The domain within your query sequence starts at position 30 and ends at position 194; the E-value for the 3n0a domain shown below is 1e-118.

DTLKDTSSRVIQSVSSYTKGDLDFTYVTSRIIVMSFPVDSVDIGFRNQVDDIRSFLDSRH
LDHYTVYNLSPKSYRTAKFHSRVSECSWPIRQAPSLHNLFAVCRNMYNWLLQNPKNVCVV
HCLDGRAASSILVGAMFIFCNLYSTPGPAVRLLYAKRPGIGLSPS

This is a PDB domain - please see the PDBSUM entry of 3n0a for further annotation