The domain within your query sequence starts at position 743 and ends at position 798; the E-value for the RPT_3 domain shown below is 2.21e-5.

QQYQDLRMEYETLRDLLKSRGSSLVTNEDNQRSSEDNQRSSEDNQRGSLAFEQQPA

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