ID   TATB_HAHCH              Reviewed;         136 AA.
AC   Q2SN18;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   24-JAN-2006, sequence version 1.
DT   25-MAY-2022, entry version 87.
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=HCH_01075;
OS   Hahella chejuensis (strain KCTC 2396).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Oceanospirillales;
OC   Hahellaceae; Hahella.
OX   NCBI_TaxID=349521;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KCTC 2396;
RX   PubMed=16352867; DOI=10.1093/nar/gki1016;
RA   Jeong H., Yim J.H., Lee C., Choi S.-H., Park Y.K., Yoon S.H., Hur C.-G.,
RA   Kang H.-Y., Kim D., Lee H.H., Park K.H., Park S.-H., Park H.-S., Lee H.K.,
RA   Oh T.K., Kim J.F.;
RT   "Genomic blueprint of Hahella chejuensis, a marine microbe producing an
RT   algicidal agent.";
RL   Nucleic Acids Res. 33:7066-7073(2005).
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; CP000155; ABC27956.1; -; Genomic_DNA.
DR   RefSeq; WP_011395031.1; NC_007645.1.
DR   AlphaFoldDB; Q2SN18; -.
DR   SMR; Q2SN18; -.
DR   STRING; 349521.HCH_01075; -.
DR   EnsemblBacteria; ABC27956; ABC27956; HCH_01075.
DR   KEGG; hch:HCH_01075; -.
DR   eggNOG; COG1826; Bacteria.
DR   HOGENOM; CLU_086034_1_1_6; -.
DR   OMA; PLESMIA; -.
DR   OrthoDB; 2073616at2; -.
DR   Proteomes; UP000000238; 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..136
FT                   /note="Sec-independent protein translocase protein TatB"
FT                   /id="PRO_0000301174"
FT   TRANSMEM        1..21
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00237"
FT   REGION          89..136
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        99..120
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        121..136
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   136 AA;  15128 MW;  9BA4D0230CDCE170 CRC64;
     MFDIGFPELA LVAVIGLLVL GPERLPYAAR KTGLWVGRIR RMVSQMSSEI DRQLKAEEMR
     ERLRKEGDTL GLEKIQQTVN EALAEAKKYE DMVEKNPATP MSSKASTPQT PSSGPDPQPV
     ESHSHSDDAS KQHDRS