The domain within your query sequence starts at position 390 and ends at position 740; the E-value for the 3eu7 domain shown below is < 1e-12.

STEQTETADRPACDNLNPGNLQLVSELKNPSSSCSVDVSAMWWERAGAKEPCIVTACEDV
VSLWKPLNSLQWEKVHTWHFTEVPVLQIVPVPDVYNLICVALGSLEIREIRALLCSSGDD
SEKQVLLKSGDIKAMLGLTKRRLVSSTGTFCNQQIQIMTFADDGSSKDEQLLMPPDETVL
TFAEVQGTQEALLGTTTVNSIVIWNLKTGQLLKKMHIDDSYQASVCHGAYSEKGLLFVVV
SQPCAKESQALGSPVFQLLVINPKTAQSVGVLLCSLPQGQAGRFLEGDVKDHVAAAVLTS
GTIAIWDLLLGHCTALLPPVSDQSWSLVKWSGTDSHLLAGQKDGNIFIYRY

This is a PDB domain - please see the PDBSUM entry of 3eu7 for further annotation