1P9O

Crystal Structure of Phosphopantothenoylcysteine Synthetase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of human phosphopantothenoylcysteine synthetase at 2.3 A resolution.

Manoj, N.Strauss, E.Begley, T.P.Ealick, S.E.

(2003) Structure 11: 927-936


  • PubMed Abstract: 
  • The structure of human phosphopantothenoylcysteine (PPC) synthetase was determined at 2.3 A resolution. PPC synthetase is a dimer with identical monomers. Some features of the monomer fold resemble a group of NAD-dependent enzymes, while other featur ...

    The structure of human phosphopantothenoylcysteine (PPC) synthetase was determined at 2.3 A resolution. PPC synthetase is a dimer with identical monomers. Some features of the monomer fold resemble a group of NAD-dependent enzymes, while other features resemble the ribokinase fold. The ATP, phosphopantothenate, and cysteine binding sites were deduced from modeling studies. Highly conserved ATP binding residues include Gly43, Ser61, Gly63, Gly66, Phe230, and Asn258. Highly conserved phosphopantothenate binding residues include Asn59, Ala179, Ala180, and Asp183 from one monomer and Arg55' from the adjacent monomer. The structure predicts a ping pong mechanism with initial formation of an acyladenylate intermediate, followed by release of pyrophosphate and attack by cysteine to form the final products PPC and AMP.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphopantothenoylcysteine synthetase
A, B
313Homo sapiensGene Names: PPCS (COAB)
EC: 6.3.2.5
Find proteins for Q9HAB8 (Homo sapiens)
Go to Gene View: PPCS
Go to UniProtKB:  Q9HAB8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.229 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 73.160α = 90.00
b = 73.160β = 90.00
c = 281.830γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
CNSrefinement
DENZOdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-02
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance