The domain within your query sequence starts at position 301 and ends at position 599; the E-value for the RPT_1 domain shown below is 3.65e-15.

KKLAQQLRDTTLLHRFWNLWQSRIEQREERVQTPSLHAALSHYRVTVLHKCVRVWLRYVH
KRQWQQLLRARADGHFQQRALPAAFYTWYRGWLWHQQRRILHTKAVRFHRGTLEKQVFAL
WRQKMSQHRENCLAERMAILQAEQQLLRRFWFVWHQQAAVCQLERQQQAMAIAHHHSGLL
RRAFCIWKESTQGFRIERMGRAQAAHFHSAQLLSRAWSMWRECLALRLEEQQKLKCAALH
SQCILLRRALQKWLVYQNRVRSVLREVAARERQHNRQLLWWALHLWRENTMARLDGAKK

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