Snake toxins from mamba venoms: unique tools for the physiologist

Area of Science:

• Biochemistry
• Pharmacology
• Toxicology

Background:

• Snake venoms are complex biological mixtures containing peptides and proteins.
• Many venom toxins are peptides or enzymes with diverse biological activities.
• Three-finger toxins (3FTx) are a well-characterized class of venom peptides with a conserved structure but varied targets.

Purpose of the Study:

• To summarize proteins and peptides from mamba snake venoms (Dendroaspis genus).
• To highlight their utility as experimental tools in physiology and pharmacology.

Main Methods:

• Isolation and characterization of peptides and proteins from mamba venoms.
• Review of existing literature on the biological actions of these venom components.

Main Results:

• Mamba venoms contain various peptide toxins, including three-finger toxins and Kunitz-type inhibitors.
• These peptides exhibit diverse biological actions, targeting receptors (nicotinic, muscarinic acetylcholine receptors), ion channels (K+, Ca2+), enzymes (acetylcholinesterase), and cell membranes.
• Specific examples of mamba venom peptides and their characterized targets are discussed.

Conclusions:

• Mamba snake venom peptides are valuable pharmacological tools.
• Their diverse targets and mechanisms of action provide insights into physiological processes.
• Further research on venom components can yield novel experimental probes.