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Cloning and overexpression of the triosephosphate isomerase genes from psychrophilic and thermophilic bacteria. Structural comparison of the predicted protein sequences
Rentier-Delrue, Françoise; Mande, Shekhar C; Moyens, Sylvianne et al.
1993In Journal of Molecular Biology, 229 (1), p. 85-93
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Keywords :
Amino Acid Sequence; Bacillus stearothermophilus/enzymology; Base Sequence; Cloning, Molecular; Molecular Sequence Data; Moraxella/*enzymology; Recombinant Proteins/biosynthesis/isolation & purification; Sequence Homology, Amino Acid; Temperature; Triose-Phosphate Isomerase/chemistry/*genetics
Abstract :
[en] We focused on the temperature adaptation of triosephosphate isomerase (TIM; E.C. 5.3.1.1.) by comparing the structure of TIMs isolated from bacterial organisms living in either cold or hot environments. The TIM gene from psychrophilic bacteria Moraxella sp. TA137 was cloned and its nucleotide sequence determined. Its deduced amino acid sequence revealed 34% identity with the thermophilic bacteria Bacillus stearothermophilus TIM. Expression vectors were constructed and recombinant Moraxella TA137 and Bacillus stearothermophilus TIMs were overproduced and purified to homogeneity. Recombinant TIM inactivation constants (Ki), measured at various temperatures, compared to those of the mesophilic Escherichia coli recombinant TIM clearly show that Moraxella TA137 and B. stearothermophilus TIMs have respectively psychrophilic and thermophilic characteristics. To try to elucidate the structure-thermolability and structure-thermostability relationship, factors affecting the overall stability of these two TIMs were examined, based on the alignment with the mesophilic chicken TIM, the three-dimensional structure of which is already known. From this comparison, it appears that the adaptability of TIM to high temperature is favored by better stabilizing residues for the helix dipole as well as better helix-forming residues whereas the adaptability of TIM to low temperature seems to reside in the nature of helix-capping residues.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Rentier-Delrue, Françoise ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie et génétique moléculaire - GIGA-R : Coordination scientifique
Mande, Shekhar C
Moyens, Sylvianne
Terpstra, Peter
Mainfroid, Véronique
Goraj, Karine
Lion, Michelle ;  Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire
Hol, Wim G
Martial, Joseph ;  Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire
Language :
English
Title :
Cloning and overexpression of the triosephosphate isomerase genes from psychrophilic and thermophilic bacteria. Structural comparison of the predicted protein sequences
Publication date :
1993
Journal title :
Journal of Molecular Biology
ISSN :
0022-2836
eISSN :
1089-8638
Publisher :
Academic Press, London, United Kingdom
Volume :
229
Issue :
1
Pages :
85-93
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 August 2009

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