The domain within your query sequence starts at position 263 and ends at position 337; the E-value for the RPT_1 domain shown below is 8.6e-5.

YHGHARRAHNNQSWRSDNNQSWRDLNQSWRGRNNQSQRGHDNQSQRGHDNQSRRGHDNQS
QRGHDNQSQRGHNDQ

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