The domain within your query sequence starts at position 986 and ends at position 1037; the E-value for the RPT_2 domain shown below is 3.38e-5.

STDPSTSGSNLPDFELLSRILKTVNVNTPGQSEKPSDPRVRKTPTDPRLQKP

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