ID   SSTT_STRT2              Reviewed;         402 AA.
AC   Q5M5Z0;
DT   13-NOV-2007, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-2005, sequence version 1.
DT   25-MAY-2022, entry version 97.
DE   RecName: Full=Serine/threonine transporter SstT {ECO:0000255|HAMAP-Rule:MF_01582};
DE   AltName: Full=Na(+)/serine-threonine symporter {ECO:0000255|HAMAP-Rule:MF_01582};
GN   Name=sstT {ECO:0000255|HAMAP-Rule:MF_01582}; OrderedLocusNames=stu0303;
OS   Streptococcus thermophilus (strain ATCC BAA-250 / LMG 18311).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=264199;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-250 / LMG 18311;
RX   PubMed=15543133; DOI=10.1038/nbt1034;
RA   Bolotin A., Quinquis B., Renault P., Sorokin A., Ehrlich S.D.,
RA   Kulakauskas S., Lapidus A., Goltsman E., Mazur M., Pusch G.D., Fonstein M.,
RA   Overbeek R., Kyprides N., Purnelle B., Prozzi D., Ngui K., Masuy D.,
RA   Hancy F., Burteau S., Boutry M., Delcour J., Goffeau A., Hols P.;
RT   "Complete sequence and comparative genome analysis of the dairy bacterium
RT   Streptococcus thermophilus.";
RL   Nat. Biotechnol. 22:1554-1558(2004).
CC   -!- FUNCTION: Involved in the import of serine and threonine into the cell,
CC       with the concomitant import of sodium (symport system).
CC       {ECO:0000255|HAMAP-Rule:MF_01582}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-serine(in) + Na(+)(in) = L-serine(out) + Na(+)(out);
CC         Xref=Rhea:RHEA:29575, ChEBI:CHEBI:29101, ChEBI:CHEBI:33384;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01582};
CC       PhysiologicalDirection=right-to-left; Xref=Rhea:RHEA:29577;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01582};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-threonine(in) + Na(+)(in) = L-threonine(out) + Na(+)(out);
CC         Xref=Rhea:RHEA:69999, ChEBI:CHEBI:29101, ChEBI:CHEBI:57926;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01582};
CC       PhysiologicalDirection=right-to-left; Xref=Rhea:RHEA:70001;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01582};
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01582};
CC       Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01582}.
CC   -!- SIMILARITY: Belongs to the dicarboxylate/amino acid:cation symporter
CC       (DAACS) (TC 2.A.23) family. {ECO:0000255|HAMAP-Rule:MF_01582}.
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DR   EMBL; CP000023; AAV60025.1; -; Genomic_DNA.
DR   RefSeq; WP_011225470.1; NC_006448.1.
DR   AlphaFoldDB; Q5M5Z0; -.
DR   SMR; Q5M5Z0; -.
DR   STRING; 264199.stu0303; -.
DR   EnsemblBacteria; AAV60025; AAV60025; stu0303.
DR   GeneID; 66898227; -.
DR   KEGG; stl:stu0303; -.
DR   PATRIC; fig|264199.4.peg.309; -.
DR   eggNOG; COG3633; Bacteria.
DR   HOGENOM; CLU_044581_0_0_9; -.
DR   OMA; PVNLQLC; -.
DR   Proteomes; UP000001170; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015171; F:amino acid transmembrane transporter activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0015293; F:symporter activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0032329; P:serine transport; IEA:InterPro.
DR   GO; GO:0015826; P:threonine transport; IEA:InterPro.
DR   Gene3D; 1.10.3860.10; -; 1.
DR   HAMAP; MF_01582; Ser_Thr_transp_SstT; 1.
DR   InterPro; IPR001991; Na-dicarboxylate_symporter.
DR   InterPro; IPR036458; Na:dicarbo_symporter_sf.
DR   InterPro; IPR023025; Ser_Thr_transp_SstT.
DR   PANTHER; PTHR42865; PTHR42865; 1.
DR   Pfam; PF00375; SDF; 1.
DR   SUPFAM; SSF118215; SSF118215; 1.
PE   3: Inferred from homology;
KW   Amino-acid transport; Cell membrane; Membrane; Reference proteome; Symport;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..402
FT                   /note="Serine/threonine transporter SstT"
FT                   /id="PRO_0000309149"
FT   TRANSMEM        17..37
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        44..64
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        78..98
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        138..158
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        179..199
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        212..232
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        295..315
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
FT   TRANSMEM        336..356
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01582"
SQ   SEQUENCE   402 AA;  42169 MW;  D5E46D6979C9C92F CRC64;
     MKRFISAWNR TSLIKRIAIG VVIGAILGLL IPKITVIGLL GDMFVGGLKA IAPLLVSALV
     ANALSQTREG QQSNMKTIIV LYLFGTFAAA LTAVISHYIF PISLKLGAAS ATKAAAPQGV
     GEVFKDLMLK MVDNPINALS QANYIGVLVW SVVFGFAMRT ASEHTKELLH TLAEVTSQIV
     RWIINLAPFG ILGLVFDTIS KNGVGVLADY GVLILVLVGT MTFVALVINP IIAFVMMGKN
     PFPLVFRCLK DSGITAFFTR SSAANIPVNL QLCEDLGLNP DTYSVSIPLG STINMAGAAV
     TINVLTLAAV TTLGIEVDFA TAFILSVVST ISACGASGIA GGSLLLVPVA CSLFGISNDL
     AMQVVGVGFI VGVIQDSCET ALNSSTDVLF TAVAEKSRWK KS