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Gewählte Publikation:

Publikationstyp: Zeitschriftenaufsatz
Dokumenttyp: Originalarbeit

Jahr: 2013

AutorInnen: Giambruno, R; Grebien, F; Stukalov, A; Knoll, C; Planyavsky, M; Rudashevskaya, EL; Colinge, J; Superti-Furga, G; Bennett, KL

Titel: Affinity purification strategies for proteomic analysis of transcription factor complexes.

Quelle: J Proteome Res. 2013; 12(9):4018-4027

Autor/innen der Vetmeduni Vienna:

Grebien Florian

Diese Publikation wurde nicht im Namen der Vetmeduni Vienna erstellt und ist deshalb ausschließlich der persönlichen Publikationsliste des/der Autors/Autorin zugeordnet!

Affinity purification (AP) coupled to mass spectrometry (MS) has been successful in elucidating protein molecular networks of mammalian cells. These approaches have dramatically increased the knowledge of the interconnectivity present among proteins and highlighted biological functions within different protein complexes. Despite significant technical improvements reached in the past years, it is still challenging to identify the interaction networks and the subsequent associated functions of nuclear proteins such as transcription factors (TFs). A straightforward and robust methodology is therefore required to obtain unbiased and reproducible interaction data. Here we present a new approach for TF AP-MS, exemplified with the CCAAT/enhancer binding protein alpha (C/EBPalpha). Utilizing the advantages of a double tag and three different MS strategies, we conducted a total of six independent AP-MS strategies to analyze the protein-protein interactions of C/EBPalpha. The resultant data were combined to produce a cohesive C/EBPalpha interactome. Our study describes a new methodology that robustly identifies specific molecular complexes associated with transcription factors. Moreover, it emphasizes the existence of TFs as protein complexes essential for cellular biological functions and not as single, static entities.

Keywords Pubmed: Animals
CCAAT-Enhancer-Binding Protein-alpha/biosynthesis
CCAAT-Enhancer-Binding Protein-alpha/chemistry
CCAAT-Enhancer-Binding Protein-alpha/isolation & purification*
Cell Line
Chromatography, Affinity
Chromatography, Reverse-Phase
Hemagglutinin Glycoproteins, Influenza Virus/biosynthesis
Hemagglutinin Glycoproteins, Influenza Virus/chemistry
Hemagglutinin Glycoproteins, Influenza Virus/isolation & purification
Protein Binding
Protein Interaction Mapping/methods*
Protein Interaction Maps
Streptavidin/isolation & purification

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