The domain within your query sequence starts at position 770 and ends at position 937; the E-value for the RPT_3 domain shown below is 7.16e-5.

PDALGGTTIIYQQGAEESTAVATQTALDLLLNMSAQRELGATALQVAVVKSEGIEAELTS
TGGQPSPEDTTPRVVTLHMAESGSSVAAESQLGPSDLQQIALPSGPFGGASYSVITAPPV
EGRTSASGPPYREEPPGEAAQAVVVSDTLKEAGTHYIMAADGTQLHHI

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