The ATP-binding cassette domain 1 of RNase L inhibitor.
The ABC ATPase, RNase L inhibitor (RLI), is a key enzyme in ribosomal biogenesis, formation of translation preinitiation complexes, and assembly of HIV capsids. RLI s are not transport proteins and thus cluster with a group of soluble proteins that lack the transmembrane components commonly found in other members of the family. Structurally, RLIs have an N-terminal Fe-S domain and two nucleotide binding domains which are arranged to form two composite active sites in their interface cleft. RLI is one of the most conserved enzymes between archaea and eukaryotes with a sequence identity more than 48%. The high degree of evolutionary conservation suggests that RLI performs a central role in archaeal and eukaryotic physiology.
Jiyao W et al.(2023). "The conserved domain database in 2023.",