The domain within your query sequence starts at position 289 and ends at position 522; the E-value for the RPT_1 domain shown below is 1.11e-6.

NSTCEPCPYGSYSNGSDCTHCPAGTEPAVGFEYKWWNTLPSNMETTVLSGINFEYKGLTG
WEVAGDHIYTAVGASDNDFMILTLVVPGFRPPQSVVADTENKEVARITFVFETICSVNCE
LYFMVGMNSRTNTPVETWKGTKGKQSYTYTIEENATVSFTWAFQRTTLHETGRKYTNDVA
KIYSINVTNVMGGVASYCRPCALEASDLGSSCTSCPAGHYINRDSGTCHLCPSN

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