The domain within your query sequence starts at position 584 and ends at position 970; the E-value for the RPT_1 domain shown below is 1.92e-17.

KQPNMDLGSEPCSDIMAGAEEEPIIGPWFWAKVDNSVEAEVNSKSSLEDEEEPIRSPWFG
AREQTDMKYAAGIRYKPMAEAEDANKKSCVWAKEPCLYPTNRECLKSTLGEKEDTVDPWL
WSNNYPRTKTITGSWLWAAEEGNIDDETGEKIKLPTLEDNAFNSWFWKENEESIVEAPKR
EEFRPEAEEEDIIGSWFWAGDEDRFEPAAKINEENKIASEDEDTVGSWFWGNEEASLEAV
RRGTFESAPGIKEEKVTGSWFWTDKAKVGAGSQTVETGSETEEEAIFESLIWAAKKDSIQ
AGVKRVSKPKDDGNIAVGSWLWSSDKATKEAKTLIVSEASPENGKESVVKFGSRAKDEVI
NKTGSGDNCKHSTEAETIVGAWFWEGD

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