4BM5

Chloroplast inner membrane protein TIC110


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.366 
  • R-Value Work: 0.350 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Characterizations of Chloroplast Translocon Protein Tic110.

Tsai, J.-Y.Chu, C.-C.Yeh, Y.-H.Chen, L.-J.Li, H.-M.Hsiao, C.-D.

(2013) Plant J. 75: 847

  • DOI: 10.1111/tpj.12249

  • PubMed Abstract: 
  • Tic110 is a major component of the chloroplast protein import translocon. Two functions with mutually exclusive structures have been proposed for Tic110: a protein-conducting channel with six transmembrane domains and a scaffold with two N-terminal t ...

    Tic110 is a major component of the chloroplast protein import translocon. Two functions with mutually exclusive structures have been proposed for Tic110: a protein-conducting channel with six transmembrane domains and a scaffold with two N-terminal transmembrane domains followed by a large soluble domain for binding transit peptides and other stromal translocon components. To investigate the structure of Tic110, Tic110 from Cyanidioschyzon merolae (CmTic110) was characterized. We constructed three fragments, CmTic110A , CmTic110B and CmTic110C , with increasing N-terminal truncations, to perform small-angle X-ray scattering (SAXS) and X-ray crystallography analyses and Dali structural comparison. Here we report the molecular envelope of CmTic110B and CmTic110C determined by SAXS, and the crystal structure of CmTic110C at 4.2 Å. Our data indicate that the C-terminal half of CmTic110 possesses a rod-shaped helix-repeat structure that is too flattened and elongated to be a channel. The structure is most similar to the HEAT-repeat motif that functions as scaffolds for protein-protein interactions.


    Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei, 11529, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIMILAR TO CHLOROPLAST INNER MEMBRANE PROTEIN TIC110
A
348Cyanidioschyzon merolae (strain 10D)Mutation(s): 0 
Find proteins for M1V6H9 (Cyanidioschyzon merolae (strain 10D))
Go to UniProtKB:  M1V6H9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.366 
  • R-Value Work: 0.350 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 121.100α = 90.00
b = 121.100β = 90.00
c = 242.400γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-12
    Type: Initial release
  • Version 1.1: 2013-09-25
    Type: Database references