Is an ortholog of human RTEL1 (regulator of telomere elongation helicase 1). Is predicted to have ATP binding activity\; ATP-dependent DNA helicase activity\; and DNA polymerase binding activity. Is involved in regulation of double-strand break repair via homologous recombination. Human ortholog(s) of this gene are implicated in autosomal dominant dyskeratosis congenita 4 and autosomal recessive dyskeratosis congenita 5.