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Publications - Stress and Develop Biology

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Weyhe, M.; Eschen-Lippold, L.; Pecher, P.; Scheel, D.; Lee, J. Ménage à trois: The complex relationships between mitogen-activated protein kinases, WRKY transcription factors and VQ-motif-containing proteins. Plant Signal Behav 9, e29519, (2014) DOI: 10.4161/psb.29519

Out of the 34 members of the VQ-motif-containing protein (VQP) family, ten are phosphorylated by the mitogen-activated protein kinases (MAPKs), MPK3 and MPK6. Most of these MPK3/6-targeted VQPs (MVQs) interacted with specific sub-groups of WRKY transcription factors in a VQ-motif-dependent manner. In some cases, the MAPK appears to phosphorylate either the MVQ or the WRKY, while in other cases, both proteins have been reported to act as MAPK substrates. We propose a network of dynamic interactions between members from the MAPK, MVQ and WRKY families - either as binary or as tripartite interactions. The compositions of the WRKY-MVQ transcriptional protein complexes may change - for instance, through MPK3/6-mediated modulation of protein stability - and therefore control defence gene transcription.
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