The domain within your query sequence starts at position 138 and ends at position 318; the E-value for the RPT_1 domain shown below is 2.7e-16.

SSLHEQSGNHNEEDLCDSKPCGNVLGEQLCLNTEVSMQSQGYSSECNWYGKDILSLLKET
STGQTVSELNQCGKLFSLTPNIMYPSTSTNEKPFECTDCETAFFNQSYFQPDMRPHNGGE
PFDWSKYGNGFIHPTGLAMHLPILNARNPYKFEECGKDFQYFACLNNPMGMCTGEKFCDC
K

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