1IDM

3-ISOPROPYLMALATE DEHYDROGENASE, LOOP-DELETED CHIMERA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of a loop-deleted variant of 3-isopropylmalate dehydrogenase from Thermus thermophilus: an internal reprieve tolerance mechanism.

Sakurai, M.Ohzeki, M.Miyazaki, K.Moriyama, H.Sato, M.Tanaka, N.Oshima, T.

(1996) Acta Crystallogr D Biol Crystallogr 52: 124-128

  • DOI: 10.1107/S0907444995007190
  • Primary Citation of Related Structures:  
    1IDM

  • PubMed Abstract: 
  • A loop-deleted mutant form of 3-isopropylmalate dehydrogenase from Thermus thermophilus was constructed to investigate the relationship between the flexibility of the structure and the thermostability of the enzyme. The structure of the mutant enzyme ...

    A loop-deleted mutant form of 3-isopropylmalate dehydrogenase from Thermus thermophilus was constructed to investigate the relationship between the flexibility of the structure and the thermostability of the enzyme. The structure of the mutant enzyme was determined by X-ray crystallography and was found to be almost the same as that of the native enzyme with a reduced temperature factor. Although the mutant protein had lost the flexible loop, its function and thermostability had remained unchanged. This phenomenon can be explained by an internal reprieve tolerance mechanism.


    Related Citations: 
    • Purification, Catalytic Properties and Thermal Stability of Threo-Ds-3-Isopropylmalate Dehydrogenase Coded by Leub Gene from an Extreme Thermophile, Thermus Thermophilus Strain Hb8
      Yamada, T., Akutsu, N., Miyazaki, K., Kakinuma, K., Yoshida, M., Oshima, T.
      (1990) J Biochem 108: 449

    Organizational Affiliation

    Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-ISOPROPYLMALATE DEHYDROGENASEA343Thermus thermophilus HB8Mutation(s): 0 
Gene Names: leuBTTHA1230
EC: 1.1.1.85
Find proteins for Q5SIY4 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Explore Q5SIY4 
Go to UniProtKB:  Q5SIY4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.45α = 90
b = 78.45β = 90
c = 158.07γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement
PROCESSdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-09-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance