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Updated: Aug 6, 2026

Assaying Proteasomal Degradation in a Cell-free System in Plants
Published on: March 27, 2014
Molecular evolution of proteasomes
1SmithKline Beecham Pharmaceuticals, UP 1345, 1250 South Collegeville Road, Collegeville, PA 19426-0989, USA.
Abstract:
Proteasomes are large, multisubunit proteases that are found, in one form or another, in all domains of life and play a critical role in intracellular protein degradation. Although they have substantial structural similarity, the proteasomes of bacteria, archaea, and eukaryotes show many differences in architecture and subunit composition. This article discusses possible paths by which proteasomes may have evolved from simple precursors to the highly complicated and diverse complexes observed today.
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