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2014 ; 101
(ä): 192-202
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Molecular basis of the binding of YAP transcriptional regulator to the ErbB4
receptor tyrosine kinase
#MMPMID24472438
Schuchardt BJ
; Bhat V
; Mikles DC
; McDonald CB
; Sudol M
; Farooq A
Biochimie
2014[Jun]; 101
(ä): 192-202
PMID24472438
show ga
The newly discovered transactivation function of ErbB4 receptor tyrosine kinase
is believed to be mediated by virtue of the ability of its
proteolytically-cleaved intracellular domain (ICD) to physically associate with
YAP2 transcriptional regulator. In an effort to unearth the molecular basis of
YAP2-ErbB4 interaction, we have conducted a detailed biophysical analysis of the
binding of WW domains of YAP2 to PPXY motifs located within the ICD of ErbB4. Our
data show that the WW1 domain of YAP2 binds to PPXY motifs within the ICD in a
differential manner and that this behavior is by and large replicated by the WW2
domain. Remarkably, while both WW domains absolutely require the integrity of the
PPXY consensus sequence, non-consensus residues within and flanking this motif do
not appear to be critical for binding. In spite of this shared mode of binding,
the WW domains of YAP2 display distinct conformational dynamics in complex with
PPXY motifs derived from ErbB4. Collectively, our study lends new insights into
the molecular basis of a key protein-protein interaction involved in a diverse
array of cellular processes.
|*Molecular Dynamics Simulation
[MESH]
|Adaptor Proteins, Signal Transducing/*chemistry
[MESH]