The domain within your query sequence starts at position 219 and ends at position 594; the E-value for the RPT_1 domain shown below is 1.11e-41.

IQNFVTHQEESISFVLPGTKVLLLKNIQSIFQSSSVDLEKKDMLLKSIKSRFQSSSVDPE
KKERLLKIIQSRIESSSVDQETKALLLESIQSSIENSTVDLETKVWLLESIKSSIQNSSV
DPETKELLLERIKSSIENSTVDLGTKEWLLESIQSSIQSSSVDLGTKKMLLKIIQSSIQS
FSVYIGTKEWLLERVQSSIQSSSVDLGTKELLLEIIQSSIEGYSVELGIEELLSKIILSS
IQSSRVDLGIKELLVKICQSSIQSTSVILETKEWLVKIFQSNIQSSSMDLETKVWLVKFF
QSSIQSSSMDLGTIKWLVKNVQSNIQSSRVDLETKRMLLEIIQSSIQNSSVHRGTKKMLL
KVIQSSIQSFSVDLET

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