The domain within your query sequence starts at position 1024 and ends at position 1390; the E-value for the RPT_2 domain shown below is 2.09e-12.

GSTEQKTQIPVVSSALLHKEGPSAYQEDLPDLTEEPLQILGVSEEVSSSSYQRKLPDHIE
VFLKSVGSGSADRKTGAQIVSSSREKSSGFHQQELPNTGGDAVDAFHPEPVVQEVRKVQT
PGAPAGPSSSHFHKEKLSDYQKASPHRDLTESSLKASTVPGLSDQKKKPAVSSGFCLHKE
KHEISASALLNCQTAELLTVTQRSCLHREDPAISTVIKPDDQKIPLPTTFHGSSDQKVKP
VIFVQKQLRDRDQSEDIPKISTVSEPTVVNTVLPVLLPGSYSHREKSDSFYPQELPDGHL
TEVDLKVSSGLGQADQISGLPTGIPGTYSHSEKHQLISEHVQELMDNLNSSESSCLSVDS
MPLNSQI

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