The domain within your query sequence starts at position 608 and ends at position 684; the E-value for the RPT_1 domain shown below is 3.71e-8.

GGIWQSNKDTQEAQRFALGISAINEAVDSGDVGRTLSALRSPDVGLYGVIPECGETYQSD
LAEAKKKRLAAGDNNSK

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