Binding between 5S rRNA and TFIIIA serves to both repress further transcription of the 5S RNA gene and stabilize the 5S RNA transcript until it is required for ribosome assembly.
Seondumine 5S rRNA ja TFIIIA vahele aitab nii represseerida edasist 5S RNA geeni transkriptsioon kui ka stabiliseerida 5S RNA transkripti nii kaua kui seda on vaja ribosoomi moodustumisel.