The domain within your query sequence starts at position 1756 and ends at position 2284; the E-value for the RPT_1 domain shown below is 2.85e-27.

LQEHGSSRPIEVCPWEAEEVPTGEKAKICPWELNEGTVGKGLEREPGCEPERQRRQNLEE
AGLPFQEEGTSKGDTKLCREQEGEAICPWKPPAQVPKVSDLPLSTVGQGVEGQSLEASDR
ASEKGELRQDLKMGSLPEYITQVVPVDGGGASSELQPISLQEGMVLAGSSSHPHIQCPDQ
PRVSSQPLVSTGDGTAEVCPWDAPDSDSDTKVEPCAQKVTGRVTETEMSRQDEKEKSQEE
KERAPETRDHEGVAVQKMPQTSNFGKQEAVCPRESQDFGVQAATDASDGSKGGSEKVCPW
EVEEVPSIKEAEICPWEASPGAVGEGALDLGQDGESQGEGRAERHLLKAAETVCPLEGTM
SSGLFTQEDVVDTDLPKVGLHGASSPGKGLAELCVWEVTDPEGNKIKGTMADICPWEETR
AQSDESGPLALPVTQAGVPAAPEKSVCLSVHGPLESFLPESKSVRPDISKPPGSSRPEGV
REQEPLELETGAKSVPKPSPTETEAPESFTLTDDQGLMASEGEAGELSP

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