Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 336346.69 
• Atom Count: 23124 
• Residue Count: 2920 
• Unique protein chains: 1

1JOF

Neurospora crassa 3-carboxy-cis,cis-mucoante lactonizing enzyme

• DOI: 10.2210/pdb1JOF/pdb

• Classification: ISOMERASE
• Organism(s): Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987)
• Expression System: Escherichia coli
• Mutation(s): 10 


• Deposited: 2001-07-28 Released: 2002-04-12 
• Deposition Author(s): Kajander, T., Merckel, M.C., Thompson, A., Deacon, A.M., Mazur, P., Kozarich, J.W., Goldman, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.251 
• R-Value Work: 0.212 

Literature

The structure of Neurospora crassa 3-carboxy-cis,cis-muconate lactonizing enzyme, a beta propeller cycloisomerase.

Kajander, T., Merckel, M.C., Thompson, A., Deacon, A.M., Mazur, P., Kozarich, J.W., Goldman, A.

(2002) Structure 10: 483-492

• PubMed: 11937053 


• PubMed Abstract: 
  

Muconate lactonizing enzymes (MLEs) convert cis,cis-muconates to muconolactones in microbes as part of the beta-ketoadipate pathway; some also dehalogenate muconate derivatives of xenobiotic haloaromatics. There are three different MLE classes unrelated by evolution. We present the X-ray structure of a eukaryotic MLE, Neurospora crassa 3-carboxy-cis,cis-muconate lactonizing enzyme (NcCMLE) at 2.5 A resolution, with a seven-bladed beta propeller fold. It is related neither to bacterial MLEs nor to other beta propeller enzymes, but is structurally similar to the G protein beta subunit. It reveals a novel metal-independent cycloisomerase motif unlike the bacterial metal cofactor MLEs. Together, the bacterial MLEs and NcCMLE structures comprise a striking structural example of functional convergence in enzymes for 1,2-addition-elimination of carboxylic acids. NcCMLE and bacterial MLEs may enhance the reaction rate differently: the former by electrophilic catalysis and the latter by electrostatic stabilization of the enolate.

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Related Citations: 

• 3-Carboxy-cis,cis-muconate lactonizing enzyme from Neurospora crassa: MAD phasing with 80 selenomethionines
  Merckel, M.C.,Kajander, T.,Deacon, A.M.,Thompson, A.,Grossmann, J.G.,Kalkkinen, N.,Goldman, A.
  (2002) Acta Crystallogr.,Sect.D 58: 727




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Organizational Affiliation: 

Institute of Biotechnology, Research Program in Structural Biology and Biophysics, University of Helsinki, FIN-00014 Helsinki, Finland.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CARBOXY-CIS,CIS-MUCONATE CYCLASE	A, B, C, D, E, F, G, H	365	Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987)	Mutation(s): 10  EC: 5.5.1.5
Find proteins for P38677 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987)) Go to UniProtKB:  P38677

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PIN	B, H	PIPERAZINE-N,N'-BIS(2-ETHANESULFONIC ACID) PIPES; 1,4-PIPERAZINEDIETHANESULFONIC ACID C8 H18 N2 O6 S2 IHPYMWDTONKSCO-UHFFFAOYSA-N
SO4	A, B, C, D, E, F, G, H	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
BME	A, B, C, D, E, F, G, H	BETA-MERCAPTOETHANOL C2 H6 O S DGVVWUTYPXICAM-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C, D, E, F, G, H	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.5 Å
• R-Value Free: 0.251 
• R-Value Work: 0.212 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 92.290	α = 90.00
b = 160.600	β = 90.00
c = 237.500	γ = 90.00

Software Package:

Software Name	Purpose
SnB	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CCP4	model building
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-07-28 
• Released Date: 2002-04-12 
• Deposition Author(s): Kajander, T., Merckel, M.C., Thompson, A., Deacon, A.M., Mazur, P., Kozarich, J.W., Goldman, A.

Revision History 

• Version 1.0: 2002-04-12
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-04
  Type: Refinement description