The domain within your query sequence starts at position 503 and ends at position 581; the E-value for the d1hv8a2 domain shown below is 2e-8.

KYSGKMKVLQQLLNHFRKQRDKVLLFSFSTKLLDVLQQYCMASGLDYRRLDGSTKSEERL
KIVKEFNSSQDVNICLVST

This is a SCOP domain - please see the SCOP entry of d1hv8a2 for further annotation