Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 35.54 kDa 
• Atom Count: 2668 
• Modelled Residue Count: 290 
• Deposited Residue Count: 318 
• Unique protein chains: 1

1OZP

Crystal Structure of Rv0819 from Mycobacterium tuberculosis MshD-Mycothiol Synthase Acetyl-Coenzyme A Complex.

• PDB DOI: 10.2210/pdb1OZP/pdb

• Classification: TRANSFERASE
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-04-09 Released: 2003-09-09 
• Deposition Author(s): Vetting, M.W., Roderick, S.L., Yu, M., Blanchard, J.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.235 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 

Literature

Crystal structure of mycothiol synthase (Rv0819) from Mycobacterium tuberculosis shows structural homology to the GNAT family of N-acetyltransferases.

Vetting, M.W., Roderick, S.L., Yu, M., Blanchard, J.S.

(2003) Protein Sci 12: 1954-1959

• PubMed: 12930994 
• DOI: 10.1110/ps.03153703
• Primary Citation of Related Structures:  
  1OZP, 1P0H


• PubMed Abstract: 
  

Mycothiol is the predominant low-molecular weight thiol produced by actinomycetes, including Mycobacterium tuberculosis. The last reaction in the biosynthetic pathway for mycothiol is catalyzed by mycothiol synthase (MshD), which acetylates the cysteinyl amine of cysteine-glucosamine-inositol (Cys-GlcN-Ins). The crystal structure of MshD was determined in the presence of coenzyme A and acetyl-CoA. MshD consists of two tandem-repeated domains, each exhibiting the Gcn5-related N-acetyltransferase (GNAT) fold. These two domains superimpose with a root-mean-square deviation of 1.7 A over 88 residues, and each was found to bind one molecule of coenzyme, although the binding sites are quite different. The C-terminal domain has a similar active site to many GNAT members in which the acetyl group of the coenzyme is presented to an open active site slot. However, acetyl-CoA bound to the N-terminal domain is buried, and is apparently not positioned to promote acetyl transfer. A modeled substrate complex indicates that Cys-GlcN-Ins would only fill a portion of a negatively charged channel located between the two domains. This is the first structure determined for an enzyme involved in the biosynthesis of mycothiol.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
hypothetical protein Rv0819	A	318	Mycobacterium tuberculosis H37Rv	Mutation(s): 0  Gene Names: Rv0819, mshD EC: 2.3.1.189
UniProt
Find proteins for P9WJM7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WJM7  Go to UniProtKB:  P9WJM7

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACO	B [auth A], C [auth A]	ACETYL COENZYME *A C23 H38 N7 O17 P3 S ZSLZBFCDCINBPY-ZSJPKINUSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.235 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.9	α = 90
b = 61.69	β = 90
c = 84.53	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing
RESOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-04-09 
• Released Date: 2003-09-09 
Deposition Author(s): Vetting, M.W., Roderick, S.L., Yu, M., Blanchard, J.S.

Revision History  

• Version 1.0: 2003-09-09
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance