Homologous Superfamily

6-phosphogluconate dehydrogenase-like, C-terminal domain superfamily (IPR008927)

Short name: 6-PGluconate_DH-like_C_sf

Overlapping entries



6-phosphogluconate dehydrogenase (EC: catalyses the oxidative decarboxylation of 6-phosphogluconate to ribulose 5-phosphate with the concomitant reduction of NADP to NADPH. The metazoan 6PGDHs have a well-conserved glycine-serine rich sequence at the C terminus, which is lacking from bacterial enzymes and from those of the parasitic protozoan Trypanosoma brucei. The active dimer of the mammalian enzyme assembles with the C-terminal tail of one subunit threaded through the other, forming part of the substrate-binding site. The tail of T. brucei 6PGDH is shorter than that of the mammalian enzyme and its terminal residues associate tightly with the second monomer. The three-dimensional structure shows this generates additional interactions between the subunits close to the active site; the coenzyme-binding domain is thereby associated more tightly with the helical domain. Three residues, conserved in all other known sequences, are important in creating a salt bridge between monomers close to the substrate-binding site [PMID: 9737929].

This domain is structurally similar to domains found in several different families, including those represented by mannitol 2-dehydrogenase, acetohydroxy acid isomeroreductase, short chain L-3-hydroxyacyl CoA dehydrogenase, UDP-glucose/GDP-mannose dehydrogenase (dimerisation domain), N-(1-D-carboxylethyl)-L-norvaline dehydrogenase, glycerol-3-phosphate dehydrogenase, and ketopantoate reductase (PanE).

GO terms

Biological Process

GO:0055114 oxidation-reduction process

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.