The domain within your query sequence starts at position 458 and ends at position 555; the E-value for the RPT_1 domain shown below is 1.8e-29.

LVDPSCKDKAKSKVTLGSSHKYKAKSKVTLVDSSCKDQAESKVTLVDSSCKDQAESKVTL
VDPSCKDNAKSKVTLGSSRKYKAKSKVPLVDSSGKDKA

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