The domain within your query sequence starts at position 838 and ends at position 1006; the E-value for the RPT_2 domain shown below is 9.98e-5.

AGMGPECWPGGDAGHGEAGVYWGAGGYPGQTSEGNDTQKSSLSGDRKLLGCTSPEAKAEG
SFQSADGHGIVGRVYKPGPEGPEDLRSQKSGLQEIQGRNGQGSAGALGRTVEGSRSLQFP
QSWTVGQREAGKPGGAEYEDIGPQDDTWSNLREMGGHCGSGVLASGGRE

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