The domain within your query sequence starts at position 1586 and ends at position 1981; the E-value for the RPT_1 domain shown below is 7.71e-59.

EQAQALGITPTPQPTTLSPEQAQALGITPTPQPITLTPEQAQALGITPTPQPTTLSPEQA
QALGISLIPKQQEISLSPEQAQALGLTLTPQQAQVQKIYLTPQQAQALGITVSPEQAKAK
GISLTPEEAHSLGIILTVEQAKAKRINLTPQQAQDLGLTLTPEQAQDLGISLIPKQEISF
SPLQAQAMGLTLTPQQAQVQKIYLTPQQAQALGITVSPEQAKGISLTPEEAHSLGIILTV
EQAKAQRINLTPQQAQDLGLTLTPEQAQDLGISLIPKQQEISFSPLQAQAMGLTLTPQQA
QVQKIYLTPQQAQALGITVSPEQAKGISLTPEEAHSLGIILTVEQAKAQRINLTPQQAQD
LGITLTPEQAQDLGISLIPKQQEISFSPLQAQAMGL

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