Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 35.84 kDa 
• Atom Count: 2478 
• Modelled Residue Count: 292 
• Deposited Residue Count: 318 
• Unique protein chains: 1

3HZU

Crystal structure of probable thiosulfate sulfurtransferase SSEA (rhodanese) from Mycobacterium tuberculosis

• DOI: 10.2210/pdb3HZU/pdb

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


• Deposited: 2009-06-24 Released: 2009-07-07 
• Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.249 
• R-Value Work: 0.205 
• R-Value Observed: 0.208 

Literature

Mycobacterium thermoresistibile as a source of thermostable orthologs of Mycobacterium tuberculosis proteins.

Edwards, T.E., Liao, R., Phan, I., Myler, P.J., Grundner, C.

(2012) Protein Sci 21: 1093-1096

• PubMed: 22544630 
• DOI: 10.1002/pro.2084
• Primary Citation of Related Structures:  
  3HZU, 3P3A


• PubMed Abstract: 
  

The genus Mycobacterium comprises major human pathogens such as the causative agent of tuberculosis, Mycobacterium tuberculosis (Mtb), and many environmental species. Tuberculosis claims ~1.5 million lives every year, and drug resistant strains of Mtb are rapidly emerging. To aid the development of new tuberculosis drugs, major efforts are currently under way to determine crystal structures of Mtb drug targets and proteins involved in pathogenicity. However, a major obstacle to obtaining crystal structures is the generation of well-diffracting crystals. Proteins from thermophiles can have better crystallization and diffraction properties than proteins from mesophiles, but their sequences and structures are often divergent. Here, we establish a thermophilic mycobacterial model organism, Mycobacterium thermoresistibile (Mth), for the study of Mtb proteins. Mth tolerates higher temperatures than Mtb or other environmental mycobacteria such as M. smegmatis. Mth proteins are on average more soluble than Mtb proteins, and comparison of the crystal structures of two pairs of orthologous proteins reveals nearly identical folds, indicating that Mth structures provide good surrogates for Mtb structures. This study introduces a thermophile as a source of protein for the study of a closely related human pathogen and marks a new approach to solving challenging mycobacterial protein structures.

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Related Citations: 

• Increasing the structural coverage of tuberculosis drug targets.
  Baugh, L., Phan, I., Begley, D.W., Clifton, M.C., Armour, B., Dranow, D.M., Taylor, B.M., Muruthi, M.M., Abendroth, J., Fairman, J.W., Fox, D., Dieterich, S.H., Staker, B.L., Gardberg, A.S., Choi, R., Hewitt, S.N., Napuli, A.J., Myers, J., Barrett, L.K., Zhang, Y., Ferrell, M., Mundt, E., Thompkins, K., Tran, N., Lyons-Abbott, S., Abramov, A., Sekar, A., Serbzhinskiy, D., Lorimer, D., Buchko, G.W., Stacy, R., Stewart, L.J., Edwards, T.E., Van Voorhis, W.C., Myler, P.J.
  (2015) Tuberculosis (Edinb) 95: 142

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Organizational Affiliation: 

Emerald BioStructures, Bainbridge Island, Washington 98110, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thiosulfate sulfurtransferase sseA	A	318	Mycobacterium tuberculosis	Mutation(s): 0  Gene Names: sseA, Rv3283, MT3382, MTCY71.23 EC: 2.8.1.1
Find proteins for P9WHF7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WHF7  Go to UniProtKB:  P9WHF7

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	B [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.249 
• R-Value Work: 0.205 
• R-Value Observed: 0.208 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.73	α = 90
b = 88.327	β = 90
c = 36.794	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-06-24 
• Released Date: 2009-07-07 
Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

Revision History  

• Version 1.0: 2009-07-07
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.2: 2012-06-27
  Changes: Database references
• Version 1.3: 2015-04-22
  Changes: Database references
• Version 1.4: 2017-11-01
  Changes: Refinement description