Plant Protein Extraction
Plant Protein Extraction - Related Videos
11:06
Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts
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Cited by 27 •
2016
Three heat precipitation methods are presented that effectively remove more than 90% of host cell proteins (HCPs) from tobacco extracts prior to any other purification step. The plant HCPs irreversibly aggregate at temperatures above 60 °C.
10:18
Analysis of Protein Import into Chloroplasts Isolated from Stressed Plants
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Cited by 12 •
2016
Here we describe a new method to study protein import into isolated chloroplasts under stress. The method is rapid and straightforward, and can be applied to study the consequences of different stress conditions for chloroplast protein import, and the corresponding regulatory mechanisms.
10:54
Extraction of Plant-based Capsules for Microencapsulation Applications
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Cited by 5 •
2016
This protocol/manuscript describes a streamlined process for the production of sporopollenin exine capsules (SECs) from Lycopodium clavatum spores and for the loading of hydrophilic compounds into these SECs.
10:37
Procedure to Evaluate the Efficiency of Flocculants for the Removal of Dispersed Particles from Plant Extracts
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Cited by 6 •
2016
The design-of-experiments procedure presented here allows the evaluation of different flocculants in terms of their ability to aggregate dispersed particles in plant extracts, thus reducing turbidity and the costs of downstream processing.
02:36
Single-Cell Analysis of Gene Expression from Plant-Extracted Pathogens
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2026
Source: Rufián, J. S., et al. Single-Cell Analysis of the Expression of Pseudomonas syringae Genes within the Plant Tissue. J. Vis. Exp. (2022).This video demonstrates a method for analyzing gene expression in plant-extracted pathogenic bacteria at the single-cell level using a fluorescently tagged transcription factor. Confocal imaging reveals heterogeneity in virulence gene expression, highlighting functional diversity within a clonal bacterial population.
FAQs
The extraction buffer creates chemical conditions that help keep target proteins soluble and stable during tissue processing. Salts and stabilizing agents support recovery by reducing unwanted changes before separation. Because protein abundance and structure affect later measurements, selecting appropriate buffer conditions is important when extracts will be used for biochemical characterization or antibody-recognition studies.
Centrifugation separates the soluble protein-containing fraction from disrupted cell material and other insoluble components. This clarification step produces a more suitable extract for downstream concentration, purification, or analysis. In immunological experiments, removing insoluble material can improve consistency when comparing antigen preparations or assessing antibody responses against proteins recovered from different plant samples.
Precipitation can concentrate proteins after extraction, whereas chromatography provides a purification approach for separating proteins based on their behavior during the purification process. The choice depends on the intended analysis and the required level of separation. Concentration may be sufficient for some biochemical or immunological assays, while chromatography is more appropriate when a cleaner or more selectively isolated protein preparation is needed.
Recovered proteins may serve as antigens, immunogens, or assay targets. As antigens or assay targets, they support studies of antibody recognition, while use as immunogens can help investigate host responses. In plant-associated pathogen research, these preparations provide molecular material for examining interactions between pathogen-related proteins and immune responses, with applications in diagnostic, vaccine, and host-pathogen investigations.
A consistent workflow begins with mechanical tissue disruption, followed by mixing with a buffered solution containing salts or stabilizing agents. The mixture is then centrifuged to clarify the extract, after which proteins may be concentrated by precipitation or further purified by chromatography. Keeping these stages consistent helps preserve protein abundance and structure across samples and improves comparison between experiments.
The resulting preparations can support biochemical analysis as well as immunological measurements of antibody recognition and host responses. Their usefulness depends on retaining relevant protein abundance and structure throughout extraction and processing. In infection-focused studies, this enables researchers to evaluate plant-associated pathogen interactions and develop or assess diagnostic and vaccine-related approaches using defined protein preparations.