HAMAP

Accession	MF_00237
Dates	1-JUN-2001 (Created) 15-JUL-2011 (Last updated, Version 33)

Data class

Protein

Predictors

HAMAP; MF_00237; [distribution of match scores in UniProtKB];[seed alignment for MF_00237]

Names

TatB

Identifier

TATB

Protein name

RecName: Full=Sec-independent protein translocase protein TatB;

Gene name

tatB

Protein name

RecName: Full=Sec-independent protein translocase protein TatB homolog;

FUNCTION: Part of the twin-arginine translocation (Tat) system that transports large folded proteins containing a characteristic twin-arginine motif in their signal peptide across membranes. Together with TatC, TatB is part of a receptor directly interacting with Tat signal peptides. TatB may form an oligomeric binding site that transiently accomodates folded Tat precursor proteins before their translocation (By similarity).

SUBUNIT: The Tat system comprises two distinct complexes: a TatABC complex, containing multiple copies of TatA, TatB and TatC subunits, and a separate TatA complex, containing only TatA subunits. Substrates initially bind to the TatABC complex, which probably triggers association of the separate TatA complex to form the active translocon (By similarity).

SUBCELLULAR LOCATION: Cell membrane; Single-pass membrane protein (By similarity).

SUBCELLULAR LOCATION: Cell inner membrane; Single-pass membrane protein (By similarity).

SIMILARITY: Belongs to the TatB family.

Pfam	PF02416; MttA_Hcf106; 1;
PRINTS	PR01506; TATBPROTEIN; 1;
TIGRFAMs	TIGR01410; TatB; 1;

Cell inner membrane.

Cell membrane, Membrane, Protein transport, Transport, Translocation, Transmembrane, Transmembrane helix.

GO:0008320; Molecular function: protein transmembrane transporter activity.
GO:0043953; Biological process: protein transport by the Tat complex.
GO:0005887; Cellular component: integral to plasma membrane.
GO:0033281; Cellular component: TAT protein transport complex.

From: TATB_ECOLI (P69425)
Key		From		To		Description		Condition		FTGroup
TRANSMEM		1		21		Helical; (Potential)

Size range:	110-246 amino acids
Related UniRules:	None
Template:	P69425 (TATB_ECOLI)
Scope:	Bacteria
Fusion:	Nter: None; Cter: None
Duplicate:	None
Plasmid encoded:	None
Comments:	The Tat system is composed of TatA, TatB and TatC subunits in Gram-negative bacteria and in Actinobacteria, and of TatA and TatC subunits in most Gram-positive bacteria.