1TRI

THE CRYSTAL STRUCTURE OF AN ENGINEERED MONOMERIC TRIOSEPHOSPHATE ISOMERASE, MONOTIM: THE CORRECT MODELLING OF AN EIGHT-RESIDUE LOOP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.165 
  • R-Value Observed: 0.165 

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This is version 1.6 of the entry. See complete history


Literature

The crystal structure of an engineered monomeric triosephosphate isomerase, monoTIM: the correct modelling of an eight-residue loop.

Borchert, T.V.Abagyan, R.Kishan, K.V.Zeelen, J.P.Wierenga, R.K.

(1993) Structure 1: 205-213

  • DOI: https://doi.org/10.1016/0969-2126(93)90021-8
  • Primary Citation of Related Structures:  
    1TRI

  • PubMed Abstract: 

    The triosephosphate isomerase (TIM) fold is found in several different classes of enzymes, most of which are oligomers; TIM itself always functions as a very tight dimer. It has recently been shown that a monomeric form of TIM ('monoTIM') can be constructed by replacing a 15-residue interface loop, loop-3, with an eight-residue fragment; modelling suggests that this should result in a short strain-free turn, resulting in the subsequent helix, helix-A3, having an additional turn at its amino terminus. The crystal structure of monoTIM shows that it retains the characteristic TIM-barrel (betaalpha)8-fold and that the new loop has a structure very close to that predicted. Two other interface loops, loop-1 and loop-4, which contain the active site residues Lys13 and His95, respectively, show significant changes in structure in monoTIM compared with dimeric wild-type TIM. The observed structural differences between monoTIM and wild-type TIM indicate that the dimeric appearance of TIM determines the location and conformation of two of the four catalytic residues.


  • Organizational Affiliation

    European Molecular Biology Laboratory, Meyerhofstrasse 1, Postfach 102209, D69012 Heidelberg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRIOSEPHOSPHATE ISOMERASE243Trypanosoma brucei bruceiMutation(s): 7 
EC: 5.3.1.1
UniProt
Find proteins for P04789 (Trypanosoma brucei brucei)
Explore P04789 
Go to UniProtKB:  P04789
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04789
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.165 
  • R-Value Observed: 0.165 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.78α = 90
b = 42.8β = 108.22
c = 68.84γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
TNTrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-07-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    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
  • Version 1.5: 2021-11-03
    Changes: Database references, Derived calculations
  • Version 1.6: 2024-02-14
    Changes: Data collection