Targeting Protein–Protein Interactions in the Ubiquitin–Proteasome Pathway

Resultado de la investigación: Chapter

12 Citas (Scopus)


The ubiquitin–proteasome pathway (UPP) is a major venue for controlled intracellular protein degradation in Eukaryota. The machinery of several hundred proteins is involved in recognizing, tagging, transporting, and cleaving proteins, all in a highly regulated manner. Short-lived transcription factors, misfolded translation products, stress-damaged polypeptides, or worn-out long-lived proteins, all can be found among the substrates of UPP. Carefully choreographed protein–protein interactions (PPI) are involved in each step of the pathway. For many of the steps small-molecule inhibitors have been identified and often they directly or indirectly target PPI. The inhibitors may destabilize intracellular proteostasis and trigger apoptosis. So far this is the most explored option used as an anticancer strategy. Alternatively, substrate-specific polyubiquitination may be regulated for a precise intervention aimed at a particular metabolic pathway. This very attractive opportunity is moving close to clinical application. The best known drug target in UPP is the proteasome: the end point of the journey of a protein destined for degradation. The proteasome alone is a perfect object to study the mechanisms and roles of PPI on many levels. This giant protease is built from multisubunit modules and additionally utilizes a service from transient protein ligands, for example, delivering substrates. An elaborate set of PPI within the highest-order proteasome assembly is involved in substrate recognition and processing. Below we will outline PPI involved in the UPP and discuss the growing prospects for their utilization in pharmacological interventions.

Idioma originalEnglish (US)
Título de la publicación alojadaProtein-Protein Interactions in Human Disease, Part A
EditoresRossen Donev
EditorialAcademic Press Inc.
Número de páginas43
ISBN (versión impresa)9780128143445
EstadoPublished - 2018

Serie de la publicación

NombreAdvances in Protein Chemistry and Structural Biology
ISSN (versión impresa)1876-1623
ISSN (versión digital)1876-1631

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry


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