YjeF N-terminal domain superfamily (IPR036652)
Short name: YjeF_N_dom_sf
- YjeF N-terminal domain (IPR004443)
- Pyridoxamine 5'-phosphate oxidase, plant (IPR021198)
- Bifunctional NAD(P)H-hydrate repair enzyme Nnr (IPR030677)
- YjeF N-terminal domain-containing protein, eukaryotes (IPR032976)
In bacteria or archaea, YjeF N-terminal domains occur either as single proteins or fused with other domains and are commonly associated with enzymes. YjeF N-terminal domains are often fused to a YjeF C-terminal domain. It is a bifunctional enzyme that catalyses the epimerisation of the S- and R-forms of NAD(P)HX and the dehydration of the S-form of NAD(P)HX at the expense of ADP, which is converted to AMP [PMID: 21994945].
Structurally, YjeF N-terminal domains represent a novel version of the Rossmann fold, one of the most common protein folds in nature. The YjeF N-terminal domain is comprised of a three-layer alpha-beta-alpha sandwich with a central beta-sheet surrounded by helices. This domain contains a putative catalytic site [PMID: 15257761].
The YjeF N-terminal domain is homologous to AIBP in mammals and YNL200C in budding yeasts. AIBP and YNL200C are NAD(P)H-hydrate epimerases that catalyses the epimerisation of the S- and R-forms of NAD(P)HX, at the expense of ATP, which is converted to ADP [PMID: 21994945].
Some proteins known to contain a YjeF N-terminal domain are listed below:
- Escherichia coli hypothetical protein YjeF.
- Thermotoga maritima hypothetical protein Tm0922.
- Yeast uncharacterised protein YNL200C.
- Yeast enhancer of mRNA-decapping protein 3 (EDC3).
- Vertebrate enhancer of mRNA-decapping protein 3 (EDC3).
- Mammalian apolipoprotein A-I binding protein (AI-BP).