Preliminary characterisation of two early meiotic wheat proteins after identification through 2D gel electrophoresis proteomics

Genetic-based approaches-including mutant screens population, microarray analysis, cloning and transgenesis have expanded our knowledge of gene function during meiosis in plants. Nonetheless, genetic tools are not without limitations. One alternative approach to studying meiosis plants, especially in polyploidy as Triticum aestivum L. (wheat bread), is proteomics. However, the proteins using proteomics-based approach is rarely depicted, with only two early learning efforts reported plant meiosis. Here, we report the initial investigation meiosis wheat bread using proteomics.

Five places differently expressed proteins were identified using 2D gel electrophoresis (2DGE) in the protein extracts of the four stages of meiosis were collected and three genotypes (wild-type Chinese Spring, ph1b and ph2a wheat mutant lines). mass spectrometry (MS / MS) identification tandem peptides from this protein led to the isolation and characterization of full-length clones of wheat Speckle-type POZ protein, a SF21-like protein and HSP70, and partial coding sequence of a hexose transporter.

Significantly, the function is suspected of Speckle-type POZ protein and HSP70 was confirmed using in vitro DNA binding test. Through the use of 2DGE proteomics approach, we show that proteomics is an alternative to the genetic-based approach when studying meiosis in wheat. More importantly, we reported a potential role for Speckle-type POZ protein and HSP70 in a chromosome pair during the early stages of meiosis in bread wheat.

Improved quantification of therapeutic proteins covalently aggregate by non-reducing capillary gel electrophoresis using sodium sulphate hexadecyl (CE-SHS)

Capillary gel electrophoresis (CGE) using sodium dodecyl sulphate (SDS-CGE or CE-SDS) is commonly used in the biotechnology industry to assess the purity of the complex therapy during the manufacturing process optimization and also for commercial release and stability testing. However, for therapeutic protein mAb-1 and mAb-2, non-reducing (NR) CE-SDS resulted in higher than expected% aggregates were much lower the purity obviously relative to the purity reported by complementary methods, such as Size Exclusion Chromatography (SEC ). In addition, a strong dependence of the protein load at the aggregate level was observed which prevents any reasonable assessment of the value of true purity.

The solution is to supplement the relatively hydrophobic SDS detergent hexadecyl sodium sulfate (SHS) in buffer gel sieving matrix protein that virtually eliminates the burden of dependency and reduce the value of the aggregate% to the level expected when compared to the SEC. Analytical ultracentrifugation (AUC) was used to help confirm the accuracy of the results of the SEC. This work underscores how to use detergents in addition to SDS in CGE applications can be valuable in commercial biological space and give examples of how the SEC can be used to confirm the accuracy of the data CGE.

 Preliminary characterisation of two early meiotic wheat proteins after identification through 2D gel electrophoresis proteomics
Preliminary characterisation of two early meiotic wheat proteins after identification through 2D gel electrophoresis proteomics

Production of high-quality two-dimensional gel electrophoresis profiles of samples of marine medaka using Trizol-based protein extraction approaches.

Medaka Sea is one of the most popular models of fish species for Ecotoxicology and environmental research and study of proteomics is a useful tool for understanding the medaka molecular response after exposure to different environmental stresses. High-quality protein sample preparation is the key to producing high-quality two-dimensional gel electrophoresis (2-DE) results for proteomics analysis. In recent years, the extraction of protein-based Trizol has gained popularity because of its performance promise in producing high-quality 2-DE and comfort method.

Three Trizol-based approach (Trizol method, the method and the method of Trizol Trizol aliquots with commercial cleaning kit) is used to extract protein from marine samples medaka and 2-DE profiles produced. 2-DE profile quality and effectiveness of extraction methods were evaluated. For comparison, two common protein extraction method (method of lysis buffer and trichloroacetic acid (TCA) / acetone precipitation extraction) are also applied in parallel to Trizol based approaches.Any three Trizol-based approach produces high-quality 2-DE profiles of marine medaka compared with both methods of lysis buffer and TCA / acetone precipitation extraction.

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In addition, the Trizol method with clean-up kit produced the best commercial 2-DE profile in terms of the clarity of the background, the number of spots and resolution proteins.Trizol based approach offered a better choice than traditional protein extraction method for 2-DE analysis of medaka sea. A modified version of the method Trizol with commercial clean-up kit was shown to produce the best 2-DE profile.

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