4IHU

Reduced form of disulfide bond oxdioreductase (DsbG) from Mycobacterium tuberculosis

• PDB DOI: https://doi.org/10.2210/pdb4IHU/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2012-12-19 Released: 2013-10-30 
• Deposition Author(s): Harmston, C.A., Goulding, C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.201 
• R-Value Observed: 0.202 

Literature

Structural and biochemical characterization of the essential DsbA-like disulfide bond forming protein from Mycobacterium tuberculosis.

Chim, N., Harmston, C.A., Guzman, D.J., Goulding, C.W.

(2013) BMC Struct Biol 13: 23-23

• PubMed: 24134223 
• DOI: https://doi.org/10.1186/1472-6807-13-23
• Primary Citation of Related Structures:  
  4IHU


• PubMed Abstract: 
  

  Bacterial Disulfide bond forming (Dsb) proteins facilitate proper folding and disulfide bond formation of periplasmic and secreted proteins. Previously, we have shown that Mycobacterium tuberculosis Mt-DsbE and Mt-DsbF aid in vitro oxidative folding of proteins. The M. tuberculosis proteome contains another predicted membrane-tethered Dsb protein, Mt-DsbA, which is encoded by an essential gene.

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Organizational Affiliation: 

Departments of Molecular Biology and Biochemistry, UCI, Irvine, CA 92697, USA. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 3 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.29 kDa 
• Atom Count: 3,307 
• Modelled Residue Count: 409 
• Deposited Residue Count: 448 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isomerase DsbG	A, B	224	Mycobacterium tuberculosis H37Rv	Mutation(s): 0  Gene Names: Rv2969c
UniProt
Find proteins for O33272 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore O33272  Go to UniProtKB:  O33272

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	C [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.201 
• R-Value Observed: 0.202 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.03	α = 90
b = 76.71	β = 90
c = 86.96	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
SHELXS	phasing
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-10-30 
Deposition Author(s): Harmston, C.A., Goulding, C.W.

Revision History  

• Version 1.0: 2013-10-30
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2023-12-06
  Changes: Data collection