The domain within your query sequence starts at position 558 and ends at position 775; the E-value for the RPT_1 domain shown below is 6.41e-7.

SPTASMSILNPNATPPTTSSNLLAPHATSSTTYSILLAPYATLSTASSNLLAPQATVSTA
SSNLLAPHATLSTTSSNLLAPHATLSTTSSNLLAPHATSSTASSNLLAPQATLSTPSNSL
LAPHATLSTTSSNLLAPHATSSTASSNLLAPHATSSTASSNLLAPHATLPTASSNLLAPQ
LCPVTASRALSAIPVPSATVHSSPSWTPRRGTVPKEPS

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