Roundabout (gene) - Protein Structure

Protein Structure

Each member of the Robo family has a similar structure, consisting of five immunoglobulin-like domains, three fibronectin type III (FN3) repeats, a transmembrane domain, and a cytoplasmic domain with up to four conserved motifs (CC0-3). In all identified Robo receptors except for vertebrate Robo4, the Ig1 and Ig2 domains have been evolutionarily conserved and are crucial for binding to Slit ligands. Robo4 is unusual as it only contains two Ig and FN3 domains. However, recent research proposes that the vertebrate Slit2 protein can in fact bind to Robo4.

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