The domain within your query sequence starts at position 256 and ends at position 450; the E-value for the d1tubb2 domain shown below is 1e-25.

LGDLMEHLVPHPEFKMLGVRNIPQMSAASLAYSAFTWAGLLKHLRQMLISSAKMEEGINW
QVRPPLTGLPPIGKASAHKEHHFNTSLANLVVLRGREVHSADVEGFKDPALYTSWLEPVD
AFSVWKTQRAFDKYEKSAALVSNSQLLVKPLDMIVGKAWNMFSSKAFIHQYTKFGMEEED
FLDSFALLEQVVASY

This is a SCOP domain - please see the SCOP entry of d1tubb2 for further annotation