The domain within your query sequence starts at position 158 and ends at position 265; the E-value for the 3cl3 domain shown below is 2e-53.

VTSLLGELQESQSRLEAATKDRQALEGRIRAVSEQVRQLESEREVLQQQHSVQVDQLRMQ
NQSVEAALRMERQAASEEKRKLAQLQAAYHQLFQDYDSHIKSSKGMQL

This is a PDB domain - please see the PDBSUM entry of 3cl3 for further annotation