The domain within your query sequence starts at position 297 and ends at position 353; the E-value for the RPT_9 domain shown below is 7.22e-9.

GFPGPRGEPGSHGPPGFPGFKGIQGAAGEPGLFGFLGPKGDLGDRGYPGPPGILLTP

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