1T5D

4-Chlorobenzoyl-CoA Ligase/Synthetase bound to 4-chlorobenzoate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.206 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structure of 4-Chlorobenzoate:CoA Ligase/Synthetase in the Unliganded and Aryl Substrate-Bound States

Gulick, A.M.Lu, X.Dunaway-Mariano, D.

(2004) Biochemistry 43: 8670-8679

  • DOI: 10.1021/bi049384m
  • Primary Citation of Related Structures:  1T5H

  • PubMed Abstract: 
  • 4-Chlorobenzoate:CoA ligase (CBAL) is a member of a family of adenylate-forming enzymes that catalyze two-step adenylation and thioester-forming reactions. In previous studies, we have provided structural evidence that members of this enzyme family ( ...

    4-Chlorobenzoate:CoA ligase (CBAL) is a member of a family of adenylate-forming enzymes that catalyze two-step adenylation and thioester-forming reactions. In previous studies, we have provided structural evidence that members of this enzyme family (exemplified by acetyl-CoA synthetase) use a large domain rotation to catalyze the respective partial reactions [A. M. Gulick, V. J. Starai, A. R. Horswill, K. M. Homick, and J. C. Escalante-Semerena, (2003) Biochemistry 42, 2866-2873]. CBAL catalyzes the synthesis of 4-chlorobenzoyl-CoA, the first step in the 4-chlorobenzoate degredation pathway in PCB-degrading bacteria. We have solved the 2.0 A crystal structure of the CBAL enzyme from Alcaligenes sp. AL3007 using multiwavelength anomalous dispersion. The results demonstrate that in the absence of any ligands, or bound to the aryl substrate 4-chlorobenzoate, the enzyme adopts the conformation poised for catalysis of the adenylate-forming half-reaction. We hypothesize that coenzyme A binding is required for stabilization of the alternate conformation, which catalyzes the 4-CBA-CoA thioester-forming reaction. We have also determined the structure of the enzyme bound to the aryl substrate 4-chlorobenzoate. The aryl binding pocket is composed of Phe184, His207, Val208, Val209, Phe249, Ala280, Ile303, Gly305, Met310, and Asn311. The structure of the 4-chlorobenzoate binding site is discussed in the context of the binding sites of other family members to gain insight into substrate specificity and evolution of new function.


    Organizational Affiliation

    Hauptman-Woodward Medical Research Institute, State University of New York at Buffalo, Buffalo, New York 14203-1196, USA. gulick@hwi.buffalo.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
4-chlorobenzoyl CoA ligase
X
504Alcaligenes sp. AL3007N/A
Find proteins for Q8GN86 (Alcaligenes sp. AL3007)
Go to UniProtKB:  Q8GN86
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
174
Query on 174

Download SDF File 
Download CCD File 
X
4-CHLORO-BENZOIC ACID
C7 H5 Cl O2
XRHGYUZYPHTUJZ-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
X
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.206 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.178 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 124.979α = 90.00
b = 124.979β = 90.00
c = 69.001γ = 120.00
Software Package:
Software NamePurpose
SnBphasing
DENZOdata reduction
SCALEPACKdata scaling
PHASESphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-08-03
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description