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The role of cullin proteins in gastric cancer
1Department of General Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Tong-Dao-Bei Street, Hohhot, Inner Mongolia, 010050, People's Republic of China.
Abstract:
The cullin proteins are a family of scaffolding proteins that associate with RING proteins and ubiquitin E3 ligases and mediate substrate-receptor bindings. Thus, cullin proteins regulate the specificity of ubiquitin targeting in the regulation of proteins involved in various cellular processes, including proliferation, differentiation, and apoptosis. There are seven cullin proteins that have been identified in eukaryotes: CUL1, CUL2, CUL3, CUL4A, CUL4B, CUL5, and CUL7/p53-associated parkin-like cytoplasmic protein. All of these proteins contain a conserved cullin homology domain that binds to RING box proteins. Cullin-RING ubiquitin ligase complexes are activated upon post-translational modification by neural precursor cell-expressed, developmentally downregulated protein 8. The aberrant expression of several cullin proteins has been implicated in many cancers though the significance in gastric cancer has been less well investigated. This review provides the first systematic discussion of the associations between all members of the cullin protein family and gastric cancer. Functional and regulatory mechanisms of cullin proteins in gastric carcinoma progression are also summarized along with a discussion concerning future research areas. Accumulating evidence suggests a critical role of cullin proteins in tumorigenesis, and a better understanding of the function of these individual cullin proteins and their targets will help identify potential biomarkers and therapeutic targets.
Insights
Cullin proteins regulate cellular processes and are implicated in cancer. This review systematically discusses cullin proteins
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Background:
- Cullin proteins are scaffolding proteins that, with RING proteins, form E3 ubiquitin ligases, mediating substrate binding and regulating protein degradation.
- These proteins are crucial for cellular processes like proliferation, differentiation, and apoptosis.
- Seven cullin proteins (CUL1-CUL7) exist in eukaryotes, all possessing a conserved cullin homology domain for RING box protein interaction.
Purpose of the Study:
- To systematically review the association of all cullin protein family members with gastric cancer.
- To summarize the functional and regulatory mechanisms of cullin proteins in gastric carcinoma progression.
- To identify future research directions for cullin proteins in gastric cancer.
Main Methods:
- Systematic literature review and discussion.
- Analysis of existing evidence on cullin protein function and regulation.
- Synthesis of data regarding cullin protein involvement in gastric cancer.
Main Results:
- Aberrant expression of several cullin proteins is linked to various cancers.
- The role of cullin proteins in gastric cancer is less investigated compared to other cancers.
- Evidence suggests a critical role for cullin proteins in tumorigenesis.
Conclusions:
- Cullin proteins play a significant role in gastric cancer progression.
- Understanding individual cullin protein functions and targets is vital for identifying biomarkers and therapeutic strategies.
- Further research is needed to fully elucidate the involvement of cullin proteins in gastric cancer.
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