The domain within your query sequence starts at position 601 and ends at position 737; the E-value for the RPT_1 domain shown below is 1.76e-26.

NRVREENQQTSYDKVGHHNASRIKPQKATLSTLQSKHPEVTHQASCKAEPKRYEEPHPER
IQMTSPLTYDQLKSKDRQDESVRRNFVKMEAYSSVLNTYTTTSPAPGFGSGQCCNSLEHS
RSFTPPISRPWRFVESV

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