3GJB

CytC3 with Fe(II) and alpha-ketoglutarate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural analysis of an open active site conformation of nonheme iron halogenase CytC3

Wong, C.Fujimori, D.G.Walsh, C.T.Drennan, C.L.

(2009) J.Am.Chem.Soc. 131: 4872-4879

  • DOI: 10.1021/ja8097355
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CytC3, a member of the recently discovered class of nonheme Fe(II) and alpha-ketoglutarate (alphaKG)-dependent halogenases, catalyzes the double chlorination of L-2-aminobutyric acid (Aba) to produce a known Streptomyces antibiotic, gamma,gamma-dichl ...

    CytC3, a member of the recently discovered class of nonheme Fe(II) and alpha-ketoglutarate (alphaKG)-dependent halogenases, catalyzes the double chlorination of L-2-aminobutyric acid (Aba) to produce a known Streptomyces antibiotic, gamma,gamma-dichloroaminobutyrate. Unlike the majority of the Fe(II)-alphaKG-dependent enzymes that catalyze hydroxylation reactions, halogenases catalyze a transfer of halides. To examine the important enzymatic features that discriminate between chlorination and hydroxylation, the crystal structures of CytC3 both with and without alphaKG/Fe(II) have been solved to 2.2 A resolution. These structures capture CytC3 in an open active site conformation, in which no chloride is bound to iron. Comparison of the open conformation of CytC3 with the closed conformation of another nonheme iron halogenase, SyrB2, suggests two important criteria for creating an enzyme-bound Fe-Cl catalyst: (1) the presence of a hydrogen-bonding network between the chloride and surrounding residues, and (2) the presence of a hydrophobic pocket in which the chloride resides.


    Organizational Affiliation

    Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CytC3
A, B
319Streptomyces spMutation(s): 0 
Gene Names: cytC3
Find proteins for D0VX22 (Streptomyces sp)
Go to UniProtKB:  D0VX22
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
AKG
Query on AKG

Download SDF File 
Download CCD File 
A, B
2-OXOGLUTARIC ACID
C5 H6 O5
KPGXRSRHYNQIFN-UHFFFAOYSA-N
 Ligand Interaction
FE2
Query on FE2

Download SDF File 
Download CCD File 
A, B
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.227 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 88.988α = 90.00
b = 88.988β = 90.00
c = 248.442γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
CNSrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description