NADP+ and NAD+

[klou]

I have no idea how to answer this question:

through genetic engineering, you have developed an unregulatable enzyme that can interchangeably use NAD+ or NADP+ in a redox reaction. What would be the physiological consequence(s) of having such an enzyme for an organism.

I though that it may have something to do with the regulation of the pentose phopshate pathway, but I'm really stuck.

[JackBean]

the ratio [NADP+]/[NADPH] in rat liver cells is about 0.014, whereas that of [NAD+]/[NADH] is about 700. That means, that you have favoured for oxidative break-down (NAD+) and reductive biosynthesis (NADPH).
If you had such enzyme, you would have mixed up the concentrations and all regulations diminished.

You're basically true about the pentose phosphate pathway