Abstract
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.
MeSH Terms
Animals
Biomarkers/metabolism
Cell Adhesion
Embryo, Nonmammalian/cytology,metabolism
Gene Expression Regulation, Developmental
Membrane Proteins/genetics,metabolism
Morphogenesis
Netrin Receptors
Protein Binding
Receptors, Cell Surface/genetics,metabolism
Xenopus/embryology,metabolism
Xenopus Proteins/genetics,metabolism
rho GTP-Binding Proteins/metabolism
Chemicals
Biomarkers
FLRT3 protein, Xenopus
Membrane Proteins
Netrin Receptors
Receptors, Cell Surface
Rnd1 protein, Xenopus
Xenopus Proteins
rho GTP-Binding Proteins
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Karaulanov Emil
Division of Molecular Embryology, DKFZ-ZMBH Alliance, German Cancer Research Center, Heidelberg, Germany.
Böttcher Ralph T
Stannek Peter
Wu Wei
Rau Marlene
Ogata Souichi
Cho Ken W Y
Niehrs Christof
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