Unc5B interacts with FLRT3 and Rnd1 to modulate cell adhesion in Xenopus embryos.
The FLRT family of transmembrane proteins has been implicated in the regulation of FGF signalling, neurite outgrowth, homotypic cell sorting and cadherin-mediated adhesion. In an expression screen we identified the Netrin receptors Unc5B and Unc5D as high-affinity FLRT3 interactors. Upon overexpression, Unc5B phenocopies FLRT3 and both proteins synergize in inducing cell deadhesion in Xenopus embryos. Morpholino knock-downs of Unc5B and FLRT3 synergistically affect Xenopus development and induce morphogenetic defects. The small GTPase Rnd1, which transmits FLRT3 deadhesion activity, physically and functionally interacts with Unc5B, and mediates its effect on cell adhesion. The results suggest that FLRT3, Unc5B and Rnd1 proteins interact to modulate cell adhesion in early Xenopus development.
Karaulanov
Emil
E
Division of Molecular Embryology, DKFZ-ZMBH Alliance, German Cancer Research Center, Heidelberg, Germany.
Böttcher
Ralph T
RT
Stannek
Peter
P
Wu
Wei
W
Rau
Marlene
M
Ogata
Souichi
S
Cho
Ken W Y
KW
Niehrs
Christof
C
D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D002448:Cell Adhesion; D004625:Embryo, Nonmammalian / Q000166:cytology* / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D009024:Morphogenesis; D000075386:Netrin Receptors; D011485:Protein Binding; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism*; D014981:Xenopus / Q000196:embryology* / Q000378:metabolism*; D029867:Xenopus Proteins / Q000235:genetics / Q000378:metabolism*; D020741:rho GTP-Binding Proteins / Q000378:metabolism*
D015415:Biomarkers; C542073:FLRT3 protein, Xenopus; D008565:Membrane Proteins; D000075386:Netrin Receptors; D011956:Receptors, Cell Surface; C491770:Rnd1 protein, Xenopus; D029867:Xenopus Proteins; D020741:rho GTP-Binding Proteins