Nickel Resin Chromatography
Nickel Resin Chromatography - Related Videos
03:54
Nickel Affinity Chromatography-Based Protein Purification: A Technique to Purify Polyhistidine-Tagged Recombinant Proteins from Bacterial Cell Lysate
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2025
In this video, we demonstrate the nickel affinity chromatography technique to purify histidine-tagged pyrophosphokinase enzymes from Clostridium difficile bacteria.
07:51
Chromatography-based Biomolecule Purification Methods
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2023
In biochemistry, chromatography-based purification methods are employed to isolate compounds from a complex mixture. Two such methods used commonly by biochemists are size-exclusion chromatography and affinity chromatography. In size-exclusion chromatography, a column packed with porous beads separates components of a mixture based on size. On the other hand, affinity chromatography allows for a more specific separation of biomolecules by using a column that is composed of stationary phase,...
02:38
Anion Exchange Resin–Based Detection of Viruses from Bioaerosols
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2026
Source: Schaeffer, J. W., Chandler, et al. Detection of Viruses from Bioaerosols Using Anion Exchange Resin. J. Vis. Exp. (2018).This video demonstrates the detection of viruses from bioaerosols using an anion exchange resin. A liquid impinger containing the resin is used to capture viruses from the air. The resin is collected and treated with a virus lysis buffer containing carrier RNA. The lysate is transferred to a microcentrifuge tube for viral RNA isolation, followed by qRT-PCR to amplify...
08:52
Ion-Exchange Chromatography
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Ion-exchange chromatography is a type of chromatography that separates analytes based on charge. A column is used that is filled with a charged stationary phase on a solid support, called an ion-exchange resin. Strong cation-exchange chromatography preferentially separates out cations by using a negatively-charged resin while strong anion-exchange chromatography preferentially selects out anions by using a positively-charged...
02:54
An Affinity Chromatography Technique for the Purification of a Recombinant Bacterial Protein
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2025
Source: Becker, B., et al. A Simple Fluorescence-based Reporter Assay to Identify Cellular Components Required for Ricin Toxin A Chain (RTA) Trafficking in Yeast. J. Vis. Exp. (2017).This video demonstrates the purification of a polyhistidine-tagged recombinant protein using nickel-based affinity chromatography. It outlines key steps, including bacterial lysis by sonication, clarification and filtration of the lysate, and selective binding and elution of the target protein using imidazole.
FAQs
Selectivity comes from coordination between immobilized nickel and histidine side chains displayed by the engineered tag. During loading and washing, the tagged protein remains associated while contaminants are removed. Elution then changes this interaction rather than relying only on general protein separation, allowing recovery of a defined recombinant reagent for downstream immunology, infection, or structural studies.
Imidazole or an altered pH disrupts the interaction between the polyhistidine tag and immobilized nickel ions. This controllable change separates the target from the resin after unwanted material has been washed away. The elution condition therefore determines whether the purified protein is recovered efficiently while maintaining the stability required for later assays or investigations.
Buffer composition and chromatography conditions are central variables because they influence both target binding and protein stability. Researchers must therefore select conditions that preserve the recombinant protein while supporting removal of contaminants and controlled elution. These factors matter especially when the purified material will serve as a defined antigen, cytokine, antibody, or other immunological reagent.
A typical workflow loads the recombinant sample onto immobilized nickel resin, washes the resin to remove contaminants, and elutes the bound polyhistidine-tagged protein with imidazole or an altered pH. The sequence concentrates the target into an isolated fraction suitable for subsequent use. Buffer composition and operating conditions must be controlled throughout to support purity and stability.
The core materials are a recombinant protein carrying a polyhistidine tag and resin containing immobilized nickel ions. Nickel may be coordinated by nitrilotriacetic acid or related chelators, which anchor the metal within the purification matrix. The workflow also requires wash and elution conditions, including imidazole or pH adjustment, to control target retention and release.
Researchers can apply the method when they need defined microbial antigens, cytokines, antibodies, or other recombinant proteins. Purified products support immunological assays, structural studies, vaccine research, and investigations of host-pathogen interactions. Its value in these settings comes from producing a target preparation whose composition is controlled more directly than an unpurified recombinant sample.
The purified fraction can provide a defined protein reagent for assays that examine immune responses or infection-related processes. It can also supply material for structural studies and vaccine research, where the identity and preparation of the target matter. In host-pathogen investigations, purified microbial or immune-related proteins help connect experimental observations to a specific molecular component.
Purifying microbial antigens with a polyhistidine tag can generate defined material for examining interactions between pathogen-derived proteins and host immune components. The same strategy applies to cytokines, antibodies, and other proteins relevant to infection biology. By linking purification conditions to protein stability and purity, researchers can obtain reagents appropriate for comparative assays and mechanistic investigations.