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A novel tandem affinity purification strategy for the efficient isolation and characterisation of native protein complexes.

Proteomics 7, 4228-4234 (2007)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Isolation and dissection of native multiprotein complexes is a central theme in functional genomics. The development of the tandem affinity purification (TAP) tag has enabled an efficient and large-scale purification of native protein complexes. However, the TAP tag features a size of 21 kDa and requires time consuming cleavage. By combining a tandem Strep-tag II with a FLAG-tag we were able to reduce the size of the TAP (SF-TAP) tag to 4.6 kDa. Both moieties have a medium affinity and avidity to their immobilised binding partners. This allows the elution of SF-tagged proteins under native conditions using desthiobiotin in the first step and the FLAG octapeptide in the second step. The SF-TAP protocol represents an efficient, fast and straightforward purification of protein complexes from mammalian cells within 2.5 h. The power of this novel method is demonstrated by the purification of Raf associated protein complexes from HEK293 cells and subsequent analysis of their protein interaction network by dissection of interaction patterns from the Raf binding partners MEK1 and 14-3-3.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Mass spectrometry; MEK1; Protein complexes; Raf; TAP
Language english
Publication Year 2007
HGF-reported in Year 0
ISSN (print) / ISBN 1615-9853
e-ISSN 1615-9861
Journal Proteomics
Quellenangaben Volume: 7, Issue: 23, Pages: 4228-4234 Article Number: , Supplement: ,
Publisher Wiley
Reviewing status Peer reviewed
Research field(s) Genetics and Epidemiology
PSP Element(s) FE 70722
PubMed ID 17979178
Scopus ID 37048999786
Erfassungsdatum 2007-12-31