The domain within your query sequence starts at position 483 and ends at position 566; the E-value for the RPT_1 domain shown below is 2.03e-5.

VAKMPLRRPKMKKTPEKLDNTPASPPRSPTEPSDTPIAKGTYTFDIDKWDDPNFNPFSST
SKMQESPKLSQQSYNFDPDACEES

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