The domain within your query sequence starts at position 616 and ends at position 741; the E-value for the RPT_7 domain shown below is 1.35e-6.

GPKGSSGDLGKPGEAGNAGVPGQRGAPGKDGEVGPSGPVGPPGLAGERGEQGPPGPTGFQ
GLPGPPGPPGEGGKAGDQGVPGEPGAVGPLGPRGERGNPGERGEPGITGLPGEKGMAGGH
GPDGPK

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