The domain within your query sequence starts at position 1171 and ends at position 1185; the E-value for the APC_15aa domain shown below is 1.9e-9.

HVDQPIDYSLKYATD

APC_15aa

APC_15aa
PFAM accession number:PF05972
Interpro abstract (IPR009240):

The 15 aa repeat is found in the APC protein family. It is involved in binding beta-catenin [(PUBMED:9823329)] along with the IPR009223 repeats. Many human cancer mutations map to the region around these motifs, and may be involved in disrupting their binding of beta-catenin.

GO process:Wnt signaling pathway (GO:0016055)
GO function:beta-catenin binding (GO:0008013)

This is a PFAM domain. For full annotation and more information, please see the PFAM entry APC_15aa