The domain within your query sequence starts at position 516 and ends at position 621; the E-value for the 4bk0 domain shown below is 2e-51.

RKGKEPKIEEFTPPDEDCPLREASSRKIPKLTVKAREHCLRLLEEALISNHQAAGSTHGA
DLQAKAVELEHETFRNAKMVNLYKASVLKKVAEIHKASKDGQLYDM

This is a PDB domain - please see the PDBSUM entry of 4bk0 for further annotation