ID   TATB_POLNA              Reviewed;         155 AA.
AC   A1VK48;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2007, 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=Pnap_0707;
OS   Polaromonas naphthalenivorans (strain CJ2).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Comamonadaceae; Polaromonas.
OX   NCBI_TaxID=365044;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CJ2;
RX   PubMed=19453698; DOI=10.1111/j.1462-2920.2009.01947.x;
RA   Yagi J.M., Sims D., Brettin T., Bruce D., Madsen E.L.;
RT   "The genome of Polaromonas naphthalenivorans strain CJ2, isolated from coal
RT   tar-contaminated sediment, reveals physiological and metabolic versatility
RT   and evolution through extensive horizontal gene transfer.";
RL   Environ. Microbiol. 11:2253-2270(2009).
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; CP000529; ABM36026.1; -; Genomic_DNA.
DR   RefSeq; WP_011800121.1; NC_008781.1.
DR   AlphaFoldDB; A1VK48; -.
DR   SMR; A1VK48; -.
DR   STRING; 365044.Pnap_0707; -.
DR   EnsemblBacteria; ABM36026; ABM36026; Pnap_0707.
DR   KEGG; pna:Pnap_0707; -.
DR   eggNOG; COG1826; Bacteria.
DR   HOGENOM; CLU_086034_1_1_4; -.
DR   OMA; ARPLWFK; -.
DR   OrthoDB; 2073616at2; -.
DR   Proteomes; UP000000644; 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..155
FT                   /note="Sec-independent protein translocase protein TatB"
FT                   /id="PRO_0000301205"
FT   TRANSMEM        1..21
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00237"
FT   REGION          81..103
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          131..155
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        81..99
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   155 AA;  17251 MW;  D38F06E330221857 CRC64;
     MIDLGISKIA LIGAVALIVI GPEKLPRLAR TVGTLLGKAQ RYVNDVKQEV NRSMELDEFK
     KMKESVEDAA RDVENSIRTG ASDFEKSWSE TTGSTSSDAL PGFEAFPEYR NPKKKWRLKR
     GATPQWFKAR SGIRTKAQSG AARVARFRPQ PSRKA