Splice factor required for alternative splicing of TRA2B/SFRS10 transcripts. Binds to ssRNA containing the consensus sequence 5'-AGGUAA-3' (PubMed:21256132). May interfere with constitutive 5'-splice site selection. {ECO:0000269|PubMed:11448987, ECO:0000269|PubMed:21256132}. This is the function of Ensembl gene identifier ENSG00000132485 (ZRANB2, zinc finger RANBP2-type containing 2).