1TC2

TERNARY SUBSTRATE COMPLEX OF THE HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE FROM TRYPANOSOMA CRUZI

• PDB DOI: https://doi.org/10.2210/pdb1TC2/pdb

• Classification: TRANSFERASE
• Organism(s): Trypanosoma cruzi
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1998-11-04 Released: 2000-03-08 
• Deposition Author(s): Focia, P.J., Craig III, S.P., Eakin, A.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.81 Å
• R-Value Free: 0.232 
• R-Value Work: 0.183 
• R-Value Observed: 0.191 

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)

Macromolecule Content

• Total Structure Weight: 52.37 kDa 
• Atom Count: 3,300 
• Modelled Residue Count: 382 
• Deposited Residue Count: 442 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE)	A, B	221	Trypanosoma cruzi	Mutation(s): 3  EC: 2.4.2.8
UniProt
Find proteins for Q4DRC4 (Trypanosoma cruzi (strain CL Brener)) Explore Q4DRC4  Go to UniProtKB:  Q4DRC4

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PRP	F [auth A], J [auth B]	1-O-pyrophosphono-5-O-phosphono-alpha-D-ribofuranose C5 H13 O14 P3 PQGCEDQWHSBAJP-TXICZTDVSA-N
7HP	E [auth A], I [auth B]	7-HYDROXY-PYRAZOLO[4,3-D]PYRIMIDINE C5 H4 N4 O JFZSDNLQDTYVEE-UHFFFAOYSA-N
MN	H [auth B]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N
MG	C [auth A], D [auth A], G [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.81 Å
• R-Value Free: 0.232 
• R-Value Work: 0.183 
• R-Value Observed: 0.191 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.42	α = 90
b = 101.76	β = 94.23
c = 51.92	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-03-08 
Deposition Author(s): Focia, P.J., Craig III, S.P., Eakin, A.E.

Revision History  

• Version 1.0: 2000-03-08
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-24
  Changes: Database references
• Version 1.4: 2018-01-31
  Changes: Database references
• Version 1.5: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Database references, Derived calculations, Structure summary
• Version 1.6: 2023-08-23
  Changes: Data collection, Database references, Refinement description, Structure summary