The domain family Neuritin1 (NRN1) is a GPI-anchored protein expressed in post-mitotic-differentiating neurons in the developing nervous system [1]. NRN1 is a glutamate and neurotrophin receptor target encoding a neuronal protein that functions extracellularly to modulate neurite outgrowth (OMIM:607409). This family of proteins is found in eukaryotes. Proteins in this family are typically between and 158 amino acids in length.

1: Neuritin: a gene induced by neural activity and neurotrophins that promotes neuritogenesis. Naeve GS, Ramakrishnan M, Kramer R, Hevroni D, Citri Y, Theill LE; Proc Natl Acad Sci U S A. 1997;94:2648-2653. PMID:9122250