The characteristics and roles of β-TrCP1/2 in carcinogenesis

Area of Science:

• Molecular Biology
• Cell Biology
• Oncology

Background:

• β-transducin repeat-containing protein (β-TrCP) is an F-box protein acting as a substrate receptor in the SCFβ-TrCP E3 ubiquitin ligase complex.
• β-TrCP regulates critical physiological and pathological processes, including cell cycle, DNA damage response, and tumorigenesis, by controlling protein degradation.

Purpose of the Study:

• To review the characteristics of β-TrCP1, β-TrCP2, and the SCFβ-TrCP ubiquitin ligase.
• To discuss the biological processes regulated by SCFβ-TrCP through substrate degradation.
• To summarize the multi-layered regulation of β-TrCP1 and β-TrCP2 and their roles in human cancers.

Main Methods:

• Literature review of β-TrCP function, regulation, and roles in cancer.
• Analysis of β-TrCP's involvement in ubiquitination and proteasomal degradation pathways.
• Synthesis of current knowledge on β-TrCP as an oncoprotein or tumor suppressor.

Main Results:

• β-TrCP ligase complex targets key regulators for ubiquitination and proteasomal degradation.
• Dysregulation of β-TrCP is frequently observed in human cancers, highlighting its role in carcinogenesis.
• β-TrCP1 and β-TrCP2 function context-dependently as either oncoproteins or tumor suppressors.

Conclusions:

• β-TrCP plays a pivotal role in human cancer development and progression.
• Understanding β-TrCP regulation and function provides insights into cancer biology.
• Targeting β-TrCP1 and β-TrCP2 presents a promising avenue for developing new cancer therapeutics.