4FM4

Wild Type Fe-type Nitrile Hydratase from Comamonas testosteroni Ni1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Fe-type nitrile hydratase from Comamonas testosteroni Ni1 does not require an activator accessory protein for expression in Escherichia coli.

Kuhn, M.L.Martinez, S.Gumataotao, N.Bornscheuer, U.Liu, D.Holz, R.C.

(2012) Biochem Biophys Res Commun 424: 365-370

  • DOI: https://doi.org/10.1016/j.bbrc.2012.06.036
  • Primary Citation of Related Structures:  
    4FM4

  • PubMed Abstract: 

    We report herein the functional expression of an Fe-type nitrile hydratase (NHase) without the co-expression of an activator protein or the Escherichia coli chaperone proteins GroES/EL. Soluble protein was obtained when the α- and β-subunit genes of the Fe-type NHase Comamonas testosteroni Ni1 (CtNHase) were synthesized with optimized E. coli codon usage and co-expressed. As a control, the Fe-type NHase from Rhodococcus equi TG328-2 (ReNHase) was expressed with (ReNHase(+Act)) and without (ReNHase(-Act)) its activator protein, establishing that expression of a fully functional, metallated ReNHase enzyme requires the co-expression of its activator protein, similar to all other Fe-type NHase enzymes reported to date, whereas the CtNHase does not. The X-ray crystal structure of CtNHase was determined to 2.4Å resolution revealing an αβ heterodimer, similar to other Fe-type NHase enzymes, except for two important differences. First, two His residues reside in the CtNHase active site that are not observed in other Fe-type NHase enzymes and second, the active site Fe(III) ion resides at the bottom of a wide solvent exposed channel. The solvent exposed active site, along with the two active site histidine residues, are hypothesized to play a role in iron incorporation in the absence of an activator protein.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Rd., Chicago, IL 60626, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nitrile hydratase alpha subunit
A, C, E, G, I
A, C, E, G, I, K, M, O
209Comamonas testosteroniMutation(s): 0 
EC: 4.2.1.84
UniProt
Find proteins for J9PBS0 (Comamonas testosteroni)
Explore J9PBS0 
Go to UniProtKB:  J9PBS0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ9PBS0
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nitrile hydratase beta subunit
B, D, F, H, J
B, D, F, H, J, L, N, P
206Comamonas testosteroniMutation(s): 0 
EC: 4.2.1.84
UniProt
Find proteins for J9PBS1 (Comamonas testosteroni)
Explore J9PBS1 
Go to UniProtKB:  J9PBS1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ9PBS1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
AA [auth K]
CA [auth M]
EA [auth O]
Q [auth A]
S [auth C]
AA [auth K],
CA [auth M],
EA [auth O],
Q [auth A],
S [auth C],
U [auth E],
W [auth G],
Y [auth I]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
FE
Query on FE

Download Ideal Coordinates CCD File 
BA [auth K]
DA [auth M]
FA [auth O]
R [auth A]
T [auth C]
BA [auth K],
DA [auth M],
FA [auth O],
R [auth A],
T [auth C],
V [auth E],
X [auth G],
Z [auth I]
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CSD
Query on CSD
A, C, E, G, I
A, C, E, G, I, K, M, O
L-PEPTIDE LINKINGC3 H7 N O4 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.401α = 90
b = 111.401β = 90
c = 475.31γ = 120
Software Package:
Software NamePurpose
HKL-3000data collection
PHASESphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-22
    Type: Initial release
  • Version 1.1: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description