The domain within your query sequence starts at position 445 and ends at position 620; the E-value for the PCIF1_WW domain shown below is 7.1e-74.

KLWLLYRYSCVDDSAFERFLPRVWCLLRRYQMMFGVGLYEGTGLQGSLPVHVFETLHRLF
GVSFECFASPLNCYFRQYCSAFPDTDGYFGSRGPCLDFTPLSGSFEANPPFCEELMDAMV
SHFEKLLESSAEPLSFIVFIPEWREPPTPALTRMEQSRFKRHQLVLPAFEHEYRSG

PCIF1_WW

PCIF1_WW
PFAM accession number:PF12237
Interpro abstract (IPR022035):

This domain is found in bacteria and eukaryotes, and is approximately 180 amino acids in length. It is the WW domain of PCIF1. PCIF1 interacts with phosphorylated RNA polymerase II carboxy-terminal domain (CTD). The WW domain of PCIF1 can directly and preferentially bind to the phosphorylated CTD compared to the unphosphorylated CTD. PCIF1 binds to the hyperphosphorylated RNAP II (RNAP IIO) in vitro and in vivo. Double immunofluorescence labeling in HeLa cells demonstrated that PCIF1 and endogenous RNAP IIO are co-localized in the cell nucleus. Thus, PCIF1 may play a role in mRNA synthesis by modulating RNAP IIO activity.

This is a PFAM domain. For full annotation and more information, please see the PFAM entry PCIF1_WW