6HXO

Structure of the citryl-CoA lyase core module of Chlorobium limicola ATP citrate lyase (space group P21)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.195 

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This is version 1.2 of the entry. See complete history


Literature

Structure of ATP citrate lyase and the origin of citrate synthase in the Krebs cycle.

Verschueren, K.H.G.Blanchet, C.Felix, J.Dansercoer, A.De Vos, D.Bloch, Y.Van Beeumen, J.Svergun, D.Gutsche, I.Savvides, S.N.Verstraete, K.

(2019) Nature 568: 571-575

  • DOI: https://doi.org/10.1038/s41586-019-1095-5
  • Primary Citation of Related Structures:  
    6HXH, 6HXI, 6HXJ, 6HXK, 6HXL, 6HXM, 6HXN, 6HXO, 6HXP, 6HXQ, 6QCL, 6QFB

  • PubMed Abstract: 

    Across different kingdoms of life, ATP citrate lyase (ACLY, also known as ACL) catalyses the ATP-dependent and coenzyme A (CoA)-dependent conversion of citrate, a metabolic product of the Krebs cycle, to oxaloacetate and the high-energy biosynthetic precursor acetyl-CoA 1 . The latter fuels pivotal biochemical reactions such as the synthesis of fatty acids, cholesterol and acetylcholine 2 , and the acetylation of histones and proteins 3,4 . In autotrophic prokaryotes, ACLY is a hallmark enzyme of the reverse Krebs cycle (also known as the reductive tricarboxylic acid cycle), which fixates two molecules of carbon dioxide in acetyl-CoA 5,6 . In humans, ACLY links carbohydrate and lipid metabolism and is strongly expressed in liver and adipose tissue 1 and in cholinergic neurons 2,7 . The structural basis of the function of ACLY remains unknown. Here we report high-resolution crystal structures of bacterial, archaeal and human ACLY, and use distinct substrate-bound states to link the conformational plasticity of ACLY to its multistep catalytic itinerary. Such detailed insights will provide the framework for targeting human ACLY in cancer 8-11 and hyperlipidaemia 12,13 . Our structural studies also unmask a fundamental evolutionary relationship that links citrate synthase, the first enzyme of the oxidative Krebs cycle, to an ancestral tetrameric citryl-CoA lyase module that operates in the reverse Krebs cycle. This molecular transition marked a key step in the evolution of metabolism on Earth.


  • Organizational Affiliation

    Unit for Structural Biology, VIB Center for Inflammation Research, Ghent, Belgium.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-citrate lyase alpha-subunit
A, B, C, D, E
A, B, C, D, E, F, G, H
279Chlorobium limicolaMutation(s): 0 
Gene Names: aclA
UniProt
Find proteins for Q9AJC4 (Chlorobium limicola)
Explore Q9AJC4 
Go to UniProtKB:  Q9AJC4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9AJC4
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MES
Query on MES

Download Ideal Coordinates CCD File 
K [auth C],
L [auth C],
N [auth E]
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
FLC (Subject of Investigation/LOI)
Query on FLC

Download Ideal Coordinates CCD File 
I [auth A]
J [auth B]
M [auth E]
O [auth F]
P [auth G]
I [auth A],
J [auth B],
M [auth E],
O [auth F],
P [auth G],
Q [auth H]
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.261α = 90
b = 106.416β = 102.11
c = 105.051γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Research Foundation - FlandersBelgium1524918N

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-05-08
    Changes: Data collection, Database references