PureCube Zn-NTA Agarose

Immobilized metal affinity chromatography, or IMAC, has been employed for many applications making use of its versatile interaction with aromatic nitrogens and phosphates. To this end, NTA matrices have been loaded with a broad range of transition metals, as optimized for the individual interaction.

Zn-NTA Agarose is the optimal matrix for the purification of zinc-finger proteins, either via his tag, or via direct interaction of the zinc-binding motif with the NTA ligand. 

 

Zn-NTA MagBeads and Agaroses have been successfully used to enhance sensitivity in Malaria detection. Read our application note to learn more.

 

PureCube Affinity Resins

PureCube Alternative IMAC Affinity Resins

 

 

PureCube Zn-NTA Agarose provides:

  Ready-to-use matrix

  Purification of zinc-finger proteins, with or without his tag

  Purification of his-tagged proteins with different specificity

  Zn-NTA MagBeads also available

 

Agarose Knowledge Page

Alternative IMAC Products

 
 

Purification of zinc-finger proteins

When purifying his-tagged zinc-finger proteins which require a bound zinc ion for activity, it is often advisable to use Zn-IMAC instead of Ni-IMAC materials. Zinc matrices provide a high specificity for his-tagged protein purification (see Fig. 1) and an exchange of zinc bound to the active site of the protein by nickel is avoided (2).

At the same time, non-tagged zinc-finger proteins can be purified using zinc IMAC matrices, simply by their affinity to this metal (1).

 

 

Fig. 3: Affinity and specificity of metal ions commonly used for IMAC. Loading an IDA or NTA resin with different metal ions can adjust the affinity and specificity of the resin to optimize the purity and yield of a purified protein.

Fig. 1: Affinity and specificity of metal ions commonly used for IMAC.
Loading an IMAC resin with different metal ions can adjust the affinity and specificity to optimize the purity and yield of a purified protein.
 

Different metal ions confer different binding affinity and specificity

Loading different metal ions to a resin results in differing affinity and specificity for a his-tagged protein. Generally, cobalt exhibits the higest binding specificity of commonly used IMAC metal ions, leading to relatively low yields but high purity. Copper, at the other end of the spectrum, has a high affinity leading to high yields but unspecific binding. In searching for the optimal resin to purify a protein, it is recommended to explore different chelating ligands (IDA or NTA) and different metal ions.

 

 

Literature references

1.
Vorácková, I. et al. Purification of proteins containing zinc finger domains using immobilized metal ion affinity chromatography. Protein Expr. Purif. (2011) 79(1):88-95.
2.
Block et. al. Immobilized-metal affinity chromatography (IMAC) a review. Methods Enzymol. (2009), 463:439-73.

 

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Zn-NTA Agarose

PureCube Agarose
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PureCube Zn-NTA Agarose (10 ml)

Sales price: 103,00 €

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PureCube Agarose
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PureCube Zn-NTA Agarose (50 ml)

Sales price: 409,00 €

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PureCube Agarose
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PureCube Zn-NTA Agarose (250 ml)

Sales price: 1775,00 €

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