Publications by authors named "Madhushri Varunjikar"

Shotgun proteomics can be applied to identify and study insect species in diverse research areas such as agriculture, forensics, biodiversity conservation, and food safety. In this chapter, we have provided a detailed protocol for shotgun proteomics analytical methods involving enzymatic digestion of insect proteins using trypsin, separation using high-performance liquid chromatography, and detection of separated peptides using high-resolution mass spectrometry. The protocol also covers the utilization of bioinformatics software for protein identification and spectral library building, proposing both proteomic database-dependent and independent methods.

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Seafood fraud has become a global issue, threatening food security and safety. Adulteration, substitution, dilution, and incorrect labeling of seafood products are fraudulent practices that violate consumer safety. In this context, developing sensitive, robust, and high-throughput molecular tools for food and feed authentication is becoming crucial for regulatory purposes.

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The food and feed sector in Europe is rapidly evolving to address contemporary challenges, striving for fairer, safer, greener and more sustainable food systems. This includes the exploration of new protein sources for human consumption and animal feed such as protein derived from insects, algae or novel plant-derived proteins, and the re-evaluation of existing sources like processed animal protein (PAP). To generate reliable data on the diverse array of emerging protein sources for future food and feed safety assessments, a growing demand for the development and implementation of advanced analytical techniques exists.

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It has long been known that biological species can be identified from mass spectrometry data alone. Ten years ago, we described a method and software tool, compareMS2, for calculating a distance between sets of tandem mass spectra, as routinely collected in proteomics. This method has seen use in species identification and mixture characterization in food and feed products, as well as other applications.

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Atlantic salmon aquaculture is expanding, and with it, the need to find suitable replacements for conventional protein sources used in formulated feeds. Torula yeast (Cyberlindnera jadinii), has been identified as a promising alternative protein for feed and can be sustainably cultivated on lignocellulosic biomasses. The present study investigated the impact of torula yeast on the growth performance and gut microbiome of freshwater Atlantic salmon.

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Article Synopsis
  • Two strains, C5pp and C7, are capable of degrading the pesticide carbaryl using carbaryl hydrolase (CH), which breaks down carbaryl into 1-naphthol and methylamine.
  • The enzyme CH exhibits significantly higher activity in the periplasm compared to the cytoplasm, indicating that its transmembrane domain and signal peptide are important for its proper folding and localization.
  • The findings suggest that organizing metabolic pathways in different cellular compartments can enhance the efficiency of carbaryl degradation while minimizing toxicity from byproducts like 1-naphthol.
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Pseudomonas sp. strain C7 isolated from sediment of Thane creek near Mumbai, India, showed the ability to grow on glucose and carbaryl in the presence of 7.5 and 3.

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