The domain within your query sequence starts at position 552 and ends at position 606; the E-value for the RPT_1 domain shown below is 2.78e-6.

KKRKGKTVTTPWTEDPRLFADQGDAPAEKKPKGKRVTKSRKDQAQFLADEEAMPA

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