5CSC

STRUCTURE OF AN OPEN FORM OF CHICKEN HEART CITRATE SYNTHASE AT 2.8 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of an open conformation of citrate synthase from chicken heart at 2.8-A resolution

Liao, D.-I.Karpusas, M.Remington, S.J.

(1991) Biochemistry 30: 6031-6036


  • PubMed Abstract: 
  • The X-ray structure of a new crystal form of chicken heart muscle citrate synthase, grown from solutions containing citrate and coenzyme A or L-malate and acetyl coenzyme A, has been determined by molecular replacement at 2.8-A resolution. The space ...

    The X-ray structure of a new crystal form of chicken heart muscle citrate synthase, grown from solutions containing citrate and coenzyme A or L-malate and acetyl coenzyme A, has been determined by molecular replacement at 2.8-A resolution. The space group is P4(3) with a = 58.9 A and c = 259.2 A and contains an entire dimer of molecular weight 100,000 in the asymmetric unit. Both "closed" conformation chicken heart and "open" conformation pig heart citrate synthase models (Brookhaven Protein Data Bank designations 3CTS and 1CTS) were used in the molecular replacement solution, with crystallographic refinement being initiated with the latter. The conventional crystallographic R factor of the final refined model is 19.6% for the data between 6- and 2.8-A resolution. The model has an rms deviation from ideal values of 0.034 A for bond lengths and of 3.6 degrees for bond angles. The conformation of the enzyme is essentially identical with that of a previously determined "open" form of pig heart muscle citrate synthase which crystallizes in a different space group, with one monomer in the asymmetric unit, from either phosphate or citrate solution. The crystalline environment of each subunit of the chicken enzyme is different, yet the conformation is the same in each. The open conformation is therefore not an artifact of crystal packing or crystallization conditions and is not species dependent. Both "open" and "closed" crystal forms of the chicken heart enzyme grow from the same drop, showing that both conformations of the enzyme are present at equilibrium in solution containing reaction products or substrate analogues.


    Related Citations: 
    • Crystal Structure Analysis of the Tetragonal Crystal Form and Preliminary Molecular Model of Pig-Heart Citrate Synthase
      Wiegand, G.,Kukla, D.,Scholze, H.,Jones, T.A.,Huber, R.
      (1979) Eur.J.Biochem. 93: 41
    • Crystallographic Refinement and Atomic Models of Two Different Forms of Citrate Synthase at 2.7 And 1.7 Angstroms Resolution
      Remington, S.,Wiegand, G.,Huber, R.
      (1982) J.Mol.Biol. 158: 111
    • Crystal Structure Analysis and Molecular Model of a Complex of Citrate Synthase with Oxaloacetate and S-Acetonyl-Coenzymea
      Wiegand, G.,Remington, S.,Deisenhofer, J.,Huber, R.
      (1984) J.Mol.Biol. 174: 205
    • Primary Structure of Porcine Heart Citrate Synthase
      Bloxham, D.P.,Parmelee, D.C.,Kumar, S.,Wade, R.D.,Ericsson, L.H.,Neurath, H.,Walsh, K.A.,Titani, K.
      (1981) Proc.Natl.Acad.Sci.USA 78: 5381


    Organizational Affiliation

    Institute of Molecular Biology, University of Oregon, Eugene 97403.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CITRATE SYNTHASE
A
433Gallus gallusMutation(s): 0 
Gene Names: CS
EC: 2.3.3.1
Find proteins for P23007 (Gallus gallus)
Go to Gene View: CS
Go to UniProtKB:  P23007
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CITRATE SYNTHASE
B
429Gallus gallusMutation(s): 0 
Gene Names: CS
EC: 2.3.3.1
Find proteins for P23007 (Gallus gallus)
Go to Gene View: CS
Go to UniProtKB:  P23007
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
A
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 58.850α = 90.00
b = 58.850β = 90.00
c = 259.220γ = 90.00
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1991-04-15
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other