The domain within your query sequence starts at position 777 and ends at position 854; the E-value for the RPT_1 domain shown below is 3.34e-13.

LRFEGSTGGLRFEGPGGQPVGGLRFEGHRGQPVGGLRFEGPHGQPVGSLRFDNPRGQPVG
GLRFEGGHGPSGAAIRFD

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