ID   TATB_HAEI8              Reviewed;         186 AA.
AC   Q4QP03;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2005, sequence version 1.
DT   25-MAY-2022, entry version 77.
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=NTHI0280;
OS   Haemophilus influenzae (strain 86-028NP).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=281310;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=86-028NP;
RX   PubMed=15968074; DOI=10.1128/jb.187.13.4627-4636.2005;
RA   Harrison A., Dyer D.W., Gillaspy A., Ray W.C., Mungur R., Carson M.B.,
RA   Zhong H., Gipson J., Gipson M., Johnson L.S., Lewis L., Bakaletz L.O.,
RA   Munson R.S. Jr.;
RT   "Genomic sequence of an otitis media isolate of nontypeable Haemophilus
RT   influenzae: comparative study with H. influenzae serotype d, strain KW20.";
RL   J. Bacteriol. 187:4627-4636(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; CP000057; AAX87244.1; -; Genomic_DNA.
DR   RefSeq; WP_005688082.1; NC_007146.2.
DR   AlphaFoldDB; Q4QP03; -.
DR   SMR; Q4QP03; -.
DR   EnsemblBacteria; AAX87244; AAX87244; NTHI0280.
DR   KEGG; hit:NTHI0280; -.
DR   HOGENOM; CLU_086034_1_0_6; -.
DR   OMA; DLMQDYQ; -.
DR   OrthoDB; 2073616at2; -.
DR   Proteomes; UP000002525; 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; IPR018448; TatB.
DR   TIGRFAMs; TIGR01410; tatB; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; Protein transport;
KW   Translocation; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..186
FT                   /note="Sec-independent protein translocase protein TatB"
FT                   /id="PRO_0000301172"
FT   TRANSMEM        1..21
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00237"
FT   REGION          162..186
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   186 AA;  20439 MW;  E6CAF79D96052B70 CRC64;
     MFDIGFSELI LLMVLGLVVL GPKRLPIAIR TVMDWVKTIR GLAANVQNEL KQELKLQELQ
     DSIKKAESLN LQALSPELSK TVEELKAQAD KMKAELEDKA AQAGTTVEDQ IKEIKNAAEN
     AEKPQNAISV EEAAETLSEA EKTPTDLTAL ETHEKVELNT HLSSYYPPDD IEIAPASKSQ
     SSKTKS