TatA T22P

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural model for the protein-translocating element of the twin-arginine transport system.

Rodriguez, F.Rouse, S.L.Tait, C.E.Harmer, J.De Riso, A.Timmel, C.R.Sansom, M.S.Berks, B.C.Schnell, J.R.

(2013) Proc Natl Acad Sci U S A 110: E1092-E1101

  • DOI: https://doi.org/10.1073/pnas.1219486110
  • Primary Citation of Related Structures:  
    2LZR, 2LZS

  • PubMed Abstract: 

    The twin-arginine translocase (Tat) carries out the remarkable process of translocating fully folded proteins across the cytoplasmic membrane of prokaryotes and the thylakoid membrane of plant chloroplasts. Tat is required for bacterial pathogenesis and for photosynthesis in plants. TatA, the protein-translocating element of the Tat system, is a small transmembrane protein that assembles into ring-like oligomers of variable size. We have determined a structural model of the Escherichia coli TatA complex in detergent solution by NMR. TatA assembly is mediated entirely by the transmembrane helix. The amphipathic helix extends outwards from the ring of transmembrane helices, permitting assembly of complexes with variable subunit numbers. Transmembrane residue Gln8 points inward, resulting in a short hydrophobic pore in the center of the complex. Simulations of the TatA complex in lipid bilayers indicate that the short transmembrane domain distorts the membrane. This finding suggests that TatA facilitates protein transport by sensitizing the membrane to transient rupture.

  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford, OX1 3QU, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sec-independent protein translocase protein TatA55Escherichia coli K-12Mutation(s): 1 
Gene Names: b3836JW3813mttA1tatAyigT
Membrane Entity: Yes 
Find proteins for P69428 (Escherichia coli (strain K12))
Explore P69428 
Go to UniProtKB:  P69428
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69428
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on FME
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-20
    Type: Initial release
  • Version 1.1: 2013-04-24
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Derived calculations, Other