WW domain-binding protein 4 is a protein that in humans is encoded by the WBP4gene.[5][6]
This gene encodes WW domain-containing binding protein 4. The WW domain represents a small and compact globular structure that interacts with proline-rich ligands. This encoded protein is a general spliceosomal protein that may play a role in cross-intron bridging of U1 and U2 snRNPs in the spliceosomal complex A.[6]
Takahara T, Tasic B, Maniatis T, et al. (2005). "Delay in synthesis of the 3' splice site promotes trans-splicing of the preceding 5' splice site". Mol. Cell. 18 (2): 245–51. doi:10.1016/j.molcel.2005.03.018. PMID15837427.