5FH4

The structure of rat cytosolic PEPCK variant E89D in complex with beta-sulfopyruvate and GTP

  • Classification: LYASE
  • Organism(s): Rattus norvegicus
  • Expression System: Escherichia coli
  • Mutation(s): 1 

  • Deposited: 2015-12-21 Released: 2016-11-09 
  • Deposition Author(s): Johnson, T.A., Holyoak, T.
  • Funding Organization(s): National Institutes of Health/National Center for Research Resources; Natural Sciences and Engineering Research Council (Canada) 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Utilization of Substrate Intrinsic Binding Energy for Conformational Change and Catalytic Function in Phosphoenolpyruvate Carboxykinase.

Johnson, T.A., Mcleod, M.J., Holyoak, T.

(2016) Biochemistry 55: 575-587

  • DOI: 10.1021/acs.biochem.5b01215
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Phosphoenolpyruvate carboxykinase (PEPCK) is an essential metabolic enzyme operating in the gluconeogenesis and glyceroneogenesis pathways. Previous work has demonstrated that the enzyme cycles between a catalytically inactive open state and a cataly ...

    Phosphoenolpyruvate carboxykinase (PEPCK) is an essential metabolic enzyme operating in the gluconeogenesis and glyceroneogenesis pathways. Previous work has demonstrated that the enzyme cycles between a catalytically inactive open state and a catalytically active closed state. The transition of the enzyme between these states requires the transition of several active site loops to shift from mobile, disordered structural elements to stable ordered states. The mechanism by which these disorder-order transitions are coupled to the ligation state of the active site however is not fully understood. To further investigate the mechanisms by which the mobility of the active site loops is coupled to enzymatic function and the transitioning of the enzyme between the two conformational states, we have conducted structural and functional studies of point mutants of E89. E89 is a proposed key member of the interaction network of mobile elements as it resides in the R-loop region of the enzyme active site. These new data demonstrate the importance of the R-loop in coordinating interactions between substrates at the OAA/PEP binding site and the mobile R- and Ω-loop domains. In turn, the studies more generally demonstrate the mechanisms by which the intrinsic ligand binding energy can be utilized in catalysis to drive unfavorable conformational changes, changes that are subsequently required for both optimal catalytic activity and fidelity.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology, The University of Kansas Medical Center , Kansas City, Kansas 66160, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphoenolpyruvate carboxykinase, cytosolic [GTP]
A
622Rattus norvegicusMutation(s): 1 
Gene Names: Pck1
EC: 4.1.1.32
Find proteins for P07379 (Rattus norvegicus)
Go to UniProtKB:  P07379
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN
Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA
Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GTP
Query on GTP
Download SDF File 
Download CCD File 
A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
EDO
Query on EDO
Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
SPV
Query on SPV
Download SDF File 
Download CCD File 
A
SULFOPYRUVATE
C3 H4 O6 S
BUTHMSUEBYPMKJ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SPVKi: 174000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.590α = 90.00
b = 118.809β = 109.30
c = 60.508γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data reduction
MOLREPphasing
REFMACrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Center for Research ResourcesUnited StatesP20 RR17708
Natural Sciences and Engineering Research Council (Canada)Canada--

Revision History 

  • Version 1.0: 2016-11-09
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Database references, Derived calculations