The domain within your query sequence starts at position 176 and ends at position 251; the E-value for the RPT_1 domain shown below is 8.8e-50.

REVEEPSSGPYQEMQELPTDLLREVEEPSSGPYQEMQELPTDLLREVEEPSSGPYQEMQE
LPTDLLREVEEPSSDP

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