1JOF

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 

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This is version 1.4 of the entry. See complete history. 


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

  • DOI: 10.1016/s0969-2126(02)00744-x
  • Primary Citation of Related Structures:  
    1JOF

  • 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 ...

    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.

    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 D Biol Crystallogr 58: 727
    Organizational Affiliation: 

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



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CARBOXY-CIS,CIS-MUCONATE CYCLASE
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
365Neurospora crassaMutation(s): 10 
EC: 5.5.1.5
UniProt
Find proteins for P38677 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore P38677 
Go to UniProtKB:  P38677
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38677
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PIN
Query on PIN
Download Ideal Coordinates CCD File 
FA [auth H],
M [auth B]		PIPERAZINE-N,N'-BIS(2-ETHANESULFONIC ACID)
C8 H18 N2 O6 S2
IHPYMWDTONKSCO-UHFFFAOYSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
BA [auth G],
EA [auth H],
I [auth A],
L [auth B],
P [auth C],
BA [auth G],
EA [auth H],
I [auth A],
L [auth B],
P [auth C],
S [auth D],
V [auth E],
Y [auth F]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
BME
Query on BME
Download Ideal Coordinates CCD File 
AA [auth F],
CA [auth G],
DA [auth G],
GA [auth H],
HA [auth H],
AA [auth F],
CA [auth G],
DA [auth G],
GA [auth H],
HA [auth H],
J [auth A],
K [auth A],
N [auth B],
O [auth B],
Q [auth C],
R [auth C],
T [auth D],
U [auth D],
W [auth E],
X [auth E],
Z [auth F]
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.29α = 90
b = 160.6β = 90
c = 237.5γ = 90
Software Package:
Software NamePurpose
SnBphasing
CCP4model building
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4phasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-04-12
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations