title: Pinpointing phosphotyrosine-dependent interactions downstream of the collagen receptor DDR1.
abstract: Activation of the receptor tyrosine kinase DDR1 by collagen results in robust and sustained phosphorylation, however little is known about its downstream mediators. Using phosphopeptide mapping and site-directed mutagenesis, we here identified multiple tyrosine phosphorylation sites within DDR1. We found that Nck2 and Shp-2, two SH2 domain-containing proteins, bind to DDR1 in a collagen-dependent manner. The binding site of Shp-2 was mapped to tyrosine-740 of DDR1 within an ITIM-consensus sequence. Lastly, ablation of DDR1 in the mouse mammary gland resulted in delocalized expression of Nck2, suggesting that defects observed during alveologenesis are caused by the lack of the DDR1-Nck2 interaction.
authors.affiliation: Department of Laboratory Medicine and Pathobiology, University of Toronto, Medical Sciences Building, Room 7334, 1 King's College Circle, Toronto, Ont., Canada M5S 1A8.
authors.forename: Diana H H
authors.initials: DH
authors.lastname: Koo
authors.forename: Catherine
authors.initials: C
authors.lastname: McFadden
authors.forename: Yun
authors.initials: Y
authors.lastname: Huang
authors.forename: Rahim
authors.initials: R
authors.lastname: Abdulhussein
authors.forename: Manja
authors.initials: M
authors.lastname: Friese-Hamim
authors.forename: Wolfgang F
authors.initials: WF
authors.lastname: Vogel
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000378:metabolism; D020816:Amino Acid Motifs / Q000235:genetics; D000818:Animals; D045744:Cell Line, Tumor; D000070819:Discoidin Domain Receptor 1; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism; D042361:Mammary Glands, Human / Q000378:metabolism; D051379:Mice; D018345:Mice, Knockout; D016297:Mutagenesis, Site-Directed; D015513:Oncogene Proteins / Q000378:metabolism; D019000:Phosphotyrosine / Q000235:genetics / Q000378:metabolism; D011485:Protein Binding / Q000502:physiology; D021381:Protein Transport / Q000502:physiology; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D017027:Protein Tyrosine Phosphatases / Q000378:metabolism; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics / Q000378:metabolism*; D054593:SH2 Domain-Containing Protein Tyrosine Phosphatases; D018909:src Homology Domains / Q000502:physiology
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D047908:Intracellular Signaling Peptides and Proteins; C485544:NCK2 protein, human; D015513:Oncogene Proteins; D019000:Phosphotyrosine; C092030:DDR1 protein, human; D000070819:Discoidin Domain Receptor 1; D020794:Receptor Protein-Tyrosine Kinases; C516724:PTPN11 protein, human; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D017027:Protein Tyrosine Phosphatases; C516725:Ptpn11 protein, mouse; D054593:SH2 Domain-Containing Protein Tyrosine Phosphatases