The domain within your query sequence starts at position 578 and ends at position 912; the E-value for the RPT_2 domain shown below is 1.83e-16.

PWFWSEKQPNMDLGSEPCSDIMAGAEEEPIIGPWFWAKVDNSVEAEVNSKSSLEDEEEPI
RSPWFGAREQTDMKYAAGIRYKPMAEAEDANKKSCVWAKEPCLYPTNRECLKSTLGEKED
TVDPWLWSNNYPRTKTITGSWLWAAEEGNIDDETGEKIKLPTLEDNAFNSWFWKENEESI
VEAPKREEFRPEAEEEDIIGSWFWAGDEDRFEPAAKINEENKIASEDEDTVGSWFWGNEE
ASLEAVRRGTFESAPGIKEEKVTGSWFWTDKAKVGAGSQTVETGSETEEEAIFESLIWAA
KKDSIQAGVKRVSKPKDDGNIAVGSWLWSSDKATK

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