4XYL

Ca. Korarchaeum cryptofilum ACD1 in complex with coenzyme A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of NDP-forming Acetyl-CoA synthetase ACD1 reveals a large rearrangement for phosphoryl transfer.

Weie, R.H.Faust, A.Schmidt, M.Schonheit, P.Scheidig, A.J.

(2016) Proc.Natl.Acad.Sci.USA 113: E519-E528

  • DOI: 10.1073/pnas.1518614113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The NDP-forming acyl-CoA synthetases (ACDs) catalyze the conversion of various CoA thioesters to the corresponding acids, conserving their chemical energy in form of ATP. The ACDs are the major energy-conserving enzymes in sugar and peptide fermentat ...

    The NDP-forming acyl-CoA synthetases (ACDs) catalyze the conversion of various CoA thioesters to the corresponding acids, conserving their chemical energy in form of ATP. The ACDs are the major energy-conserving enzymes in sugar and peptide fermentation of hyperthermophilic archaea. They are considered to be primordial enzymes of ATP synthesis in the early evolution of life. We present the first crystal structures, to our knowledge, of an ACD from the hyperthermophilic archaeon Candidatus Korachaeum cryptofilum. These structures reveal a unique arrangement of the ACD subunits alpha and beta within an α2β2-heterotetrameric complex. This arrangement significantly differs from other members of the superfamily. To transmit an activated phosphoryl moiety from the Ac-CoA binding site (within the alpha subunit) to the NDP-binding site (within the beta subunit), a distance of 51 Å has to be bridged. This transmission requires a larger rearrangement within the protein complex involving a 21-aa-long phosphohistidine-containing segment of the alpha subunit. Spatial restraints of the interaction of this segment with the beta subunit explain the necessity for a second highly conserved His residue within the beta subunit. The data support the proposed four-step reaction mechanism of ACDs, coupling acyl-CoA thioesters with ATP synthesis. Furthermore, the determined crystal structure of the complex with bound Ac-CoA allows first insight, to our knowledge, into the determinants for acyl-CoA substrate specificity. The composition and size of loops protruding into the binding pocket of acyl-CoA are determined by the individual arrangement of the characteristic subdomains.


    Organizational Affiliation

    Institut für Allgemeine Mikrobiologie, Kiel University, 24118 Kiel, Germany peter.schoenheit@ifam.uni-kiel.de axel.scheidig@strubio.uni-kiel.de.,Zoological Institute-Structural Biology, Kiel University, 24118 Kiel, Germany; Centre for Biochemistry and Molecular Biology, Kiel University, 24118 Kiel, Germany; peter.schoenheit@ifam.uni-kiel.de axel.scheidig@strubio.uni-kiel.de.,Zoological Institute-Structural Biology, Kiel University, 24118 Kiel, Germany; Centre for Biochemistry and Molecular Biology, Kiel University, 24118 Kiel, Germany;,Zoological Institute-Structural Biology, Kiel University, 24118 Kiel, Germany; Centre for Biotechnology and Biomedicine, Structure Analysis of Biopolymers, Leipzig University, 04103 Leipzig, Germany;,Institut für Allgemeine Mikrobiologie, Kiel University, 24118 Kiel, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
alpha subunit of Acyl-CoA synthetase (NDP forming)
A, C
464Korarchaeum cryptofilum (strain OPF8)Mutation(s): 0 
Find proteins for B1L3C9 (Korarchaeum cryptofilum (strain OPF8))
Go to UniProtKB:  B1L3C9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
beta subunit of Acyl-CoA synthetase (NDP forming)
B, D
230Korarchaeum cryptofilum (strain OPF8)Mutation(s): 0 
Find proteins for B1L7P8 (Korarchaeum cryptofilum (strain OPF8))
Go to UniProtKB:  B1L7P8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
COA
Query on COA

Download SDF File 
Download CCD File 
A, C
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 102.460α = 90.00
b = 112.180β = 90.00
c = 124.890γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHASERphasing
XDSdata reduction
PHENIXrefinement
MOLREPphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-01-27
    Type: Initial release
  • Version 1.1: 2016-02-03
    Type: Database references
  • Version 1.2: 2016-02-10
    Type: Database references
  • Version 1.3: 2018-03-07
    Type: Data collection