The effects of multiple ancestral residues on the Thermus thermophilus 3-isopropylmalate dehydrogenase.


Abstract

Previously, we showed that mutants of Thermus thermophilus 3-isopropylmalate dehydrogenase (IPMDH) each containing a residue (ancestral residue) that had been predicted to exist in a postulated common ancestor protein often have greater thermal stabilities than does the contemporary wild-type enzyme. In this study, the combined effects of multiple ancestral residues were analyzed. Two mutants, containing multiple mutations, Sup3mut (Val181Thr/Pro324Thr/Ala335Glu) and Sup4mut (Leu134Asn/Val181Thr/Pro324Thr/Ala335Glu) were constructed and show greater thermal stabilities than the wild-type and single-point mutant IPMDHs do. Most of the mutants have similar or improved catalytic efficiencies at 70 degrees C when compared with the wild-type IPMDH. Study holds ProTherm entries: 22914, 22915, 22916, 22917 Extra Details: 0.5 mM EDTA was added in the experiment Ancestral residue; Protein stability; 3-Isopropylmalate dehydrogenase; Thermus thermophilus

Submission Details

ID: PVqRqV6H3

Submitter: Connie Wang

Submission Date: April 24, 2018, 8:54 p.m.

Version: 1

Publication Details
Watanabe K;Yamagishi A,FEBS Lett. (2006) The effects of multiple ancestral residues on the Thermus thermophilus 3-isopropylmalate dehydrogenase. PMID:16797545
Additional Information

Structure view and single mutant data analysis

Study data

No weblogo for data of varying length.
Colors: D E R H K S T N Q A V I L M F Y W C G P
 

Data Distribution

Studies with similar sequences (approximate matches)

Correlation with other assays (exact sequence matches)


Relevant PDB Entries

Structure ID Release Date Resolution Structure Title
1WAL 1999-05-17T00:00:00+0000 2.27 3-ISOPROPYLMALATE DEHYDROGENASE (IPMDH) MUTANT (M219A)FROM THERMUS THERMOPHILUS
4F7I 2012-05-16T00:00:00+0000 2.0 Structure of Isopropylmalate dehydrogenase from Thermus thermophilus in complex with IPM, Mn and NADH
2Y41 2011-01-04T00:00:00+0000 2.2 Structure of Isopropylmalate dehydrogenase from Thermus thermophilus - complex with IPM and MN
1DR8 2000-01-06T00:00:00+0000 2.7 STRUCTURE OF MODIFIED 3-ISOPROPYLMALATE DEHYDROGENASE AT THE C-TERMINUS, HD177
2Y3Z 2011-01-04T00:00:00+0000 1.83 Structure of Isopropylmalate dehydrogenase from Thermus thermophilus - apo enzyme
2Y40 2011-01-04T00:00:00+0000 2.5 Structure of Isopropylmalate dehydrogenase from Thermus thermophilus - complex with Mn
2Y42 2011-01-04T00:00:00+0000 2.5 Structure of Isopropylmalate dehydrogenase from Thermus thermophilus - complex with NADH and Mn
1DR0 2000-01-06T00:00:00+0000 2.2 STRUCTURE OF MODIFIED 3-ISOPROPYLMALATE DEHYDROGENASE AT THE C-TERMINUS, HD708
1IPD 1992-01-29T00:00:00+0000 2.2 THREE-DIMENSIONAL STRUCTURE OF A HIGHLY THERMOSTABLE ENZYME, 3-ISOPROPYLMALATE DEHYDROGENASE OF THERMUS THERMOPHILUS AT 2.2 ANGSTROMS RESOLUTION
1IDM 1995-05-19T00:00:00+0000 2.2 3-ISOPROPYLMALATE DEHYDROGENASE, LOOP-DELETED CHIMERA

Relevant UniProtKB Entries

Percent Identity Matching Chains Protein Accession Entry Name
91.9 3-isopropylmalate dehydrogenase P24098 LEU3_THEAQ
100.0 3-isopropylmalate dehydrogenase P61495 LEU3_THETH
99.4 3-isopropylmalate dehydrogenase P61494 LEU3_THET2
100.0 3-isopropylmalate dehydrogenase Q5SIY4 LEU3_THET8