The domain within your query sequence starts at position 418 and ends at position 768; the E-value for the RPT_5 domain shown below is 5.53e-5.

GSDMSFDCGSSCQSLSALSELTAREINVSEETHAYSQPRNETPTVSGATSDNGSSSRQVI
TQNIQLISLVDESYESSGSEVNFDGDDSLPSTSHRPPQPVEVVVPLRLVDKSYGSGSSEP
CEDSGSSADETPAASRQQNPVRNTHANLVDENYGSSSFSSDSDAALDHPQVPVQEGSPRG
RAVGQGNEEQPSSAEAHPERDGSLETVAHELQRESQEINLPNQKNTSLGDMNCESHGPEV
GFHADAQLEADQSPVNPEEVDLDLENQSVHSGISNLSFDSNASYQSANDQPQGAWGEVNL
DELNVDMEVKSNGCSSSELTFDSDSPLLSVTERSLLDFEGLNEDDFNLEDE

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