1KNG

Crystal structure of CcmG reducing oxidoreductase at 1.14 A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.151 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of CcmG/DsbE at 1.14 A resolution: high-fidelity reducing activity in an indiscriminately oxidizing environment

Edeling, M.A.Guddat, L.W.Fabianek, R.A.Thony-Meyer, L.Martin, J.L.

(2002) Structure 10: 973-979


  • PubMed Abstract: 
  • CcmG is unlike other periplasmic thioredoxin (TRX)-like proteins in that it has a specific reducing activity in an oxidizing environment and a high fidelity of interaction. These two unusual properties are required for its role in c-type cytochrome m ...

    CcmG is unlike other periplasmic thioredoxin (TRX)-like proteins in that it has a specific reducing activity in an oxidizing environment and a high fidelity of interaction. These two unusual properties are required for its role in c-type cytochrome maturation. The crystal structure of CcmG reveals a modified TRX fold with an unusually acidic active site and a groove formed from two inserts in the fold. Deletion of one of the groove-forming inserts disrupts c-type cytochrome formation. Two unique structural features of CcmG-an acidic active site and an adjacent groove-appear to be necessary to convert an indiscriminately binding scaffold, the TRX fold, into a highly specific redox protein.


    Related Citations: 
    • The active-site cysteines of the periplasmic thioredoxin-like protein CcmG of Escherichia coli are important but not essential for cytochrome c maturation in vivo.
      Fabianek, R.A.,Hennecke, H.,Thony-Meyer, L.
      (1998) J.BACTERIOL. 180: 1947
    • Characterization of the Bradyrhizobium japonicum CycY protein, a membrane-anchored periplasmic thioredoxin that may play a role as a reductant in the biogenesis of c-type cytochromes
      Fabianek, R.A.,Huber-Wunderlich, M.,Glockshuber, R.,Kunzler, P.,Hennecke, H.,Thony-Meyer, L.
      (1997) J.Biol.Chem. 272: 4467
    • Crystallization and preliminary diffraction studies of native and selenomethionine CcmG (CycY, DsbE)
      Edeling, M.A.,Guddat, L.W.,Fabianek, R.A.,Halliday, J.A.,Jones, A.,Thony-Meyer, L.,Martin, J.L.
      (2001) Acta Crystallogr.,Sect.D 57: 1293


    Organizational Affiliation

    Centre for Drug Design and Development and Special Research Centre for Functional and Applied Genomics, Institute for Molecular Bioscience, Brisbane QLD 4072, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THIOL:DISULFIDE INTERCHANGE PROTEIN CYCY
A
156Bradyrhizobium diazoefficiens (strain JCM 10833 / IAM 13628 / NBRC 14792 / USDA 110)Gene Names: cycY (ccmG)
Find proteins for P30960 (Bradyrhizobium diazoefficiens (strain JCM 10833 / IAM 13628 / NBRC 14792 / USDA 110))
Go to UniProtKB:  P30960
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.151 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 35.100α = 90.00
b = 48.200β = 90.00
c = 90.200γ = 90.00
Software Package:
Software NamePurpose
SOLOMONphasing
SOLVEphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-07-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance