ROBO2 Summary

Roundabout homolog 2 (ROBO2) is a cell-surface receptor for SLIT guidance ligands, particularly SLIT2, that functions in axonal navigation and neuronal migration during development (UniProt: Q9HCK4). The protein plays a role in neural tube midline crossing and directional axonal projection during neurogenesis. In UniProt records, ROBO2 is associated with vesicoureteral reflux 2 (VUR2), a congenital urological condition affecting the ureterovesical junction.

ROBO2 demonstrates relevance to Alzheimer's disease, showing consistent down-regulation in post-mortem AD brain tissue compared to age-matched controls. Across a single subcellular fraction from TMT-labeled proteomics analysis (human AD vs. controls, 4 fractions: P2, P3, S2, S3), ROBO2 exhibited a mean log2 fold-change of −0.49 (Chaparral AD proteomics), indicating reduced protein abundance in disease tissue. The functional role of ROBO2 in axonal guidance and neuronal development suggests potential relevance to AD-associated neurodegeneration and synaptic dysfunction, though mechanistic connections require further investigation.