The domain within your query sequence starts at position 266 and ends at position 379; the E-value for the RPT_1 domain shown below is 4.95e-7.

EAALAKDIEEITKPDVILANVTQPSTESDMFLAQDMELLTGTEAAHANNIILPTEPDESS
TKDVAPPMEEEIVPGNDTTSPKETETTLPIKMDLAPPEDVLLTKETELAPAKGM

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