The domain within your query sequence starts at position 131 and ends at position 457; the E-value for the 5mdh domain shown below is 3e-32.
PLQVWIASAGTYVCCHLIPLLLSGEVFGMHTEISLTLFDQEQREDCLRSIVMETQDLASP
VLRTVSFCTTVKEAFLQAQVIIILDDSTEEEVYSLESCLRSRVPLCRLYGYLIEKNAHKS
VKVIVGGKNFVNLKTTLLMQYAPNIASNIIAVALGVEGQAKAVLARKMKTTSANIKDVII
WGNITGNNYVDLRKAKVYNYESAVKGPPGHYHSVLSLIFDREWITKEFVQTLKILSSTGK
QFGGILAAHSIATTLKYWYHGSPPGEIVSLGVMSEGQFDIPEGIVFSMPVKFENGTWVVL
TDLEDISLSEKTLSRLTGDLIQEKLVA
This is a PDB domain - please see the PDBSUM entry of 5mdh for further annotation