The domain within your query sequence starts at position 1361 and ends at position 1432; the E-value for the RPT_2 domain shown below is 5.65e-6.

GSASSEKGRAKDREHSGSEKDNPDKRKSGAQPDKESTVDRLSEQGHFKTLSQSSKETRTS
EKHESVRGSSNK

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