2XZ9

CRYSTAL STRUCTURE FROM THE PHOSPHOENOLPYRUVATE-BINDING DOMAIN OF ENZYME I IN COMPLEX WITH PYRUVATE FROM THE THERMOANAEROBACTER TENGCONGENSIS PEP-SUGAR PHOSPHOTRANSFERASE SYSTEM (PTS)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Phosphoenolpyruvate: Sugar Phosphotransferase System from the Hyperthermophilic Thermoanaerobacter Tengcongensis.

Navdaeva, V.Zurbriggen, A.Waltersperger, S.M.Schneider, P.Oberholzer, A.E.Bahler, P.Bachler, C.Grieder, A.Baumann, U.Erni, B.

(2011) Biochemistry 50: 1184

  • DOI: 10.1021/bi101721f
  • Primary Citation of Related Structures:  
    2XZ7, 2XZ9

  • PubMed Abstract: 
  • Thermoanaerobacter tengcongensis is a thermophilic eubacterium that has a phosphoenolpyruvate (PEP) sugar phosphotransferase system (PTS) of 22 proteins. The general PTS proteins, enzyme I and HPr, and the transporters for N-acetylglucosamine (EIICB(GlcNAc)) and fructose (EIIBC(Fru)) have thermal unfolding transitions at ∼90 °C and a temperature optimum for in vitro sugar phosphotransferase activity of 65 °C ...

    Thermoanaerobacter tengcongensis is a thermophilic eubacterium that has a phosphoenolpyruvate (PEP) sugar phosphotransferase system (PTS) of 22 proteins. The general PTS proteins, enzyme I and HPr, and the transporters for N-acetylglucosamine (EIICB(GlcNAc)) and fructose (EIIBC(Fru)) have thermal unfolding transitions at ∼90 °C and a temperature optimum for in vitro sugar phosphotransferase activity of 65 °C. The phosphocysteine of a EIICB(GlcNAc) mutant is unusually stable at room temperature with a t(1/2) of 60 h. The PEP binding C-terminal domain of enzyme I (EIC) forms a metastable covalent adduct with PEP at 65 °C. Crystallization of this adduct afforded the 1.68 Å resolution structure of EIC with a molecule of pyruvate in the active site. We also report the 1.83 Å crystal structure of the EIC-PEP complex. The comparison of the two structures with the apo form and with full-length EI shows differences between the active site side chain conformations of the PEP and pyruvate states but not between the pyruvate and apo states. In the presence of PEP, Arg465 forms a salt bridge with the phosphate moiety while Glu504 forms salt bridges with Arg186 and Arg195 of the N-terminal domain of enzyme I (EIN), which stabilizes a conformation appropriate for the in-line transfer of the phosphoryl moiety from PEP to His191. After transfer, Arg465 swings 4.8 Å away to form an alternative salt bridge with the carboxylate of Glu504. Glu504 loses the grip of Arg186 and Arg195, and the EIN domain can swing away to hand on the phosphoryl group to the phosphoryl carrier protein HPr.


    Organizational Affiliation

    Department for Chemistry and Biochemistry, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PHOSPHOENOLPYRUVATE-PROTEIN KINASE (PTS SYSTEM EI COMPONENT IN BACTERIA)A, B324Caldanaerobacter subterraneus subsp. tengcongensisMutation(s): 0 
EC: 2.7.3.9
UniProt
Find proteins for Q8R7R4 (Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4))
Explore Q8R7R4 
Go to UniProtKB:  Q8R7R4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8R7R4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PYR
Query on PYR

Download Ideal Coordinates CCD File 
D [auth A],
F [auth B]
PYRUVIC ACID
C3 H4 O3
LCTONWCANYUPML-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A],
E [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.113α = 90
b = 79.525β = 90
c = 156.75γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance