Question

May an enzyme have a second function at a different temperature ?

Answer 1

No...All Enzymes are assigned a specific duty to perform... Temperature difference will not change its function.. It only affects its efficiency.. If d temp. Is high.. The enzymes get destroyed& if d temp.is low. The enzymes slow down.... Thus an optimum temperature of 37°C shud b maintained fr proper functioning of enzymes...

Answer 2

Got it @BuFu ????

Answer 3

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Answer 4

Not all enzymes have an optimum temperature of 37°C :P Only the ones in humans or other organisms with a body temp of 37°C. But ashley is right, 1 enzyme catalyses 1 specific reaction. Temperature won't change that.

Answer 5

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Answer 6

I like this thread. I know of no enzymes which catalyse two different reactions at two different temperatures. Though the idea is so intriguing that I might put it on the list of things I should try to get a grant for a find!

Thomaster is absolutely right: there are some proteins for which optimal temperatures are not 37 degrees C. For an interesting case I refer you to some species of bats who hibernate in colder climates - in these species many (but not all) enzymes come in pairs (so two slightly different copies of the same protein, one which is most efficient at a 'summer' temperature and the other most efficient at a 'winter' temperature) - and comparing the subtle structural, enthalpic and entropic differences between the two are fascinating! I think, anyway. :)

Answer 7

multi-functional enzymes do exist, but I am not sure if their functions are dictated by temperature. An example of this enzyme is Cysteine cathepsins.

Answer 8

To me, although I dont know of any--I wouldn't be particularly surprised if someone showed evidence of enzymatic functions changing due to temperature. As we all know, the function is defined by its morphology, and temp is one of the things that can alter morphology, and thus could give the enzyme a different function--but like I said, I dont know of any case where this has been documented.

Answer 9

Thanks for all this answers, it seems that I asked a interesting question ! For me I think it's rather other factors that can affect enzyme function, such as pH. About temperature, I didn't found any scientific articles about it

Answer 10

This may help you: http://is.gd/weyumy