The domain within your query sequence starts at position 1 and ends at position 33; the E-value for the SNN_transmemb domain shown below is 1.8e-28.

MSIMDHSPTTGVVTVIVILIAIAALGALILGCW

SNN_transmemb

SNN_transmemb
PFAM accession number:PF09049
Interpro abstract (IPR015135):

This region consists of a single highly hydrophobic transmembrane helix that transverses the lipid bilayer at a 20 degree angle with respect to the membrane normal. It contains a conserved cysteine residue (Cys32) that, together with Cys34 found in the stannin unstructured linker domain, constitutes the putative trimethyltin-binding site that resides at the end of the transmembrane domain close to the lipid/solvent interface [ (PUBMED:16246365) ].

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