» Articles » PMID: 30662370

Crystal Structures of the Putative Isocitrate Dehydrogenase from Strain 7 in the Apo and NADP-Bound Forms

Overview
Journal Archaea
Specialty Microbiology
Date 2019 Jan 22
PMID 30662370
Citations 1
Authors
Affiliations
Soon will be listed here.
Abstract

Isocitrate dehydrogenase is a catabolic enzyme that acts during the third step of the tricarboxylic acid cycle. The hypothetical protein ST2166 from the archaeon was isolated and crystallized. It shares high primary structure homology with prokaryotic NADP-dependent IDHs, suggesting that these enzymes share a common enzymatic mechanism. The crystal structure of ST2166 was determined at 2.0 Å resolution in the apo form, and then the structure of the crystal soaked with NADP was also determined at 2.4 Å resolution, which contained NADP bound at the putative active site. Comparisons between the structures of apo and NADP-bound forms and NADP-IDHs from other prokaryotes suggest that prokaryotic NADP-IDHs recognize their cofactors using conserved Lys335, Tyr336, and Arg386 in ST2166 at the opening cleft before the domain closure.

Citing Articles

Biochemical Characterization of Recombinant Isocitrate Dehydrogenase and Its Putative Role in the Physiology of an Acidophilic Micrarchaeon.

Winkler D, Gfrerer S, Gescher J Microorganisms. 2021; 9(11).

PMID: 34835444 PMC: 8623467. DOI: 10.3390/microorganisms9112318.

References
1.
. The CCP4 suite: programs for protein crystallography. Acta Crystallogr D Biol Crystallogr. 1994; 50(Pt 5):760-3. DOI: 10.1107/S0907444994003112. View

2.
Murakami M, Kouyama T . Crystal Structures of Two Isozymes of Citrate Synthase from Sulfolobus tokodaii Strain 7. Biochem Res Int. 2016; 2016:7560919. PMC: 5021468. DOI: 10.1155/2016/7560919. View

3.
Cupp J, McAlister-Henn L . NAD(+)-dependent isocitrate dehydrogenase. Cloning, nucleotide sequence, and disruption of the IDH2 gene from Saccharomyces cerevisiae. J Biol Chem. 1991; 266(33):22199-205. View

4.
Brunger A, Adams P, Clore G, DeLano W, Gros P, Grosse-Kunstleve R . Crystallography & NMR system: A new software suite for macromolecular structure determination. Acta Crystallogr D Biol Crystallogr. 1998; 54(Pt 5):905-21. DOI: 10.1107/s0907444998003254. View

5.
Bolduc J, Dyer D, Scott W, Singer P, Sweet R, Koshland Jr D . Mutagenesis and Laue structures of enzyme intermediates: isocitrate dehydrogenase. Science. 1995; 268(5215):1312-8. DOI: 10.1126/science.7761851. View