The domain within your query sequence starts at position 670 and ends at position 786; the E-value for the RPT_3 domain shown below is 5.16e-10.

PGPRGVKGVDGIRGLKGHKGEKGEDGFPGFKGDIGVKGDRGEVGVPGSRGEDGPEGPKGR
TGPTGDPGPTGLMGEKGKLGVPGLPGYPGRQGPKGSLGFPGFPGASGEKGARGLSGK

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