J Cancer 2018; 9(18):3257-3262. doi:10.7150/jca.25930

Review

Functional roles of Speckle-Type Poz (SPOP) Protein in Genomic stability

Xi Wei1,#, Joshua Fried2,5#, Ying Li3, Linfei Hu4, Ming Gao4, Sheng Zhang1, Bo Xu 2,5,6✉

1. Department of Diagnostic and Therapeutic Ultrasonography, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
2. Department of Oncology, Southern Research Institute and Cancer Cell Biology Program, University of Alabama at Birmingham Graduate School, Birmingham, AL, 35205
3. The Third Department of Breast Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
4. Department of Thyroid and Cervical Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.
5. Cancer Cell Biology Program, University of Alabama at Birmingham Comprehensive Cancer Center Birmingham, AL 35205, USA.
6. Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, National Clinical Research Center of Cancer, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin, China
#Xi Wei and Joshua Fried contributed equally to this work.

Abstract

Understanding the functional significance of the essential elements in maintaining genomic stability provides insights into the process of tumor initiation and progression, and predicts therapeutic responses. One such element that has recently attracted significant attention is the Speckle-Type Poz Protein (SPOP), an E3 ubiquitin ligase adaptor protein. SPOP is frequently mutated or has altered expression in various cancers, including prostate, renal and endometrial. SPOP is involved in the regulation of proteasome-mediated degradation of several oncoproteins. Moreover, recent data also indicate SPOP's direct involvement in the DNA damage response. SPOP mutants induce alternations in the DNA damage repair pathway by promoting the error-prone Non-homologous end joining (NHEJ) pathway. SPOP has been linked with significant functions in cellular signaling pathways and cancer suppression. This mini-review will discuss recent findings regarding SPOP's role in genomic stability in the pathological setting.

Keywords: SPOP, genomic stability, cancer, DNA damage response

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How to cite this article:
Wei X, Fried J, Li Y, Hu L, Gao M, Zhang S, Xu B. Functional roles of Speckle-Type Poz (SPOP) Protein in Genomic stability. J Cancer 2018; 9(18):3257-3262. doi:10.7150/jca.25930. Available from http://www.jcancer.org/v09p3257.htm