The domain within your query sequence starts at position 439 and ends at position 528; the E-value for the RPT_2 domain shown below is 6e-5.

NHGESCLKDGLGQSSERELTQEVAEPEEAIVQIPQAGGENTITKADDAEGRDEKPIQAEA
QASPGAPINQSGHQDTTGPGSTDAQRTPPH

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