The domain within your query sequence starts at position 639 and ends at position 742; the E-value for the RPT_1 domain shown below is 9.45e-5.

NPAWSTGAGDWADSSSVLGHLGDGKKNGSGWDADGNRSGSGWNDATRCGTSGWGSGTNAK
VNPGTNWGESLKPGPQQNWAHKPQDNNVSNWGGAASVKQTGTGW

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