6-Phosphogluconate dehydrogenase and its crystal structures.
6-phosphogluconate dehydrogenase
allostery
bionanotechnology
drug targets
homotropic cooperativity
induced fit
structure and function
Journal
Acta crystallographica. Section F, Structural biology communications
ISSN: 2053-230X
Titre abrégé: Acta Crystallogr F Struct Biol Commun
Pays: United States
ID NLM: 101620319
Informations de publication
Date de publication:
01 Mar 2022
01 Mar 2022
Historique:
received:
19
11
2021
accepted:
31
01
2022
entrez:
2
3
2022
pubmed:
3
3
2022
medline:
5
4
2022
Statut:
ppublish
Résumé
6-Phosphogluconate dehydrogenase (6PGDH; EC 1.1.1.44) catalyses the oxidative decarboxylation of 6-phosphogluconate to ribulose 5-phosphate in the context of the oxidative part of the pentose phosphate pathway. Depending on the species, it can be a homodimer or a homotetramer. Oligomerization plays a functional role not only because the active site is at the interface between subunits but also due to the interlocking tail-modulating activity, similar to that of isocitrate dehydrogenase and malic enzyme, which catalyse a similar type of reaction. Since the pioneering crystal structure of sheep liver 6PGDH, which allowed motifs common to the β-hydroxyacid dehydrogenase superfamily to be recognized, several other 6PGDH crystal structures have been solved, including those of ternary complexes. These showed that more than one conformation exists, as had been suggested for many years from enzyme studies in solution. It is inferred that an asymmetrical conformation with a rearrangement of one of the two subunits underlies the homotropic cooperativity. There has been particular interest in the presence or absence of sulfate during crystallization. This might be related to the fact that this ion, which is a competitive inhibitor that binds in the active site, can induce the same 6PGDH configuration as in the complexes with physiological ligands. Mutagenesis, inhibitors, kinetic and binding studies, post-translational modifications and research on the enzyme in cancer cells have been complementary to the crystallographic studies. Computational modelling and new structural studies will probably help to refine the understanding of the functioning of this enzyme, which represents a promising therapeutic target in immunity, cancer and infective diseases. 6PGDH also has applied-science potential as a biosensor or a biobattery. To this end, the enzyme has been efficiently immobilized on specific polymers and nanoparticles. This review spans the 6PGDH literature and all of the 6PGDH crystal structure data files held by the Protein Data Bank.
Identifiants
pubmed: 35234135
pii: S2053230X22001091
doi: 10.1107/S2053230X22001091
pmc: PMC8900737
doi:
Substances chimiques
NADP
53-59-8
Phosphogluconate Dehydrogenase
EC 1.1.1.43
Types de publication
Journal Article
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
96-112Informations de copyright
open access.
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