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Citations Search

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Protein Expr. Purif. 89, 62–72. Application of HaloTag technology to expression and purification of cannabinoid receptor CB2. 2013

Locatelli-Hoops, S., Sheen, Fangmin C., Zoubak, L., Gawrisch, K. and Yeliseev, A.A.

Notes: The HaloTag® Protein Tag was used to tag, immobilize and purify functional cannabinoid receptor CB2, a GPCR,  after induction of expression in E. coli.  (4263)

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Protein Expr. Purif. 68(1), 110-120. HaloTag7: A genetically engineered tag that enhances bacterial expression of soluble proteins and improves protein purification 2009

Ohana, R.F., Encel, L.P., Zhao, K., Simpson, D., Slater, M.R., Urh, M., Wood, K.V.

Notes: The authors note that while many protein fusion tags are available to assist in purifying functional, recombinant proteins in soluble form and adequate amounts, none of the available tags are ideal when applied to the diversity of proteins studied. Available tags are often best-suited to specific aspects of the overall process, be it expression, solubilization, protein capture, etc. HaloTag was designed to address multiple features. The authors demonstrated that HaloTag provided enhanced expression and solubility in E. coli, with efficient protein purification and labeling for screening and quantitation. Enhanced solubility coupled with covalent capture gives HaloTag advantages over conventional affinity fusion tags, demonstrated by the successful purification of a wide variety of proteins, including low expressers, with higher yield and purity compared to the other tested tags. Covalent capture coupled with efficient tag removal to release the target protein, provides higher purity by eliminating tag contaminants. Using full-length cDNAs encoding 23 human proteins of varying size and function, the authors compared the efficacy of HaloTag as an expression and purification tag to the frequently used solubility enhancers MBP and GST. As reported previously, the three larger tags (HaloTag, MBP and GST) provided higher total and soluble expression compared to the smaller His6tag. In comparing soluble protein expression levels for the three larger tags, it was found that HaloTag solubilized 74% of the 23 human proteins examined, compared to 52% for MBP and 39% for GST. G2681 was one of the T7, bacterial promoter-based Flexi vectors used.
(4005)

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