Ligand-regulated association of ErbB-4 to the transcriptional co-activator YAP65 controls transcription at the nuclear level.
It has been proposed that ligand-dependent Regulated Intramembrane Proteolysis (RIP) of ErbB-4 receptors generates 80 kDa Intra-Cellular Domains (E4.ICDs) that relocate to the nuclear compartments where they implement the signaling abilities of the ErbB-4 receptors. The E4.ICD may directly regulate gene transcription or, in an alternative scenario, the tyrosine kinase activity of E4.ICDs may target proteins involved in transcriptional regulation upon its relocation into the nucleus. We have identified the transcriptional coactivator YAP65, here referred as YAP (Yes Associated Protein), as binding partner of ErbB-4 in a two hybrid screening in yeast. Interaction between YAP and ErbB-4 occurs via the WW domain of YAP and the PPPPY at positions 1297-1301 and the PPPAY at positions 1052-1056 of the amino acid sequence of the Cyt-1 isoform of ErbB-4. Stechiometry of binding is regulated by the ligand-dependent phosphorylation of Tyr 1056 in the PPPAYTPM module that function as "biochemical switch" to decrease the association of YAP to ErbB-4. In principle, this novel interaction highlights new mechanisms of signaling propagation from the ErbB-4 receptors, offering supporting evidences that the E4.ICDs forms released following ligand-receptor engagement may recruit YAP and relocate to the nucleus to implement or regulate transcription.
Omerovic
Jasminka
J
Department of Experimental Medicine and Pathology, University La Sapienza, Rome, Italy.
Puggioni
Eleonora M R
EM
Napoletano
Silvia
S
Visco
Vincenzo
V
Fraioli
Rocco
R
Frati
Luigi
L
Gulino
Alberto
A
Alimandi
Maurizio
M
D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence / Q000235:genetics; D053829:Amyloid Precursor Protein Secretases; D000818:Animals; D016282:Aspartic Acid Endopeptidases; D001665:Binding Sites / Q000235:genetics; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002451:Cell Compartmentation / Q000235:genetics; D018797:Cell Cycle Proteins; D002467:Cell Nucleus / Q000235:genetics / Q000378:metabolism*; D010450:Endopeptidases / Q000378:metabolism; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism*; D005809:Genes, Regulator / Q000235:genetics*; D006367:HeLa Cells; D006801:Humans; D008024:Ligands; D051379:Mice; D041681:NIH 3T3 Cells; D010750:Phosphoproteins / Q000235:genetics / Q000378:metabolism*; D010766:Phosphorylation; D011485:Protein Binding / Q000235:genetics; D017434:Protein Structure, Tertiary / Q000235:genetics; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics / Q000378:metabolism; D066247:Receptor, ErbB-4; D014157:Transcription Factors; D015533:Transcriptional Activation / Q000235:genetics; D014443:Tyrosine / Q000378:metabolism; D000091102:YAP-Signaling Proteins
D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D008024:Ligands; D010750:Phosphoproteins; D014157:Transcription Factors; D000091102:YAP-Signaling Proteins; C088374:YAP1 protein, human; C486223:Yap1 protein, mouse; D014443:Tyrosine; C587689:ERBB4 protein, human; D066246:ErbB Receptors; C587690:Erbb4 protein, mouse; D020794:Receptor Protein-Tyrosine Kinases; D066247:Receptor, ErbB-4; D053829:Amyloid Precursor Protein Secretases; D010450:Endopeptidases; D016282:Aspartic Acid Endopeptidases; C509280:BACE1 protein, human; C509282:Bace1 protein, mouse