicted using homology modeling, which is further used for molecular docking. The in silico molecular docking between the Muga silk nanoparticles and three United States Food and Drug Administration-approved model drugs of doxorubicin, remdesivir and dexamethasone was performed. The binding capabilities and binding energy of the Muga silk proteins with these drugs are determined. The basic idea of the active site and the residues involved in the binding of the drugs/ligands is also studied. Doxorubicin showed the highest binding affinity of ?8.7�kcal/mol and that of the remdesivir and dexamethasone are found to be ?7.2 and ?7.9 kcal/mol, respectively. Such high binding affinity(ies) would help for slow drug release kinetics and the other two drugs can be loaded when the requirement is for sustained drug release. The data were also validated using the UV�vis. spectroscopy. � 2020 International Union of Biochemistry and Molecular Biology, Inc.
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    Photo-electrochemical Property of Microwave Synthesized Muga Silk Nanoparticles/ZnO/ITO/PET Structure
    (Taylor and Francis Ltd., 2020-12-10T00:00:00) Asapur, Prithvi C.; Shiyani, Tulshi; Mahapatra, S.K.; Bogle, Kashinath A.; Banerjee, Indrani
    Muga silk nanoparticles (MSNP) in the size range of 28�142 nm were synthesized via microwave-assisted radiolysis method. Interestingly, these nanoparticles acquire cuboidal shape and exhibit photoresponsive property, under white light illumination of power 56 mW/cm2 in a photo-electrochemical cell, when fabricated in MSNP/ZnO/ITO/PET flexible device structure. The device was found to be active under visible light illumination and gives photoresponsivity of 0.119 �A/W with the rise/decay time of 0.9/0.6 s, respectively. Such photoresponse of MSNP could serve as an optoelectric biomolecule, which would find its application for next-generation wearable and implantable optoelectronic devices. � 2022 IETE.
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    Spectroscopic analysis of Muga silk nanoparticles synthesized by microwave method
    (Blackwell Publishing Ltd, 2020-04-26T00:00:00) Asapur, Prithvi; Banerjee, Indrani; Sahare, P.D.; Mahapatra, Santosh
    Muga silk nanoparticles (MSNP) were synthesized using a microwave-assisted radiolysis method. The effect of microwave on the Muga protein secondary structures was analyzed. The evolution of the secondary structure from random coils to the ?-sheets was determined by using FTIR, circular dichroism and X-ray diffraction techniques. The results showed that Muga silk fibroin protein contained the primary structure in silk-I state. When the protein was irradiated with microwave, nanoparticle synthesis was possible having silk-II state imparting crystallinity. The silk nanoparticles were characterized by a particle size analyzer and found to be of ~240�nm in size. The optical properties of these nanoparticles were studied by UV�vis. spectroscopy and photoluminescence. For studying thermal properties, differential scanning calorimetry was performed that revealed early glass transition, which could be attributed to the presence of water and proteins. It also revealed that nanoparticles are thermally stable. Such studies are important for understanding more about the MSNP and would be beneficial for their further wide applications. � 2020 International Union of Biochemistry and Molecular Biology, Inc.
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    Spectroscopic analysis of Muga silk nanoparticles synthesized by microwave method
    (Wiley-Blackwell Publishing Ltd, 2020) Asapur, P; Banerjee, I; Sahare, P.D; Mahapatra, S.
    Muga silk nanoparticles (MSNP) were synthesized using a microwave-assisted radiolysis method. The effect of microwave on the Muga protein secondary structures was analyzed. The evolution of the secondary structure from random coils to the ?-sheets was determined by using FTIR, circular dichroism and X-ray diffraction techniques. The results showed that Muga silk fibroin protein contained the primary structure in silk-I state. When the protein was irradiated with microwave, nanoparticle synthesis was possible having silk-II state imparting crystallinity. The silk nanoparticles were characterized by a particle size analyzer and found to be of ~240�nm in size. The optical properties of these nanoparticles were studied by UV�vis. spectroscopy and photoluminescence. For studying thermal properties, differential scanning calorimetry was performed that revealed early glass transition, which could be attributed to the presence of water and proteins. It also revealed that nanoparticles are thermally stable. Such studies are important for understanding more about the MSNP and would be beneficial for their further wide applications. � 2020 International Union of Biochemistry and Molecular Biology, Inc.