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Soni Mishra Deepika Chaturvedi Naresh Kumar Poonam Tandon H.W. Siesler 《Chemistry and physics of lipids》2010,163(2):207-217
Oleic acid (cis-9-octadecenoic acid) is the most abundant cis-unsaturated fatty acid in nature; it is distributed in almost all organisms. In this work, we present a detailed vibrational spectroscopy investigation of Oleic acid by using infrared and Raman spectroscopies. These data are supported by quantum mechanical calculations, which allow us to characterize completely the vibrational spectra of this compound. The equilibrium geometry, harmonic vibrational frequencies, infrared intensities and activities of Raman scattering were calculated by ab initio Hartree-Fock (HF) and density functional theory (DFT) employing B3LYP with complete relaxation in the potential energy surface using 6-311G(d, p) basis set. After a proper scaling the calculated wavenumbers show a very good agreement with the observed values. A complete vibrational assignment is provided for the observed Raman and infrared spectra of Oleic acid. In this work, we also investigate the deviation of vibrational wavenumbers computed with two quantum chemical methods (HF and B3LYP). 相似文献
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N-Glycosylation has long been linked to protein folding and quality control in the endoplasmic reticulum (ER). Recent work has shown that O-linked glycosylation and the corresponding glycosyltransferases also participate in this important function. Notably, Protein O-fucosyltransferase 1 (Ofut1/Pofut1), a soluble, ER localized enzyme that fucosylates Epidermal Growth Factor-like (EGF) repeats, functions as a chaperone involved in the proper localization of the Notch receptor in certain contexts. Pofut2, a related enzyme that modifies Thrombospondin type I repeats (TSRs), has also been hypothesized to play a role in the folding and quality control of TSR-containing proteins. Both enzymes only modify fully folded substrates suggesting that they are able to distinguish between folded and unfolded structures. Pofuts have known physiological relevance and are conserved across metazoans. Though consensus sequences for O-fucosylation have been established and structures of both Pofuts have been studied, the mechanism of how they participate in protein folding is not known. This article discusses past and recent advances made in novel roles for these protein O-glycosyltransferases. 相似文献
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Deepika Dayal Mathur Sachin Deshmukh Himani Kaushik Lalit C. Garg 《Applied microbiology and biotechnology》2010,88(4):877-884
Clostridium perfringens types B and D are responsible for enterotoxaemia, one of the major causes of cattle mortality and is therefore of great economic
concern. The epsilon toxin produced by the organism is the major antigenic determinant and has been directly implicated for
the disease causation. In the present paper, we evaluated the biological activity of the recombinant epsilon toxin (rEtx)
produced as soluble protein in Escherichia coli. The rEtx was purified to near homogeneity by a one-step anion-exchange chromatography. The immunological identity of purified
rEtx was confirmed by Western blotting using a monoclonal antibody against the native toxin. The rEtx formed heptamer in the
Madin–Darby canine kidney (MDCK) cells and synaptosomal membrane of mouse brain and was cytotoxic to the MDCK cells with a
CT50 of 30 ng/ml. The rEtx was highly stable and its thermostability profile related well with its biological activity. The rEtx
was purified in large amounts and exhibited all the properties of native toxin and therefore can be used for the development
of vaccine against the pathogen. 相似文献
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Sharma Deepika Nanjundan J. Singh Lal Parmar Nehanjali Singh K. H. Verma Kumar Sambhav Thakur Ajay Kumar 《Plant Molecular Biology Reporter》2022,40(3):579-594
Plant Molecular Biology Reporter - Indian mustard is an economically important oilseed crop in India; therefore, exploring the genetic diversity of various germplasm collections is quite relevant... 相似文献
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Tripathi Deepika Modi Arusha Smita Shachi Shuchi Narayan Gopeshwar Pandey-Rai Shashi 《Journal of plant biochemistry and biotechnology.》2022,31(1):213-218
Journal of Plant Biochemistry and Biotechnology - Green synthesis of silver nanoparticles (AgNPs) from medicinal plant extracts has gained importance due to its pharmacological potential. In the... 相似文献
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Iyyangar Deepika Kureeckal V. Ramesh Indira Kumar Abhishek Singh Rajal Debnath Himanshu Dubey Pawan Shukla Kangayam M. Ponnuvel S. Manthira Moorthy Gangavarapu Subrahmanyam 《Entomologia Experimentalis et Applicata》2024,172(5):372-382
Sericulture, the practice of rearing silkworms for the production of silk, is an essential agro-based industry in several countries. However, silkworms are susceptible to a variety of diseases caused by viruses, bacteria and parasites, which may have a significant negative impact on global silk production. Traditional methods of pathogen identification, such as microscopy and laboratory culturing, have limitations in terms of accuracy and efficiency. The development of molecular techniques for pathogen identification has revolutionised the field of sericulture over the last decade. Genomic DNA and RNA-based molecular techniques allow for the rapid and accurate detection of disease-causing pathogens in silkworms. Molecular diagnosis has several advantages over traditional methods, including increased sensitivity and specificity, shorter turnaround time and the ability to detect pathogens that are difficult to culture or visualise under a microscope. Molecular techniques have been applied to detect several important pathogens of silkworms, including Nosema sp., nucleopolyhedrovirus, cypovirus, iflavirus and bidensovirus. The use of molecular diagnostics in sericulture is immensely important as the demand for high-quality silk increases globally and the assessment of emerging pathogens associated with crop loss is essential. Major advancements in the improvement and application of molecular methods for diagnosing widespread silkworm pathogens are discussed. 相似文献
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Michael A. Gomez Z. Daniel Lin Theodore Moll Raj Deepika Chauhan Luke Hayden Kelley Renninger Getu Beyene Nigel J. Taylor James C. Carrington Brian J. Staskawicz Rebecca S. Bart 《Plant biotechnology journal》2019,17(2):421-434
Cassava brown streak disease (CBSD) is a major constraint on cassava yields in East and Central Africa and threatens production in West Africa. CBSD is caused by two species of positive‐sense RNA viruses belonging to the family Potyviridae, genus Ipomovirus: Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV). Diseases caused by the family Potyviridae require the interaction of viral genome‐linked protein (VPg) and host eukaryotic translation initiation factor 4E (eIF4E) isoforms. Cassava encodes five eIF4E proteins: eIF4E, eIF(iso)4E‐1, eIF(iso)4E‐2, novel cap‐binding protein‐1 (nCBP‐1), and nCBP‐2. Protein–protein interaction experiments consistently found that VPg proteins associate with cassava nCBPs. CRISPR/Cas9‐mediated genome editing was employed to generate ncbp‐1, ncbp‐2, and ncbp‐1/ncbp‐2 mutants in cassava cultivar 60444. Challenge with CBSV showed that ncbp‐1/ncbp‐2 mutants displayed delayed and attenuated CBSD aerial symptoms, as well as reduced severity and incidence of storage root necrosis. Suppressed disease symptoms were correlated with reduced virus titre in storage roots relative to wild‐type controls. Our results demonstrate the ability to modify multiple genes simultaneously in cassava to achieve tolerance to CBSD. Future studies will investigate the contribution of remaining eIF4E isoforms on CBSD and translate this knowledge into an optimized strategy for protecting cassava from disease. 相似文献
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