4Z1Y

Thermostable enolase from Chloroflexus aurantiacus with substrate 2-phosphoglycerate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.53 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Biochemical and Structural Characterization of Enolase from Chloroflexus aurantiacus: Evidence for a Thermophilic Origin.

Zadvornyy, O.A.Boyd, E.S.Posewitz, M.C.Zorin, N.A.Peters, J.W.

(2015) Front Bioeng Biotechnol 3: 74-74

  • DOI: 10.3389/fbioe.2015.00074
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Enolase catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate during both glycolysis and gluconeogenesis, and is required by all three domains of life. Here, we report the purification and biochemical and structural characterization o ...

    Enolase catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate during both glycolysis and gluconeogenesis, and is required by all three domains of life. Here, we report the purification and biochemical and structural characterization of enolase from Chloroflexus aurantiacus, a thermophilic anoxygenic phototroph affiliated with the green non-sulfur bacteria. The protein was purified as a homodimer with a subunit molecular weight of 46 kDa. The temperature optimum for enolase catalysis was 80°C, close to the measured thermal stability of the protein which was determined to be 75°C, while the pH optimum for enzyme activity was 6.5. The specific activities of purified enolase determined at 25 and 80°C were 147 and 300 U mg(-1) of protein, respectively. K m values for the 2-phosphoglycerate/phosphoenolpyruvate reaction determined at 25 and 80°C were 0.16 and 0.03 mM, respectively. The K m values for Mg(2+) binding at these temperatures were 2.5 and 1.9 mM, respectively. When compared to enolase from mesophiles, the biochemical and structural properties of enolase from C. aurantiacus are consistent with this being thermally adapted. These data are consistent with the results of our phylogenetic analysis of enolase, which reveal that enolase has a thermophilic origin.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Montana State University , Bozeman, MT , USA ; Institute of Basic Biological Problems, Russian Academy of Sciences , Pushchino , Russia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Enolase
A, B
426Chloroflexus aurantiacus (strain ATCC 29366 / DSM 635 / J-10-fl)Mutation(s): 0 
Gene Names: eno
EC: 4.2.1.11
Find proteins for A9WCM4 (Chloroflexus aurantiacus (strain ATCC 29366 / DSM 635 / J-10-fl))
Go to UniProtKB:  A9WCM4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
2PG
Query on 2PG

Download SDF File 
Download CCD File 
A, B
2-PHOSPHOGLYCERIC ACID
C3 H7 O7 P
GXIURPTVHJPJLF-UWTATZPHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.53 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.214 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 146.324α = 90.00
b = 146.324β = 90.00
c = 101.883γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
XDSdata reduction
Aimlessdata scaling
BUSTERrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
AFOSRUnited States--

Revision History 

  • Version 1.0: 2015-07-01
    Type: Initial release