4HTT

Crystal Structure of Twin Arginine Translocase Receptor- TatC in DDM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.8 Å
  • R-Value Free: 0.418 
  • R-Value Work: 0.344 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sec-independent protein translocase protein TatC, Lysozyme
A, B
418Aquifex aeolicus (strain VF5)Enterobacteria phage T4
This entity is chimeric
Gene Names: tatC, E
EC: 3.2.1.17
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Sec and Translocase Proteins
Protein: 
TatC twin-arginine translocase receptor
Find proteins for O67305 (Aquifex aeolicus (strain VF5))
Go to UniProtKB:  O67305
Find proteins for P00720 (Enterobacteria phage T4)
Go to UniProtKB:  P00720
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.8 Å
  • R-Value Free: 0.418 
  • R-Value Work: 0.344 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 142.015α = 90.00
b = 142.015β = 90.00
c = 251.748γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PDB_EXTRACTdata extraction
Blu-Icedata collection
CNSrefinement
PHASERphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-05-29
    Type: Database references
  • Version 1.2: 2017-08-09
    Type: Advisory, Refinement description, Source and taxonomy