Acetoacetyl-CoA Synthetase from Streptomyces lividans

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


The structure of S. lividans acetoacetyl-CoA synthetase shows a novel interaction between the C-terminal extension and the N-terminal domain.

Mitchell, C.A.Tucker, A.C.Escalante-Semerena, J.C.Gulick, A.M.

(2015) Proteins 83: 575-581

  • DOI: https://doi.org/10.1002/prot.24738
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The adenosine monoposphate-forming acyl-CoA synthetase enzymes catalyze a two-step reaction that involves the initial formation of an acyl adenylate that reacts in a second partial reaction to form a thioester between the acyl substrate and CoA. These enzymes utilize a Domain Alternation catalytic mechanism, whereby a ∼ 110 residue C-terminal domain rotates by 140° to form distinct catalytic conformations for the two partial reactions. The structure of an acetoacetyl-CoA synthetase (AacS) is presented that illustrates a novel aspect of this C-terminal domain. Specifically, several acetyl- and acetoacetyl-CoA synthetases contain a 30-residue extension on the C-terminus compared to other members of this family. Whereas residues from this extension are disordered in prior structures, the AacS structure shows that residues from this extension may interact with key catalytic residues from the N-terminal domain.

  • Organizational Affiliation

    Hauptman-Woodward Institute, Buffalo, New York, 14203; Department of Structural Biology, University at Buffalo, Buffalo, New York, 14203.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Acetoacetate-CoA ligase658Streptomyces lividans TK24Mutation(s): 0 
Gene Names: SSPG_06161
Find proteins for D6EQU8 (Streptomyces lividans TK24)
Explore D6EQU8 
Go to UniProtKB:  D6EQU8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD6EQU8
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EDO

Download Ideal Coordinates CCD File 
B [auth A]
C [auth A]
D [auth A]
E [auth A]
F [auth A]
B [auth A],
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
N [auth A],
O [auth A],
P [auth A],
Q [auth A],
R [auth A],
S [auth A],
T [auth A],
U [auth A],
V [auth A],
W [auth A]
C2 H6 O2
Query on CA

Download Ideal Coordinates CCD File 
X [auth A],
Y [auth A]
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.408α = 90
b = 104.408β = 90
c = 133.906γ = 120
Software Package:
Software NamePurpose
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM068440

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-28
    Type: Initial release
  • Version 1.1: 2015-02-25
    Changes: Database references
  • Version 1.2: 2017-09-20
    Changes: Author supporting evidence, Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.3: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.4: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description