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 

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:  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 ...

    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‚ÄČkDa 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
5-methyltetrahydrofolate corrinoid/iron sulfur protein methyltransferase
A, B
262Moorella thermoaceticaGene Names: acsE
EC: 2.1.1.258
Find proteins for Q46389 (Moorella thermoacetica)
Go to UniProtKB:  Q46389
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Corrinoid/iron-sulfur protein large subunit
C, E
446Moorella thermoaceticaGene Names: acsC
Find proteins for Q07340 (Moorella thermoacetica)
Go to UniProtKB:  Q07340
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Corrinoid/iron-sulfur protein small subunit
D, F
323Moorella thermoaceticaGene Names: acsD
Find proteins for Q07341 (Moorella thermoacetica)
Go to UniProtKB:  Q07341
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SF4
Query on SF4

Download SDF File 
Download CCD File 
C, E
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
D, E, F
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
B12
Query on B12

Download SDF File 
Download CCD File 
C, E
COBALAMIN
C62 H89 Co N13 O14 P
LKVIQTCSMMVGFU-DWSMJLPVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 125.614α = 90.00
b = 242.843β = 90.00
c = 79.665γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
PHENIXrefinement
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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