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Development of a hexahistidine-3× FLAG-tandem affinity purification method for endogenous protein complexes in Pichia pastoris

We developed a method for efficient chromosome tagging in Pichia pastoris , using a useful tandem affinity purification (TAP) tag. The TAP tag, designated and used here as the THF tag, contains a thrombin protease cleavage site for removal of the TAP tag and a hexahistidine sequence (6× His) followe...

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Bibliographic Details
Published in:Journal of structural and functional genomics 2014-12, Vol.15 (4), p.191-199
Main Authors: Higo, Toshiaki, Suka, Noriyuki, Ehara, Haruhiko, Wakamori, Masatoshi, Sato, Shin, Maeda, Hideaki, Sekine, Shun-ichi, Umehara, Takashi, Yokoyama, Shigeyuki
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Language:English
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Summary:We developed a method for efficient chromosome tagging in Pichia pastoris , using a useful tandem affinity purification (TAP) tag. The TAP tag, designated and used here as the THF tag, contains a thrombin protease cleavage site for removal of the TAP tag and a hexahistidine sequence (6× His) followed by three copies of the FLAG sequence (3× FLAG) for affinity purification. Using this method, THF-tagged RNA polymerases I, II, and III were successfully purified from P. pastoris . The method also enabled us to purify the tagged RNA polymerase II on a large scale, for its crystallization and preliminary X-ray crystallographic analysis. The method described here will be widely useful for the rapid and large-scale preparation of crystallization grade eukaryotic multi-subunit protein complexes.
ISSN:1345-711X
1570-0267
DOI:10.1007/s10969-014-9190-1