2CW9

Crystal structure of human Tim44 C-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the human Tim44 C-terminal domain in complex with pentaethylene glycol: ligand-bound form.

Handa, N.Kishishita, S.Morita, S.Akasaka, R.Jin, Z.Chrzas, J.Chen, L.Liu, Z.J.Wang, B.C.Sugano, S.Tanaka, A.Terada, T.Shirouzu, M.Yokoyama, S.

(2007) Acta Crystallogr.,Sect.D 63: 1225-1234

  • DOI: 10.1107/S0907444907051463

  • PubMed Abstract: 
  • Familial oncocytic thyroid carcinoma is associated with a missense mutation, P308Q, in the C-terminal domain of Tim44. Tim44 is the mitochondrial inner-membrane translocase subunit and it functions as a membrane anchor for the mitochondrial heat-shoc ...

    Familial oncocytic thyroid carcinoma is associated with a missense mutation, P308Q, in the C-terminal domain of Tim44. Tim44 is the mitochondrial inner-membrane translocase subunit and it functions as a membrane anchor for the mitochondrial heat-shock protein 70 (mtHsp70). Here, the crystal structure of the human Tim44 C-terminal domain complexed with pentaethylene glycol has been determined at 1.9 A resolution. The overall structure resembles that of the nuclear transport factor 2-like domain. In the crystal structure, pentaethylene glycol molecules are associated at two potential membrane-binding sites: the large hydrophobic cavity and the highly conserved loop between the alpha1 and alpha2 helices near Pro308. A comparison with the yeast homolog revealed that lipid binding induces conformational changes around the alpha1-alpha2 loop, leading to slippage of the alpha1 helix along the large beta-sheet. These changes may play important roles in the translocation of polypeptides across the mitochondrial inner membrane.


    Organizational Affiliation

    Protein Research Group, Genomic Sciences Center, Yokohama Institute, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
translocase of inner mitochondrial membrane
A
194Homo sapiensMutation(s): 0 
Gene Names: TIMM44 (MIMT44, TIM44)
Find proteins for O43615 (Homo sapiens)
Go to Gene View: TIMM44
Go to UniProtKB:  O43615
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1PE
Query on 1PE

Download SDF File 
Download CCD File 
A
PENTAETHYLENE GLYCOL
PEG400
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.218 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 108.119α = 90.00
b = 108.119β = 90.00
c = 114.056γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data reduction
CNSrefinement
SOLVEphasing

Structure Validation

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Entry History 

Revision History 

  • Version 1.0: 2005-12-17
    Type: Initial release
  • Version 1.1: 2007-10-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance