The domain within your query sequence starts at position 307 and ends at position 391; the E-value for the RPT_1 domain shown below is 1.55e-5.

KAPVKLESIASVFKDHAEEGSSEDGTKADEKSSDQGVQKVGDTDGTGNLDGKKEDEDPQD
GGSLASTLSKLKRMKREEGTGATEP

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