2C27

The Structure of Mycothiol Synthase in Complex with des- AcetylMycothiol and CoenzymeA.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Substrate-Induced Conformational Change of Mycobacterium Tuberculosis Mycothiol Synthase.

Vetting, M.W.Yu, M.Rendle, P.M.Blanchard, J.S.

(2006) J.Biol.Chem. 281: 2795-2802

  • DOI: 10.1074/jbc.M510798200

  • PubMed Abstract: 
  • The structure of the ternary complex of mycothiol synthase from Mycobacterium tuberculosis with bound desacetylmycothiol and CoA was determined to 1.8 A resolution. The structure of the acetyl-CoA-binary complex had shown an active site groove that w ...

    The structure of the ternary complex of mycothiol synthase from Mycobacterium tuberculosis with bound desacetylmycothiol and CoA was determined to 1.8 A resolution. The structure of the acetyl-CoA-binary complex had shown an active site groove that was several times larger than its substrate. The structure of the ternary complex reveals that mycothiol synthase undergoes a large conformational change in which the two acetyltransferase domains are brought together through shared interactions with the functional groups of desacetylmycothiol, thereby decreasing the size of this large central groove. A comparison of the binary and ternary structures illustrates many of the features that promote catalysis. Desacetylmycothiol is positioned with its primary amine in close proximity and in the proper orientation for direct nucleophilic attack on the si-face of the acetyl group of acetyl-CoA. Glu-234 and Tyr-294 are positioned to act as a general base and general acid to promote acetyl transfer. In addition, this structure provides further evidence that the N-terminal acetyltransferase domain no longer has enzymatic activity and is vestigial in nature.


    Organizational Affiliation

    Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461-1602, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYCOTHIOL SYNTHASE
A
315Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: mshD
EC: 2.3.1.189
Find proteins for P9WJM7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WJM7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download SDF File 
Download CCD File 
A
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
 Ligand Interaction
COA
Query on COA

Download SDF File 
Download CCD File 
A
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
MA8
Query on MA8

Download SDF File 
Download CCD File 
A
(2S,3R,5S,6S)-2,3,4,5,6-PENTAHYDROXYCYCLOHEXYL 2-(L-CYSTEINYLAMINO)-2-DEOXY-ALPHA-L-GLUCOPYRANOSIDE
C15 H28 N2 O11 S
ZGXSCMBZZVXWGF-BSEFFJTHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.161 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 37.830α = 90.00
b = 59.620β = 91.57
c = 61.670γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-12-01
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-06-20
    Type: Data collection, Database references, Structure summary