Abstract
Immobilized metal affinity chromatography (IMAC), introduced in 1975 (1), relies on the formation of coordinate bonds between metal ions immobilized on a suitable support and electron donor groups in proteins. A polyhistidine tag (five or six His residues) placed at either the C- or N-terminus of a recombinant protein can form a stable chelate with immobilized transition metals. This allows fractionation of the target protein to 90–95% purity levels in a single chromatographic step (2–4). Metals like Cu2+ and Ni2+ bind surface-accessible His residues selectively. The high affinity of polyhistidine tags for commercially available metal resins (K d 10−13 M or more) allows the use of stringent conditions to remove loosely bound proteins, while retaining the recombinant protein bound to the immobilized metal.
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© 1995 Humana Press Inc.
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Tyutyulkova, S., Paul, S. (1995). Purification of Antibody Light Chains by Metal Affinity and Protein L Chromatography. In: Paul, S. (eds) Antibody Engineering Protocols. Methods In Molecular Medicine™, vol 51. Humana Press. https://doi.org/10.1385/0-89603-275-2:395
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DOI: https://doi.org/10.1385/0-89603-275-2:395
Publisher Name: Humana Press
Print ISBN: 978-0-89603-275-0
Online ISBN: 978-1-59259-538-9
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