1LTH

T AND R STATES IN THE CRYSTALS OF BACTERIAL L-LACTATE DEHYDROGENASE REVEAL THE MECHANISM FOR ALLOSTERIC CONTROL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.188 
  • R-Value Observed: 0.188 

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This is version 1.4 of the entry. See complete history


Literature

T and R states in the crystals of bacterial L-lactate dehydrogenase reveal the mechanism for allosteric control.

Iwata, S.Kamata, K.Yoshida, S.Minowa, T.Ohta, T.

(1994) Nat Struct Biol 1: 176-185

  • DOI: https://doi.org/10.1038/nsb0394-176
  • Primary Citation of Related Structures:  
    1LTH

  • PubMed Abstract: 

    The crystal structure of L-lactate dehydrogenase from Bifidobacterium longum, determined to 2.5 A resolution, contains a regular 1:1 complex of T- and R-state tetramers. A comparison of these two structures within the same crystal lattice and kinetical characterization of the T-R transition in solution provide an explanation for the molecular mechanism of allosteric activation. Substrate affinity is controlled by helix sliding between subunits which is triggered by the binding of the activator, fructose 1,6-bisphosphate. The proposed mechanism can explain activation by chemical modification and mutagenesis, as well as suggesting why vertebrate counterparts are not allosteric.


  • Organizational Affiliation

    Department of Agricultural Chemistry, University of Tokyo, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
L-LACTATE DEHYDROGENASE (T- AND R- STATE TETRAMER COMPLEX)A [auth T],
B [auth R]
319Bifidobacterium longum subsp. longumMutation(s): 0 
Gene Names: BIFIDOBACTERIUM LONGUM LDH GENE
EC: 1.1.1.27
UniProt
Find proteins for E8ME30 (Bifidobacterium longum subsp. longum (strain ATCC 15707 / DSM 20219 / JCM 1217 / NCTC 11818 / E194b))
Explore E8ME30 
Go to UniProtKB:  E8ME30
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE8ME30
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.188 
  • R-Value Observed: 0.188 
  • Space Group: F 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 148.4α = 90
b = 295.9β = 90
c = 71γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-03-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Other, Structure summary
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references, Structure summary