The domain within your query sequence starts at position 2 and ends at position 153; the E-value for the 4b4c domain shown below is 1e-108.

KSYKKFGGPLERLDAIARDAELVDKSETDLRRLGELVHNGCVKALKDSSSGTERAGGRLG
KVKGPTFRISGVQVNAKLVIAHEDELIPLHKSIPSDPEERKQYTIPCHTKAAHFDIDWGK
EDDSNLLIGIYEYGYGSWEMIKMDPDLSLTHK

This is a PDB domain - please see the PDBSUM entry of 4b4c for further annotation