The domain within your query sequence starts at position 754 and ends at position 925; the E-value for the RPT_3 domain shown below is 9.16e-5.

GSPNSSESFEHIARSARDHGISLSEPRMMWGSDPYHAEPQQAATPKSAEETGDARPETAM
DHEHMTAAYPVEHSQLETHSKTDVARDSTETEEQKFLSRSLEDVKPRHVDTNTQSACFDV
IDQKSLPTSAEERISALESQPARKRSVSHGSNHAQNAEEQRNEPSVSIPKVI

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