The domain within your query sequence starts at position 714 and ends at position 787; the E-value for the RPT_3 domain shown below is 9.49e-6.

PLSPAAVPGNQMPPRPPSGQSDSIMHPSMNQSSIAQDRGYMQRNPQMPQYTSPQPGSALS
PRQPSGGQMHSGVG

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