The domain within your query sequence starts at position 523 and ends at position 717; the E-value for the 3a98 domain shown below is 2e-99.

SPPIVELREKIQPEILELIKQQRLNRLCEGSSFRKIGNRRRQERFWHCRLALNHKVLHYG
DLDDNPQGEVTFESLQEKIPVADIKAIVTGKDCPHMKEKSALKQNKEVLELAFSILYDPD
ETLNFIAPNKYEYCIWIDGLSALLGKDMSSELTKSDLDTLLSMEMKLRLLDLENIQIPEA
PPPVPKEPSSYDFVY

This is a PDB domain - please see the PDBSUM entry of 3a98 for further annotation