The domain within your query sequence starts at position 577 and ends at position 857; the E-value for the RPT_1 domain shown below is 4.23e-5.

STEKSISETIQIETNGVSSFGDTLAPLPMSATTQRVYTTVTKETTSRHPKVKSTISTVAE
ASPFSTMLEVTDESEQMVTASVTISPFTDIEKLTTALSKETATAEVGVSWLSTKLKESMP
ESSHNGTTESFNSTHTYTVDWTSEKSKGNSASSPNSASTQALPELPSSSTMKTMGVTFST
NSSQRTAASLSAGILSPQTASTHALVTPQLLTHTFSLPVNISAVTSPKTTMVFFDETKVT
LSQPSTLARDFTTSMPSVGSTLPTVTMTTELVPPVSPTAST

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