The domain within your query sequence starts at position 505 and ends at position 710; the E-value for the Na_trans_cytopl domain shown below is 9.6e-83.

RKKKKQKEQAGEEEKEDAVRKSASEDSIRKKGFRFSLEGSRLTYEKRFSSPHQSLLSIRG
SLFSPRRNSRASLFSFKGRVKDIGSENDFADDEHSTFEDNDSRRDSLFVPHRHGERRPSN
VSQASRASRGIPTLPMNGKMHSAVDCNGVVSLVGGPSALTSPVGQLLPEGTTTETEIRKR
RSSSYHVSMDLLEDPTSRQRAMSMAS

Na_trans_cytopl

 Na_trans_cytopl
PFAM accession number:PF11933
Interpro abstract (IPR024583):

This is a large cytoplasmic domain towards the start of voltage-dependent sodium ion channel proteins in eukaryotes.

This is a PFAM domain. For full annotation and more information, please see the PFAM entry Na_trans_cytopl