ID   TATB_SHEFN              Reviewed;         134 AA.
AC   Q088I2;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   31-OCT-2006, sequence version 1.
DT   25-MAY-2022, entry version 74.
DE   RecName: Full=Sec-independent protein translocase protein TatB {ECO:0000255|HAMAP-Rule:MF_00237};
GN   Name=tatB {ECO:0000255|HAMAP-Rule:MF_00237}; OrderedLocusNames=Sfri_0471;
OS   Shewanella frigidimarina (strain NCIMB 400).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Alteromonadales;
OC   Shewanellaceae; Shewanella.
OX   NCBI_TaxID=318167;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NCIMB 400;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Fredrickson J.K., Kolker E., McCuel L.A., DiChristina T., Nealson K.H.,
RA   Newman D., Tiedje J.M., Zhou J., Romine M.F., Culley D.E., Serres M.,
RA   Chertkov O., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Richardson P.;
RT   "Complete sequence of Shewanella frigidimarina NCIMB 400.";
RL   Submitted (AUG-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Part of the twin-arginine translocation (Tat) system that
CC       transports large folded proteins containing a characteristic twin-
CC       arginine motif in their signal peptide across membranes. Together with
CC       TatC, TatB is part of a receptor directly interacting with Tat signal
CC       peptides. TatB may form an oligomeric binding site that transiently
CC       accommodates folded Tat precursor proteins before their translocation.
CC       {ECO:0000255|HAMAP-Rule:MF_00237}.
CC   -!- SUBUNIT: The Tat system comprises two distinct complexes: a TatABC
CC       complex, containing multiple copies of TatA, TatB and TatC subunits,
CC       and a separate TatA complex, containing only TatA subunits. Substrates
CC       initially bind to the TatABC complex, which probably triggers
CC       association of the separate TatA complex to form the active translocon.
CC       {ECO:0000255|HAMAP-Rule:MF_00237}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00237}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00237}.
CC   -!- SIMILARITY: Belongs to the TatB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00237}.
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DR   EMBL; CP000447; ABI70333.1; -; Genomic_DNA.
DR   RefSeq; WP_011635960.1; NC_008345.1.
DR   AlphaFoldDB; Q088I2; -.
DR   SMR; Q088I2; -.
DR   STRING; 318167.Sfri_0471; -.
DR   EnsemblBacteria; ABI70333; ABI70333; Sfri_0471.
DR   KEGG; sfr:Sfri_0471; -.
DR   eggNOG; COG1826; Bacteria.
DR   HOGENOM; CLU_086034_1_0_6; -.
DR   OMA; AKSMANN; -.
DR   OrthoDB; 2073616at2; -.
DR   Proteomes; UP000000684; Chromosome.
DR   GO; GO:0005887; C:integral component of plasma membrane; IEA:UniProtKB-UniRule.
DR   GO; GO:0033281; C:TAT protein transport complex; IEA:UniProtKB-UniRule.
DR   GO; GO:0008320; F:protein transmembrane transporter activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0043953; P:protein transport by the Tat complex; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00237; TatB; 1.
DR   InterPro; IPR003369; TatA/B/E.
DR   InterPro; IPR018448; TatB.
DR   Pfam; PF02416; TatA_B_E; 1.
DR   TIGRFAMs; TIGR01410; tatB; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; Protein transport;
KW   Reference proteome; Translocation; Transmembrane; Transmembrane helix;
KW   Transport.
FT   CHAIN           1..134
FT                   /note="Sec-independent protein translocase protein TatB"
FT                   /id="PRO_0000301234"
FT   TRANSMEM        2..22
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00237"
FT   REGION          90..134
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        116..134
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   134 AA;  14525 MW;  A47842D6F84AFC11 CRC64;
     MFDGIGFMEL LLIGILGLVV LGPERLPVAV RSLTGWIRAL KRMANSVKDE LEQELKIDQL
     HADLKKAESK GLANLSPELQ ESIDQLKKAA ESVNRPYKVE DTSPVAPKAS PDESPSVVEA
     KSSEATSENS STPK