Tuesday, August 13, 2013

Macromolecular juggling by ubiquitylation enzymes

Sonja Lorenz, Aaron J Cantor, Michael Rape and John Kuriyan

Abstract
The posttranslational modification of target  proteins with ubiquitin and ubiquitin-like proteins  is accomplished by the sequential action of E1, E2, and E3 enzymes. Members of the E1 and E3 enzyme  families can undergo particularly large conformational  changes during their catalytic cycles, involving the  remodeling of domain interfaces. This enables the  efficient, directed and regulated handover of ubiquitin  from one carrier to the next one. We review some of
these conformational transformations, as revealed by crystallographic studies.

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