1IDM image
Entry Detail
PDB ID:
1IDM
Keywords:
Title:
3-ISOPROPYLMALATE DEHYDROGENASE, LOOP-DELETED CHIMERA
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
1995-05-19
Release Date:
1995-09-15
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 32 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:3-ISOPROPYLMALATE DEHYDROGENASE
Mutations:LOOP-DELETED MUTANT, ARG 82 AND LYS 83 DELETED
Chain IDs:A
Chain Length:343
Number of Molecules:1
Biological Source:Thermus thermophilus
Primary Citation
Structure of a loop-deleted variant of 3-isopropylmalate dehydrogenase from Thermus thermophilus: an internal reprieve tolerance mechanism.
Acta Crystallogr.,Sect.D 52 124 128 (1996)
PMID: 15299733 DOI: 10.1107/S0907444995007190

Abstact

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.

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Primary Citation of related structures