The domain within your query sequence starts at position 593 and ends at position 895; the E-value for the RPT_1 domain shown below is 3.56e-18.

DLKTAAPETEQTENVKPKSRSRLQRPKPNLARAVGKKSAVSQDRQDERNKNSPSETAAEK
NHMEKETMNESETSVAKNTDGESPGAKTVSDLSEKSCVQQDSQAKVLRPTRLMRSRMQRP
KPNVVKAAERKEILTSQEKFGAHVEKSEDESCVVIPPQTENESHKNLQCEDTVSEPGRKD
PFENIQPDQPQVLSDCPSIHEGNKENKRKQVPVLRTRFQKPKPNTGRRRRRISSKEGIPE
ETPISGEIPATWEEIPSLDTSLREEVLSVPLAPLTATASTKDSESDVKDSGRNDTASNAE
MSE

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