Endonuclease V

UniProtKB accession:  Q8N8Q3

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UniProtKB description:  Endoribonuclease that specifically cleaves inosine-containing RNAs: cleaves RNA at the second phosphodiester bond 3' to inosine (PubMed:23912683, PubMed:23912718, PubMed:27573237, PubMed:31703097, PubMed:25195743). Active against both single-stranded and double-stranded RNAs (PubMed:31703097, PubMed:25195743). Has strong preference for single-stranded RNAs (ssRNAs) toward double-stranded RNAs (dsRNAs) (PubMed:23912718). Cleaves mRNAs and tRNAs containing inosine (PubMed:23912683, PubMed:31703097). Also able to cleave structure-specific dsRNA substrates containing the specific sites 5'-IIUI-3' and 5'-UIUU-3' (PubMed:23912718, PubMed:27573237). Inosine is present in a number of RNAs following editing; the function of inosine-specific endoribonuclease is still unclear: it could either play a regulatory role in edited RNAs, or be involved in antiviral response by removing the hyperedited long viral dsRNA genome that has undergone A-to-I editing (Probable). Binds branched DNA structures (PubMed:23139746).