PPIE
Domain
The RRM domain mediates both interaction with RNA and with KMT2A (via the third PHD-type zinc-finger), but has much higher affinity for the KMT2A PHD-type zinc-finger.
Function
Involved in pre-mRNA splicing as component of the spliceosome (PubMed:11991638, PubMed:28076346). Combines RNA-binding and PPIase activities (PubMed:18258190, PubMed:20460131, PubMed:20677832, PubMed:8977107). Binds mRNA and has a preference for single-stranded RNA molecules with poly-A and poly-U stretches, suggesting it binds to the poly(A)-region in the 3'-UTR of mRNA molecules (PubMed:18258190, PubMed:20460131, PubMed:8977107). Catalyzes the cis-trans isomerization of proline imidic peptide bonds in proteins (PubMed:18258190, PubMed:20541251, PubMed:20677832, PubMed:8977107). Inhibits KMT2A activity; this requires proline isomerase activity (PubMed:20460131, PubMed:20541251, PubMed:20677832).
Sequence Similarities
Belongs to the cyclophilin-type PPIase family. PPIase E subfamily.
Tissue Specificity
Found in all the examined tissues including heart, brain, placenta, lung, liver, skeletal muscle, kidney and pancreas.
Cellular localization
- Nucleus
Alternative names
CYP33, PPIE, Peptidyl-prolyl cis-trans isomerase E, PPIase E, Cyclophilin E, Cyclophilin-33, Rotamase E