Biological Assembly 1  

 3D View: Structure | 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: 54.04 kDa 
• Atom Count: 3948 
• Residue Count: 499 
• Unique protein chains: 1

1TPF

COMPARISON OF THE STRUCTURES AND THE CRYSTAL CONTACTS OF TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE IN FOUR DIFFERENT CRYSTAL FORMS

• DOI: 10.2210/pdb1TPF/pdb

• Classification: ISOMERASE(INTRAMOLECULAR OXIDOREDUCTASE)
• Organism(s): Trypanosoma brucei brucei
• Mutation(s): No 


• Deposited: 1994-02-28 Released: 1994-05-31 
• Deposition Author(s): Radha Kishan, K.V., Zeelen, J.Ph., Wierenga, R.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.199 
• R-Value Observed: 0.199 

Literature

Comparison of the structures and the crystal contacts of trypanosomal triosephosphate isomerase in four different crystal forms.

Kishan, K.V., Zeelen, J.P., Noble, M.E., Borchert, T.V., Wierenga, R.K.

(1994) Protein Sci 3: 779-787

• PubMed: 8061607 
• DOI: 10.1002/pro.5560030507
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Triosephosphate isomerase (TIM) is a dimeric enzyme consisting of 2 identical subunits. Trypanosomal TIM can be crystallized in 4 different spacegroups: P2(1)2(1)2(1), C2(big cell), C2(small cell), and P1. The P1 crystal form only grows in the presence of 1.4 M DMSO; there are 2 DMSO binding sites per subunit. The structures have been refined at a resolution of 1.83 A, 2.10 A, 2.13 A, and 1.80 A, respectively. In the 4 different spacegroups the TIM subunit can be observed in the context of 7 different crystallographic environments. In the C2 cells, the dimer 2-fold axis coincides with a crystallographic 2-fold axis. The similarities and differences of the 7 subunits are discussed. In 6 subunits the flexible loop (loop 6) is open, whereas in the P2(1)2(1)2(1) cell, the flexible loop of subunit 2 is in an almost closed conformation. The crystal contacts in the 4 different crystal forms are predominantly generated by polar residues in loops. A statistical analysis of the residues involved in crystal contacts shows that, in particular, serines are frequently involved in these interactions; 19% of the exposed serines are involved in crystal contacts.

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Organizational Affiliation: 

European Molecular Biology Laboratory, Heidelberg, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
TRIOSEPHOSPHATE ISOMERASE	A, B	250	Trypanosoma brucei brucei	Mutation(s): 0  EC: 5.3.1.1
Find proteins for P04789 (Trypanosoma brucei brucei) Go to UniProtKB:  P04789

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
DMS	A, B	DIMETHYL SULFOXIDE C2 H6 O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Work: 0.199 
• R-Value Observed: 0.199 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.08	α = 92.27
b = 53.45	β = 74.63
c = 64.71	γ = 116.74

Software Package:

Software Name	Purpose
X-PLOR	model building
TNT	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-02-28 
• Released Date: 1994-05-31 
Deposition Author(s): Radha Kishan, K.V., Zeelen, J.Ph., Wierenga, R.K.

Revision History 

• Version 1.0: 1994-05-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-07-17
  Changes: Data collection, Other, Refinement description
• Version 1.4: 2019-08-14
  Changes: Data collection, Refinement description