Alternative products:Additional isoforms seem to exist ,Function:Necessary for the ATP-dependent first step of spliceosome assembly. Binds to the intron branch point sequence (BPS) 5'-UACUAAC-3' of the pre-mRNA. May act as transcription repressor. ,PTM:Phosphorylation on Ser-20 interferes with U2AF2 binding and spliceosome assembly. Isoform 6 is phosphorylated on Ser-463. ,similarity:Belongs to the BBP/SF1 family. ,similarity:Contains 1 CCHC-type zinc finger. ,similarity:Contains 1 KH domain. ,subunit:Binds U2AF2. Interacts with U1 snRNA. Binds EWSR1 , FUS and TAF15. ,tissue specificity:Detected in lung , ovary , adrenal gland , colon , kidney , muscle , pancreas , thyroid , placenta , brain , liver and heart. ,
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