5TIY | pdb_00005tiy

Schistosoma haematobium (Blood Fluke) Sulfotransferase/S-oxamniquine Complex

• PDB DOI: https://doi.org/10.2210/pdb5TIY/pdb

• Classification: TRANSFERASE
• Organism(s): Schistosoma haematobium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2016-10-03 Released: 2017-05-31 
• Deposition Author(s): Taylor, A.B., Hart, P.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 
  0.214 (Depositor), 0.213 (DCC) 
• R-Value Work: 
  0.167 (Depositor), 0.168 (DCC) 
• R-Value Observed: 
  0.170 (Depositor) 

Starting Model: experimental

Literature

Structural and enzymatic insights into species-specific resistance to schistosome parasite drug therapy.

Taylor, A.B., Roberts, K.M., Cao, X., Clark, N.E., Holloway, S.P., Donati, E., Polcaro, C.M., Pica-Mattoccia, L., Tarpley, R.S., McHardy, S.F., Cioli, D., LoVerde, P.T., Fitzpatrick, P.F., Hart, P.J.

(2017) J Biological Chem 292: 11154-11164

• PubMed: 28536265 
• DOI: https://doi.org/10.1074/jbc.M116.766527
• Primary Citation Related Structures: 
  5TIV, 5TIW, 5TIX, 5TIY, 5TIZ


• PubMed Abstract: 
  

  The antischistosomal prodrug oxamniquine is activated by a sulfotransferase (SULT) in the parasitic flatworm Schistosoma mansoni. Of the three main human schistosome species, only S. mansoni is sensitive to oxamniquine therapy despite the presence of SULT orthologs in Schistosoma hematobium and Schistosoma japonicum The reason for this species-specific drug action has remained a mystery for decades. Here we present the crystal structures of S. hematobium and S. japonicum SULTs, including S. hematobium SULT in complex with oxamniquine. We also examined the activity of the three enzymes in vitro ; surprisingly, all three are active toward oxamniquine, yet we observed differences in catalytic efficiency that implicate kinetics as the determinant for species-specific toxicity. These results provide guidance for designing oxamniquine derivatives to treat infection caused by all species of schistosome to combat emerging resistance to current therapy.

---

Organizational Affiliation: 
• From the Departments of Biochemistry and Structural Biology and [e-mail].
the X-ray Crystallography Core Laboratory, University of Texas Health Science Center, San Antonio, Texas 78229.
Department of Chemistry and Physics, University of South Carolina, Aiken, South Carolina 29801.
From the Departments of Biochemistry and Structural Biology and.
Institute of Chemical Methodologies, Consiglio Nazionale delle Ricerche, Via Salaria Km 29.500, 00015 Monterotondo, Rome, Italy.
Institute of Cell Biology and Neurobiology, Consiglio Nazionale delle Ricerche, Via E. Ramarini 32, 00015 Monterotondo, Rome, Italy.
Center for Innovative Drug Discovery, Department of Chemistry, University of Texas, San Antonio, Texas 78249, and.
Pathology and.
From the Departments of Biochemistry and Structural Biology and [e-mail].
From the Departments of Biochemistry and Structural Biology and [e-mail].
Department of Veterans Affairs, South Texas Veterans Health Care System, San Antonio, Texas 78229.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 29.97 kDa 
• Atom Count: 2,267 
• Modeled Residue Count: 246 
• Deposited Residue Count: 253 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sulfotransferase	A	253	Schistosoma haematobium	Mutation(s): 0  Gene Names: MS3_07706
UniProt
Find proteins for A0A094ZWQ2 (Schistosoma haematobium) Explore A0A094ZWQ2  Go to UniProtKB:  A0A094ZWQ2

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A3P	B [auth A]	ADENOSINE-3'-5'-DIPHOSPHATE C10 H15 N5 O10 P2 WHTCPDAXWFLDIH-KQYNXXCUSA-N
OAQ	C [auth A]	{(2S)-7-nitro-2-[(propan-2-ylamino)methyl]-1,2,3,4-tetrahydroquinolin-6-yl}methanol C14 H21 N3 O3 XCGYUJZMCCFSRP-LBPRGKRZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free:  0.214 (Depositor), 0.213 (DCC) 
• R-Value Work:  0.167 (Depositor), 0.168 (DCC) 
• R-Value Observed: 0.170 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.535	α = 90
b = 73.394	β = 90
c = 139.018	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-05-31 
Deposition Author(s): Taylor, A.B., Hart, P.J.

Revision History  

• Version 1.0: 2017-05-31
  Type: Initial release
  
• Version 1.1: 2017-06-07
  Changes: Database references
• Version 1.2: 2017-07-19
  Changes: Database references
• Version 1.3: 2023-10-04
  Changes: Data collection, Database references, Refinement description