The domain within your query sequence starts at position 178 and ends at position 666; the E-value for the 1b3u domain shown below is 2e-6.
PLVSKAQLSQTVQSRLVSCKILGKITNKFDAHSIKREILPLVKSLCQDVEYEVRSCMCRQ
LENIAQGIGAELTKNVVLPELIELSRDESGSVRLAAFETLVNMLDMFDTDDRSQTILPLV
KSFCEKSFKADESILISLSFHLGKLCHGLYGIFTPDQHLRFLEFYKKLCTLGLQQENGHN
ESQIPSQIVEQEKKYTSVRKNCAYNFPAMIVFVDPKNFHMELYSTFFCLCHDPEVPVRHT
IAICFYEVSKLLNSGVHLIHKELITLLQDESLEVLDALINHLPEILELMSTGGENSVQEN
KFSSVPDLIPALTAAEQRAAASLKWRTHEKLLQKYTCLPHIISSDQIYYRFLQRMFTIMM
TNNVLPVQRAAARTLCIFLRYNRKQEQRHEVIQKLIEQLGQGKSYWNRLRFLDTCEFIIE
IFSRSFFCKYFFLPVIELTHDPVANVRMKLCYLLPKVKSALKIPADMHLLQQLEMCVRKL
LCQEKDKDV
This is a PDB domain - please see the PDBSUM entry of 1b3u for further annotation
