4DJD

Crystal structure of folate-free corrinoid iron-sulfur protein (CFeSP) in complex with its methyltransferase (MeTr)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Visualizing molecular juggling within a B12-dependent methyltransferase complex.

Kung, Y.Ando, N.Doukov, T.I.Blasiak, L.C.Bender, G.Seravalli, J.Ragsdale, S.W.Drennan, C.L.

(2012) Nature 484: 265-269

  • DOI: 10.1038/nature10916
  • Primary Citation of Related Structures:  
    4DJD, 4DJE, 4DJF

  • PubMed Abstract: 
  • Derivatives of vitamin B(12) are used in methyl group transfer in biological processes as diverse as methionine synthesis in humans and CO(2) fixation in acetogenic bacteria. This seemingly straightforward reaction requires large, multimodular enzyme complexes that adopt multiple conformations to alternately activate, protect and perform catalysis on the reactive B(12) cofactor ...

    Derivatives of vitamin B(12) are used in methyl group transfer in biological processes as diverse as methionine synthesis in humans and CO(2) fixation in acetogenic bacteria. This seemingly straightforward reaction requires large, multimodular enzyme complexes that adopt multiple conformations to alternately activate, protect and perform catalysis on the reactive B(12) cofactor. Crystal structures determined thus far have provided structural information for only fragments of these complexes, inspiring speculation about the overall protein assembly and conformational movements inherent to activity. Here we present X-ray crystal structures of a complete 220 kDa complex that contains all enzymes responsible for B(12)-dependent methyl transfer, namely the corrinoid iron-sulphur protein and its methyltransferase from the model acetogen Moorella thermoacetica. These structures provide the first three-dimensional depiction of all protein modules required for the activation, protection and catalytic steps of B(12)-dependent methyl transfer. In addition, the structures capture B(12) at multiple locations between its 'resting' and catalytic positions, allowing visualization of the dramatic protein rearrangements that enable methyl transfer and identification of the trajectory for B(12) movement within the large enzyme scaffold. The structures are also presented alongside in crystallo spectroscopic data, which confirm enzymatic activity within crystals and demonstrate the largest known conformational movements of proteins in a crystalline state. Taken together, this work provides a model for the molecular juggling that accompanies turnover and helps explain why such an elaborate protein framework is required for such a simple, yet biologically essential reaction.


    Organizational Affiliation

    Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
5-methyltetrahydrofolate corrinoid/iron sulfur protein methyltransferase AB262Moorella thermoaceticaMutation(s): 0 
Gene Names: acsE
EC: 2.1.1.258
Find proteins for Q46389 (Moorella thermoacetica)
Explore Q46389 
Go to UniProtKB:  Q46389
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Corrinoid/iron-sulfur protein large subunit CE446Moorella thermoaceticaMutation(s): 0 
Gene Names: acsC
Find proteins for Q07340 (Moorella thermoacetica)
Explore Q07340 
Go to UniProtKB:  Q07340
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Corrinoid/iron-sulfur protein small subunit DF323Moorella thermoaceticaMutation(s): 0 
Gene Names: acsD
Find proteins for Q07341 (Moorella thermoacetica)
Explore Q07341 
Go to UniProtKB:  Q07341
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.614α = 90
b = 242.843β = 90
c = 79.665γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-14
    Type: Initial release
  • Version 1.1: 2012-03-28
    Changes: Database references
  • Version 1.2: 2012-04-25
    Changes: Database references
  • Version 1.3: 2012-10-24
    Changes: Non-polymer description