4HTT

Crystal Structure of Twin Arginine Translocase Receptor- TatC in DDM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.80 Å
  • R-Value Free: 0.418 
  • R-Value Work: 0.344 
  • R-Value Observed: 0.344 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Glove-like Structure of the Conserved Membrane Protein TatC Provides Insight into Signal Sequence Recognition in Twin-Arginine Translocation.

Ramasamy, S.Abrol, R.Suloway, C.J.Clemons, W.M.

(2013) Structure 21: 777-788

  • DOI: 10.1016/j.str.2013.03.004
  • Primary Citation of Related Structures:  
    4HTS, 4HTT

  • PubMed Abstract: 
  • In bacteria, two signal-sequence-dependent secretion pathways translocate proteins across the cytoplasmic membrane. Although the mechanism of the ubiquitous general secretory pathway is becoming well understood, that of the twin-arginine translocatio ...

    In bacteria, two signal-sequence-dependent secretion pathways translocate proteins across the cytoplasmic membrane. Although the mechanism of the ubiquitous general secretory pathway is becoming well understood, that of the twin-arginine translocation pathway, responsible for translocation of folded proteins across the bilayer, is more mysterious. TatC, the largest and most conserved of three integral membrane components, provides the initial binding site of the signal sequence prior to pore assembly. Here, we present two crystal structures of TatC from the thermophilic bacteria Aquifex aeolicus at 4.0 Å and 6.8 Å resolution. The membrane architecture of TatC includes a glove-shaped structure with a lipid-exposed pocket predicted by molecular dynamics to distort the membrane. Correlating the biochemical literature to these results suggests that the signal sequence binds in this pocket, leading to structural changes that facilitate higher order assemblies.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sec-independent protein translocase protein TatC, LysozymeAB418Aquifex aeolicus VF5Escherichia virus T4
This entity is chimeric
Mutation(s): 0 
Gene Names: tatCaq_1267E
EC: 3.2.1.17
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Sec, Translocase, and Insertase Proteins
Protein: 
TatC twin-arginine translocase receptor
Find proteins for O67305 (Aquifex aeolicus (strain VF5))
Explore O67305 
Go to UniProtKB:  O67305
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.80 Å
  • R-Value Free: 0.418 
  • R-Value Work: 0.344 
  • R-Value Observed: 0.344 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 142.015α = 90
b = 142.015β = 90
c = 251.748γ = 90
Software Package:
Software NamePurpose
CNSrefinement
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-05-29
    Changes: Database references
  • Version 1.2: 2017-08-09
    Changes: Advisory, Refinement description, Source and taxonomy
  • Version 1.3: 2019-07-17
    Changes: Data collection, Refinement description