The domain within your query sequence starts at position 615 and ends at position 656; the E-value for the RPT_2 domain shown below is 1.56e-6.

PDPFQAEDPFKSDPFKGADPFKGDPFQSDPFSEQQTAATDPF

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