The domain within your query sequence starts at position 2 and ends at position 521; the E-value for the RPT_1 domain shown below is 3.81e-221.

PDLSVQLPSADLELKAGQVGVKLPEGQLPEAELPAAQAAAAAGAGLKGHLPKVQMPSLKM
PKVDLKGPHVDLKGPKVDVKGAKGEVSAPDLEVSLPGVEVDIQAPGAKLEGELALADKDV
AAKDSKFKMPKFKMPSFGVSAPGKPSLEASLEVGAPKVEADVAPPQVQGDLKTPDLSVQL
PSADLELKAGQVGVKLPEGQLPEAELPAAQAAAAAGAGLKGHLPKVQMPSLKMPKVDLKG
PHVDLKGPKVDVKGAKGEVSAPDLEVSLPGVEVDIQAPGAKLEGELALADKDVAAKDSKF
KMPEFKMPSFGVSAPGKPSLEASLEVGAPKVEADVAPPQVQGDLKTPDLSVQLPSADLEL
KARQVGVKLPEGQLPEAELPAAQAAAAGAGLKGHLPKVQMPSLKMPKVDLKGPHVDLKGP
KVDVKGAKGEVSAPDLEVSLPGVEVDIQAPGAKLEGELALADKDVAAKDSKFKMPKFKMP
SFGVSAPGKPSLEASLEVGAPNVEADVVPPQVQGDLKTPD

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