Searching for enzyme using NAD(P)H and ADP ---> NAD(P)+ and ATP

[D. Bovee]

I have been researching this topic, without much luck.  I am searching
for a *single* enzyme which catalyzes a reaction ultimately converting
ADP to ATP (presumably using NAD(P)H.  I suspected I might find a
dehydrogenase to do this trick...but I haven't had any luck as of yet.

One of the biosynthetic reactions employs TWO enzymes to do this:
glutamine synthetase and glutamine synthase are used in conjunction
whose net reaction makes my products from these reactants.  However,
for the experiment I am setting up, I need to minimize this reaction
to a single enzyme...

If you have any ideas, or know of such a system, your help would be
greatly appreciated!  Please copy any replies to email, if possible.

					------
					David Bovee
					Dept. of Chemistry
					University of Denver