The domain within your query sequence starts at position 3078 and ends at position 3132; the E-value for the RPT_3 domain shown below is 5.83e-17.

GQCGPFSGQSSGHIQHGPCFGQTEGSFQSSNCGQQGTTSYQSSGFDQQRSGLHQS

This is a significant internal repeat in the query protein sequence, as detected by the Prospero program.