Secreted RNA-binding protein required to concentrate, stabilize and enhance environmental RNA bioavailability in the honeybee royal jelly (PubMed:31051140). Acts as a RNA-aggregating protein: binds 18 nucleotides and longer single- and double-stranded RNA (ssRNA and dsRNA, respectively) in a non-specific manner (PubMed:31051140). RNA-binding drives super-order assembly of oligomers into extracellular ribonucleoprotein granules that concentrate, protect and enhance RNA uptake granules, facilitating RNA transfer among bees (PubMed:31051140). Homoligomer; in the absence of RNA, assembles into a higher-order oligomeric form, composed of around 20 monomer units. Hypopharyngeal glands of nurse honey bees. Produced by the cephalic glandular system of the nurse honey bee. Belongs to the major royal jelly protein family.