The domain within your query sequence starts at position 589 and ends at position 674; the E-value for the RPT_2 domain shown below is 4.46e-20.

GEKGARGKPGLPGMPGSDGLPGHPGKEGPPGTKGNQGPSGPQGPLGYPGPRGVKGVDGIR
GLKGHKGEKGEDGFPGFKGDIGVKGD

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