The domain within your query sequence starts at position 1235 and ends at position 1674; the E-value for the RPT_1 domain shown below is 2.85e-27.

LQSLGSADHRVAEVCPWEVTEPESGMDPPESVNKAKVYSWERTEGGSLEKKPSRQVLSRS
WEEREKVLAESETEGVGAIPRKKPERLVRSQEAVCPWESPDSGGLSPQLVHQESDRTGGR
FVVVSKGDAHPEALPSHAAKAELCLWEMSDVGEGTSTQRVQELPEERQKSPKKATFWGER
NLGGDLVSLCPWESTDFRGPSAVSLQAPGSSGSLGSGIAEVCPWEAENIANDKKAEVCPW
ELGEELAGSDGLNPGADGKSLPGKETPSRKGCLAESGEQTVRAKPTVPQGQESVCPWEDE
APERSSPQPDKASSKAGEKLLSHGGSQVLQVCPWEAVKPEEKQATLSTAEICPWEVDGQP
ETRTSEHPSKGEVHKDEEKMPGRARIKAQEEAEGRIQKQEAICPWESMAPGSTPQRDTEK
AQASLQRQGSVAGRAAEICP

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