Regulates independently canonical Wnt and Notch signaling by modulating LEF1 and Notch protein turnover. Stabilizes LEF1, a pivotal transcription factor in the Wnt signaling cascade, by blocking its ubiquitination. Involved in angiogenesis; involved in intersegmental vessel patterning during development. First detected at low levels in the blastula stage and begins to accumulate in the margin of the blastoderm. At the shield stage, when gastrulation starts, expression is higher on the dorsal site. As gastrulation proceeds, expressed at high levels in the anterior ectoderm. In the 1 day old embryo, at the early pharyngula stage, expression in the developing brain is very strong and expression extends in to the spinal cord. Belongs to the NRARP family.