The domain within your query sequence starts at position 339 and ends at position 660; the E-value for the 3j5r domain shown below is < 1e-12.
ALAASSGKIGNRHDMLLVEPLNRLLQDKWDRFVKRIFYFNFFVYCLYMIIFTTAAYYRPV
EGLPPYKLNNTVGDYFRVTGEILSVSGGVYFFFRGIQYFLQRRPSLKSLFVDSYSEILFF
VQSLFMLVSVVLYFSHRKEYVASMVFSLAMGWTNMLYYTRGFQQMGIYAVMIEKMILRDL
CRFMFVYLVFLFGFSTAVVTLIEDGKNNSLPVESPPHKCRGSACRPGNSYNSLYSTCLEL
FKFTIGMGDLEFTENYDFKAVFIILLLAYVILTYILLLNMLIALMGETVNKIAQESKNIW
KLQRAITILDTEKSFLKCMRKA
This is a PDB domain - please see the PDBSUM entry of 3j5r for further annotation