Krimper eTud2 (residues 562-746) was cloned into a self-modified His-MBP vector. Protein production procedure was to with Krimper eTud1. The recombinant expressed protein was purified using a HisTrap column (GE Healthcare). The hexahistidine plus MBP tag was removed by TEV protease digestion followed by a second step HisTrap column (GE Healthcare). Protein was further purified using Q and Superdex G75 columns (GE Healthcare).
Histrap column
The HisTrap column is a versatile affinity chromatography tool designed for the purification of histidine-tagged recombinant proteins. It features a prepacked matrix that selectively binds to the histidine-tag, allowing for efficient capture and purification of the target protein.
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331 protocols using histrap column
Recombinant Expression and Purification of Krimper eTud Domains
Krimper eTud2 (residues 562-746) was cloned into a self-modified His-MBP vector. Protein production procedure was to with Krimper eTud1. The recombinant expressed protein was purified using a HisTrap column (GE Healthcare). The hexahistidine plus MBP tag was removed by TEV protease digestion followed by a second step HisTrap column (GE Healthcare). Protein was further purified using Q and Superdex G75 columns (GE Healthcare).
Expression and Purification of mTC/S Proteins
Seleno-methionine Protein Expression Protocol
Harvested cells were lysed using a microfluidizer at 20,000 psi in a buffer containing 50mM Tris pH 8.0, 300mM NaCl, and 5mM BME. Cell lysates were clarified by centrifugation at 20,000xg and filtered through a 0.45μm filter. Lysates were then loaded onto a HisTrap column (GE Healthcare) before washing with 20mM imidazole. The protein was eluted with a linear gradient of imidazole from 0-300mM. Fractions containing protein were pooled and dialysed overnight at 4°C in the presence of TEV in a buffer containing 20mM Tris pH 8.0, 150mM NaCl, 5mM imidazole, and 2mM BME. The following day, proteins were passed over a HisTrap column and the flowthrough collected which was concentrated and passed over a Superdex S200 (GE Healthcare) column equilibrated in 10mM Tris pH7.5, 50mM NaCl and 2mM DTT.
Purification of SpaD Proteins
Purification of DnaK and WT::NR Proteins
Purification of NBX Fusion Proteins
Example 17
TEV protease-cleavable, 6×His-thioredoxin-NBX fusion proteins are expressed in the cytoplasm of E. coli grown in autoinducing media (Formedium) for 24 hours at 30° C. Bacteria are collected by centrifugation, resuspended in buffer A (10 mM HEPES, pH 7.5, 500 mM NaCl, 20 mM Imidazole) and lysed using homogenization. Insoluble material is removed by centrifugation and the remaining soluble fraction is applied to a HisTrap column (GE Biosciences) pre-equilibrated with buffer A. The protein is eluted from the column using an FPLC with a linear gradient between buffer A and buffer B (10 mM HEPES, pH 7.5, 500 mM NaCl, 500 mM Imidazole). The eluted protein is dialyzed overnight in the presence of TEV protease to buffer C (10 mM HEPES, pH 7.5, 500 mM NaCl). The dialyzed protein is applied to a HisTrap column (GE Biosciences) pre-equilibrated with buffer C. 6×His-tagged TEV and 6×His-tagged thioredoxin are bound to the column and highly purified NBX is collected in the flowthrough. NBX proteins are dialyzed overnight to PBS and concentrated to −10 mg/ml.
Expression and Purification of Active S6K1
Phosphorylation of the purified S6K1KD protein, using PDK1, was performed as previously described [17 (link)]. The His-tagged PDK1 protein was produced using a baculovirus expression system, and was purified prior to addition to S6K1KD.
Purification of Soluble DSG3 Proteins
Soluble human DSG3 was expressed as sDSG3-mIgG2aFc composed of the extracellular domain of human DSG3 (aa 1-616) and the Fc portion of mouse IgG2a, and was purified with HiTrap Protein G HP column (GE Healthcare) and eluted with 0.1 M Glycine-HCl (pH 2.7). The eluate was gel-filtrated with Superdex 200HR 10/30 (GE Healthcare).
Glutathione S-transferase (GST)-human DSG3 fusion protein (GST-hDSG3) was expressed in Escherichia coli as a fusion of GST and 125 aa of human DSG3 (aa 491-615) with His-tag. GST-hDSG3 was purified with His-Trap column (GE Healthcare) for use as an antigen for ELISA.
Expression and Purification of Arabidopsis JMJ13 Catalytic Domain
Purification of RNAP holoenzyme and phage proteins
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