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Key difference in how TB bacteria degrade doomed proteins
Date:10/17/2010

ker sequence as well as structures of the marker sequence as it binds with the proteasome.

Based on the structures, the scientists describe a detailed mechanism by which coiled, tentacle-like arms protruding from the proteasome identify the death sentence label, causing a series of protein-folding maneuvers that pull the doomed protein into the degradation chamber.

Importantly, this interaction between the bacterial proteasome and the marker sequence is unique to bacteria. Human cells use a different marker protein and a completely different mechanism for drawing doomed proteins into the proteasome. Thus the details of proteasome-substrate interaction revealed by the current study may provide highly specific targets for the development of new anti-tuberculosis therapies.


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Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory
Source:Eurekalert

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