Can anyone name some animal/plant toxins that act as enzymes?

Question

Also can someone desribe their chemical function as an enzyme or give me a link to info about that and also the toxin in general......

Answer 1

Ricin A, extracted from Castor beans is a toxin that is an N-glycoside hydrolase that specifically removes an adenine base from ribosomal RNA, resulting in an inhibition of protein synthesis.

Belladonna contains plant alkaloids which inhibit acetylcholine but might not be strictly considered an enzyme.

Cardiac glycosides from foxglove and various frog and toad derived poisons block the sodium/potassium ATPase pump

Snake venoms are varied in their toxins and most of these are enzymes:
The chemistry of snake venom

Snake venom is a mixture of toxins and different enzymes used for other purposes like increasing the prey's uptake of toxins.

* Phosphodiesterases are used to interfere with the prey's cardiac system, mainly to lower the blood pressure.
* Snake venom inhibits cholinesterase to make the prey lose control of its muscles.
* Hyaluronidase increases tissue permeability to increase the rate that other enzymes are absorbed into the prey's tissues.
* Amino acid oxidases and proteases are used for digestion. Amino acid oxidase also triggers some other enzymes and is responsible for the yellow color of the venom of some species.
* Snake venom often contains ATPases which are used for breaking down ATP to disrupt the prey's energy fuel use.