The domain within your query sequence starts at position 636 and ends at position 752; the E-value for the RPT_3 domain shown below is 7.84e-10.

PGPRGVKGVDGIRGLKGHKGEKGEDGFPGFKGDIGVKGDRGEVGVPGSRGEDGPEGPKGR
TGPTGDPGPTGLMGEKGKLGVPGLPGYPGRQGPKGSLGFPGFPGASGEKGARGLSGK

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