The domain within your query sequence starts at position 1426 and ends at position 1822; the E-value for the RPT_1 domain shown below is 3.44e-48.

TLAPSTYTTNDITKTQNLFSTGKTSASYTTQHQSTSFHLTTISKWPTNGVSDTPGVHTSS
GTPSSSHATHITYTPPTQVVSSITHSTGPPLGTSVQTTINFPTLSAPQTSLVTPHPGLSS
SSTALTSEILKTPTSSQMVSSASPQTIFSSIHPKTTLEATTPQHTAPLITSITSSITQAQ
SSFSTDKTYTSQHSQPSTMTAHQSRSLPTVTTSTKSTMGLTGTPPVHTTSGTTSSPQTPR
TTHPFSTVAVSNTKHTTGVSLETSVQTTIASPTPSAPQTSLATHLPFSSTSSVTPTSEVI
ITPTPQHTLSSASTSTTTGNILPTTIGQTGSPHTSVPVIYTTSAITQTKTSFSTDRTSTP
TSAPHLSETSAVTAHQSTPTAVSANSIKPTMSSTGTP

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