The domain within your query sequence starts at position 112 and ends at position 382; the E-value for the 4gxb domain shown below is 1e-64.

ITIQNVELAVFLPDGRSIKVEGLTSDTAERVLEVMAHKLGLQPDLVGYFGLFLIQCFPEG
KLSVVKKLADFELPYTSLQSSEMENCKIGLRKWYLDPALDSMLMDCRAAGDLLYMQAVQD
IEKEWMKPTQAQREELKALQKKENQTKFLELSQEVRHYGYVQLDPCTCNHPEPGCGAQLS
IGNNEISCCITLPNGQIQDIAFQMSRVKCWQVTFLGTLLDTDGPQRTLNQNLELRFQYSE
DSCQQWFVIYTKQAFFLSSCLKKMISERMTK

This is a PDB domain - please see the PDBSUM entry of 4gxb for further annotation