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ShareScienceDaily (Jan. 19, 2010) — A new study by a research team at Uppsala University shows how new functions can develop in an enzyme. This can explain, for example, how resistance to toxins can occur so simply. The findings are now being published in the Journal of Biological Chemistry.
Every biological being needs a large number of enzymes for the many functions of cells. In the spirit of Darwin, enzymes in an organism can change over time to meet new needs. This is done by alterations in the enzymes' building blocks that are caused by mutations in the DNA.
The new study, directed by Professor Bengt Mannervik, shows that new functions can develop in an enzyme through point mutation, that is, a single one of the enzyme's building blocks is deleted or replaced. The findings may explain how resistance to toxins can simply emerge without any major structural alterations of a gene.
"The findings are important for the development of resistance in insects to pesticides, in viruses and bacteria to drugs, and in tumors to chemotherapy," explains Bengt Mannervik.
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The above story is reprinted from materials provided by Uppsala Universitet, via AlphaGalileo.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Journal Reference:
- Shokeer et al. Minor Modifications of the C-Terminal Helix Reschedule the Favored Chemical Reactions Catalyzed by Theta Class Glutathione Transferase. Journal of Biological Chemistry, 2009; DOI: 10.1074/jbc.M109.074757
Note: If no author is given, the source is cited instead.
Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.
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