The domain within your query sequence starts at position 751 and ends at position 871; the E-value for the RPT_2 domain shown below is 6.17e-6.

PLSGESTAEEASAQVQPPSFEKAPLESLPLEEVEKIHLDNLPFEVQPLPTEDIAIGVPAE
SQALPADENPAREDTVETQPSSFEGAPIAENPIEAPLPASEADTGREDSAVHPSSLAPTD
E

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