1lld
From Proteopedia
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MOLECULAR BASIS OF ALLOSTERIC ACTIVATION OF BACTERIAL L-LACTATE DEHYDROGENASE
Overview
The three-dimensional structure of allosteric L-lactate dehydrogenase from Bifidobacterium longum, the first example of a T-state structure of L-lactate dehydrogenase, has been determined to 2.0 A. A comparative study of this structure with the previously reported R-state structure from Bacillus stearothermophilus has revealed the allosteric activation mechanism of the bacterial L-lactate dehydrogenase. The fructose 1,6-bisphosphate-induced conformational change at the effector site and the substrate affinity change at the activity site are clearly shown at a molecular level. Coupling of these changes can be simply explained by a set of concerted rotations between subunits in the tetramer of the enzyme. This T to R transition is the first example for a tetrameric allosteric protein where the rotations occur around each of three axes of symmetry.
About this Structure
1LLD is a Single protein structure of sequence from Bifidobacterium longum bv. longum with as ligand. Active as L-lactate dehydrogenase, with EC number 1.1.1.27 Full crystallographic information is available from OCA.
Reference
Molecular basis of allosteric activation of bacterial L-lactate dehydrogenase., Iwata S, Ohta T, J Mol Biol. 1993 Mar 5;230(1):21-7. PMID:8450537
Page seeded by OCA on Thu Feb 21 13:46:01 2008
