The domain within your query sequence starts at position 761 and ends at position 886; the E-value for the RPT_1 domain shown below is 7.07e-15.

KPVPISVASYSHGSSQDHPRKQAFDADPCRFSPPHLTDAQKSSRVQHRRCSEPSIDDQNY
KLSYLRGIYSMKQNKASCEAGLLHGEDDYLRRHKSLQIEGQKLINQSLVMGIEVGKSSSS
HQSTEK

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