Predicted to enable several functions, including GTP cyclohydrolase binding activity; GTP-dependent protein binding activity; and amino acid binding activity. Predicted to be involved in negative regulation of GTP cyclohydrolase I activity and protein-containing complex assembly. Predicted to be located in dendrite; melanosome; and nucleus. Predicted to be part of protein-containing complex. Predicted to be active in cytoplasm and nucleus. Is expressed in medulla oblongata basal plate marginal layer; midbrain mantle layer; and pons marginal layer. Orthologous to human GCHFR (GTP cyclohydrolase I feedback regulator). [provided by Alliance of Genome Resources, Apr 2022]