Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.

Characterization of MADS-domain transcription factor complexes in Arabidopsis flower development.

Smaczniak C., Immink R.G., Muino J.M., Blanvillain R., Busscher M., Busscher-Lange J., Dinh Q.D., Liu S., Westphal A.H., Boeren S., Parcy F., Xu L., Carles C.C., Angenent G.C., Kaufmann K.

Floral organs are specified by the combinatorial action of MADS-domain transcription factors, yet the mechanisms by which MADS-domain proteins activate or repress the expression of their target genes and the nature of their cofactors are still largely unknown. Here, we show using affinity purification and mass spectrometry that five major floral homeotic MADS-domain proteins (AP1, AP3, PI, AG, and SEP3) interact in floral tissues as proposed in the "floral quartet" model. In vitro studies confirmed a flexible composition of MADS-domain protein complexes depending on relative protein concentrations and DNA sequence. In situ bimolecular fluorescent complementation assays demonstrate that MADS-domain proteins interact during meristematic stages of flower development. By applying a targeted proteomics approach we were able to establish a MADS-domain protein interactome that strongly supports a mechanistic link between MADS-domain proteins and chromatin remodeling factors. Furthermore, members of other transcription factor families were identified as interaction partners of floral MADS-domain proteins suggesting various specific combinatorial modes of action.

Proc. Natl. Acad. Sci. U.S.A. 109:1560-1565(2012) [PubMed] [Europe PMC]

UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again