Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 75967.27 
• Atom Count: 5255 
• Residue Count: 707 
• Unique protein chains: 2

1EUC

CRYSTAL STRUCTURE OF DEPHOSPHORYLATED PIG HEART, GTP-SPECIFIC SUCCINYL-COA SYNTHETASE

• DOI: 10.2210/pdb1EUC/pdb

• Classification: LIGASE
• Organism(s): Sus scrofa
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2000-04-14 Released: 2000-07-27 
• Deposition Author(s): Fraser, M.E., James, M.N.G., Bridger, W.A., Wolodko, W.T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.220 
• R-Value Work: 0.158 

Literature

Phosphorylated and dephosphorylated structures of pig heart, GTP-specific succinyl-CoA synthetase.

Fraser, M.E., James, M.N., Bridger, W.A., Wolodko, W.T.

(2000) J.Mol.Biol. 299: 1325-1339

• PubMed: 10873456 
• DOI: 10.1006/jmbi.2000.3807
• Primary Citation of Related Structures:  
  1EUD


• PubMed Abstract: 
  

Succinyl-CoA synthetase (SCS) catalyzes the reversible phosphorylation/dephosphorylation reaction:¿¿¿rm succinyl ¿hbox ¿-¿CoA+NDP+P_i¿leftrightarrow succinate+CoA+NTP¿¿where N denotes adenosine or guanosine. In the course of the reaction, an essential histidine residue is transiently phosphorylated. We have crystallized and solved the structure of the GTP-specific isoform of SCS from pig heart (EC 6.2.1.4) in both the dephosphorylated and phosphorylated forms. The structures were refined to 2.1 A resolution. In the dephosphorylated structure, the enzyme is stabilized via coordination of a phosphate ion by the active-site histidine residue and the two "power" helices, one contributed by each subunit of the alphabeta-dimer. Small changes in the conformations of residues at the amino terminus of the power helix contributed by the alpha-subunit allow the enzyme to accommodate either the covalently bound phosphoryl group or the free phosphate ion. Structural comparisons are made between the active sites in these two forms of the enzyme, both of which can occur along the catalytic path. Comparisons are also made with the structure of Escherichia coli SCS. The domain that has been shown to bind ADP in E. coli SCS is more open in the pig heart, GTP-specific SCS structure.

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Organizational Affiliation: 

Department of Biochemistry, University of Western Ontario, London, Ontario, Canada N6A 5C1.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
SUCCINYL-COA SYNTHETASE, ALPHA CHAIN	A	311	Sus scrofa	Mutation(s): 0  Gene Names: SUCLG1 EC: 6.2.1.4, 6.2.1.5
Find proteins for O19069 (Sus scrofa) Go to Gene View: SUCLG1 Go to UniProtKB:  O19069

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
SUCCINYL-COA SYNTHETASE, BETA CHAIN	B	396	Sus scrofa	Mutation(s): 1  Gene Names: SUCLG2 EC: 6.2.1.4
Find proteins for P53590 (Sus scrofa) Go to Gene View: SUCLG2 Go to UniProtKB:  P53590

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PO4	A	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
ZN	B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CME	B	L-PEPTIDE LINKING	C5 H11 N O3 S2		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.220 
• R-Value Work: 0.158 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 86.798	α = 90.00
b = 81.973	β = 104.53
c = 49.891	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
CNS	refinement
WEIS	data reduction
BIOMOL	data scaling
KBAPLY)	data scaling
WEIS	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-04-14 
• Released Date: 2000-07-27 
• Deposition Author(s): Fraser, M.E., James, M.N.G., Bridger, W.A., Wolodko, W.T.

Revision History 

• Version 1.0: 2000-07-27
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance