8RPL image
Entry Detail
PDB ID:
8RPL
Keywords:
Title:
AMP-forming acetyl-CoA synthetase from Chloroflexota bacterium with bound acetyl AMP
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2024-01-16
Release Date:
2024-06-19
Method Details:
Experimental Method:
Resolution:
2.37 Å
R-Value Free:
0.20
R-Value Work:
0.16
Space Group:
H 3 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Acetate--CoA ligase
Chain IDs:A, B, C, D
Chain Length:657
Number of Molecules:4
Biological Source:Chloroflexota bacterium
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
NEP A HIS modified residue
Primary Citation
Acetyl-CoA synthetase activity is enzymatically regulated by lysine acetylation using acetyl-CoA or acetyl-phosphate as donor molecule.
Nat Commun 15 6002 6002 (2024)
PMID: 39019872 DOI: 10.1038/s41467-024-49952-0

Abstact

The AMP-forming acetyl-CoA synthetase is regulated by lysine acetylation both in bacteria and eukaryotes. However, the underlying mechanism is poorly understood. The Bacillus subtilis acetyltransferase AcuA and the AMP-forming acetyl-CoA synthetase AcsA form an AcuA•AcsA complex, dissociating upon lysine acetylation of AcsA by AcuA. Crystal structures of AcsA from Chloroflexota bacterium in the apo form and in complex with acetyl-adenosine-5'-monophosphate (acetyl-AMP) support the flexible C-terminal domain adopting different conformations. AlphaFold2 predictions suggest binding of AcuA stabilizes AcsA in an undescribed conformation. We show the AcuA•AcsA complex dissociates upon acetyl-coenzyme A (acetyl-CoA) dependent acetylation of AcsA by AcuA. We discover an intrinsic phosphotransacetylase activity enabling AcuA•AcsA generating acetyl-CoA from acetyl-phosphate (AcP) and coenzyme A (CoA) used by AcuA to acetylate and inactivate AcsA. Here, we provide mechanistic insights into the regulation of AMP-forming acetyl-CoA synthetases by lysine acetylation and discover an intrinsic phosphotransacetylase allowing modulation of its activity based on AcP and CoA levels.

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Primary Citation of related structures