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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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Published in: | Journal of structural and functional genomics 2014-12, Vol.15 (4), p.191-199 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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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. |
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ISSN: | 1345-711X 1570-0267 |
DOI: | 10.1007/s10969-014-9190-1 |