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Scientists Find Clues Into The Evolution Of The Scorpion Venom Arsenal

by Aruna on July 4, 2009 at 9:32 AM
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Scientists Find Clues Into The Evolution Of The Scorpion Venom Arsenal

Scientists in China have unraveled the protein composition of the Scorpiops jendeki scorpion's venom.

Experts at Wuhan University claim that they are the first research team to have analyzed venom in this arachnid, and discovered nine novel poison molecules, never before seen in any scorpion species.

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Dr. Yibao Ma led the team of researchers to study the sting of S. jendeki, a member of the family Euscorpiidae, which covers Europe, Asia, Africa, and America.

"Our work greatly expands the current knowledge of scorpion venoms. We found ten known types and nine novel venom peptides and proteins. These molecules provide a rich, hitherto-unexplored resource for drug development as well as clues into the evolution of the scorpion venom arsenal," he said.
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While the S. jendeki venom has never been studied before, the researchers found that it contains ten known poisons, with markedly diverse modes of action and nine new types of venom peptide, whose biological effects are yet to be determined.

However, the scorpion itself is considered harmless, probably because it cannot deliver enough of the poison to cause any damage to a healthy human.

Interestingly, neurotoxins, which are major poisons in the venom of another scorpion species that can kill humans, were not found in the S. jendeki venom.

Ma concluded: "Many types of venom peptides and proteins have been obtained from diverse scorpion species. Some are widely distributed among scorpions from different families, while others, like some of those discovered in our study, appear to be restricted to particular scorpion lineages. The presence of these common and uncommon venom molecules among different lineages reflects the dynamic evolutionary process of the scorpion venom arsenal".

The study has been published in the open access journal BMC Genomics.

Source: ANI
ARU
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