The domain within your query sequence starts at position 203 and ends at position 499; the E-value for the CitMHS domain shown below is 1.5e-23.

AQKTKEHHRFSQGLSLCICYSASIGGIATLTGTTPNLVLQGQVNSIFPENSNVVNFASWF
GFAFPTMVILLLLAWLWLQVLFLGVNFRKNFGFGEGEEERKQAAFQVIKTQHRLLGPMSF
AEKAVTFLFVLLVVLWFTREPGFFPGWGDTAFANKKGQSMVSDGTVAIFISLIMFIIPSK
IPGLTEDPKKPGKLKAPPAILTWKTVNDKMPWNILILLGGGFALAKGSEESGLSKWLGDK
LTPLQHVPPSATVLILSLLVAIFTECTSNVATTTLFLPILASMAQAICLHPLYVMLP

CitMHS

 CitMHS
PFAM accession number:PF03600
Interpro abstract (IPR004680):

This domain is found in proteins belonging to the CitM transporter, NhaD Na+/H+ antiporter and Na+/sulfate symporter families, such as CitM from Bacillus subtilis [ (PUBMED:11891560) ], NhaD from Halomonas elongata [ (PUBMED:16872527) ] and SLT1 from Chlamydomonas reinhardtii [ (PUBMED:20498339) ].

GO process:transmembrane transport (GO:0055085)
GO component:integral component of membrane (GO:0016021)

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