The domain within your query sequence starts at position 269 and ends at position 375; the E-value for the 4ae4 domain shown below is 1e-15.

SALTEEEQDLIGPVVALGYPLGRAMEALQKTGRQSLSQFLGYLSACDRLLRQGYDEALVD
EAMEMFQFSEHQAGEFLRLWKQFSDMGFQQDRIKEVLLVHASEGKTA

This is a PDB domain - please see the PDBSUM entry of 4ae4 for further annotation