AC   MF_00237;
DC   Protein; auto
TR   HAMAP; MF_00237; -; 1; level=0
XX
Names: TatB
XX
ID   TATB
case <OC:Pseudomonadota> or <OC:Actinomycetota>
DE   RecName: Full=Sec-independent protein translocase protein TatB;
GN   Name=tatB;
else
DE   RecName: Full=Sec-independent protein translocase protein TatB homolog;
end case
XX
case <OC:Pseudomonadota> or <OC:Actinomycetota>
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   -!- 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.
end case
case not defined <Property:Membrane> or <Property:Membrane=1>
CC   -!- SUBCELLULAR LOCATION: Cell membrane; Single-pass membrane protein.
else case <Property:Membrane=2>
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane; Single-pass membrane
CC       protein.
end case
CC   -!- SIMILARITY: Belongs to the TatB family.
XX
DR   Pfam; PF02416; MttA_Hcf106; 1; trigger=no
DR   PRINTS; PR01506; TATBPROTEIN; 1; trigger=no
DR   NCBIfam; TIGR01410; TatB; 1; trigger=no
XX
case defined <Property:Membrane> and <Property:Membrane=2>
KW   Cell inner membrane
end case
KW   Cell membrane
KW   Membrane
KW   Protein transport
KW   Transport
KW   Translocation
KW   Transmembrane
KW   Transmembrane helix
XX
GO   GO:0008320; F:protein transmembrane transporter activity
GO   GO:0043953; P:protein transport by the Tat complex
GO   GO:0005886; C:plasma membrane
GO   GO:0033281; C:TAT protein transport complex
XX
FT   From: TATB_ECOLI (P69425)
FT   TRANSMEM        1..21
FT                   /note="Helical"
XX
Size: 110-246;
Related: None;
Template: P69425;
Scope:
 Bacteria
Fusion:
 Nter: None
 Cter: None
Duplicate: None
Plasmid: None
Comments: The Tat system is composed of TatA, TatB and TatC subunits in
 Gram-negative bacteria and in Actinomycetota, and of TatA and TatC subunits
 in most Gram-positive bacteria.
XX
# Revision 1.41 2023/06/01
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