期刊
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
卷 55, 期 -, 页码 73-83出版社
WILEY
DOI: 10.1042/BA20090273
关键词
affinity tag; dual-affinity; protein complex; tag combination; tandem affinity purification (TAP)
TAP (tandem affinity purification) allows rapid and clean isolation of a tagged protein along with its interacting partners from cell lysates. Initially developed in yeast, the TAP method has subsequently been adapted to other cells and organisms. In combination with MS analysis, this method has become an indispensable tool for systematic identification of target-associated protein complexes. The key feature of TAP is the use of a dual-affinity tag, which is fused to the protein of interest. The original TAP tag consisted of two IgG-binding units of Protein A of Staphylococcus aureus and the calmodulin-binding peptide. As the technique has been widely exploited, a number of alternative TAP tags based on other affinity handles have been developed. The present review gives an overview of the various tag combinations for TAP with a highlight on those alternatives that result in improved yields or unique features. The information provided should assist in the selection and development of TAP tags for specific applications.
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