The NAD+/NADH ratio thus regulates multiple metabolic pathway enzymes including GAPDH, pyruvate dehydrogenase, isocitrate dehydrogenase, α-ketoglutarate dehydrogenase and malate dehydrogenase.
One common hazard is the 'multiple mapping problem,' arising when an enzyme catalyzes conserved or promiscuous reaction steps across multiple pathways or enzyme commission (EC) numbers representing classes with non-specific substrate activity.
In the GA pathway, enzymes that catalyze multiple steps or at the branching points (KO, KAO, GA20ox2, GA3ox, and GA2ox) have also low dN/ dS values.
In this framework, multiple crude-cell extracts are selectively enriched with individual pathway enzymes, which are then mixed to construct full biosynthetic pathways on the time scale of a day.
Genes encoding aflatoxin pathway enzymes are highly coexpressed.
An alteration in the expression patterns of glycolytic and TCA enzymes in developing endosperm is related to the multiple pathways and demands on central enzymes of intermediary metabolism.
There was also an absence of gateway enzymes involved in multiple pathways such as ornithine aminotransferase27.
Several RNA and DNA viruses block IFN signaling in order to inhibit multiple pathways simultaneously, such as cellular antiviral enzymes (OAS, PKR, Mx1), anti-inflammatory response (CXCL10), and death ligands (TRAIL, FAS, TNF-α; reviewed in Ref. [ 53]).
Different enzymes involved in multiple pathways linking carbon, organic acid and amino acid metabolism showed increased synthesis at different phases of the light-dark cycles suggesting a robust cellular programming in Cyanothece ATCC51142 to undergo diurnal cycles.
The predicted genes and enzymes may influence multiple pathways and can bring important influences for ND-related mechanisms, some of which may help explore the common mechanisms of NDs.
