βTrCP1 promotes SLC35F2 protein ubiquitination and inhibits cancer progression in HeLa cells

초록

The solute carrier family 35 F2 (SLC35F2) belongs to membrane-bound carrier proteins that are associated with multiple cancers. The main factor that determines cancer progression is the expression level of SLC35F2. Thus, identifying the E3 ligase that controls SLC35F2 protein abundance in cancer cells is critical. Here, we identified STrCP1 interacting with and reducing the SLC35F2 protein level. STrCP1 signals SLC35F2 protein ubiquitination and reduces SLC35F2 protein half-life. The mRNA expression pattern between STrCP1 and SLC35F2 across a panel of cancer cell lines showed a negative correlation. Additionally, the depletion of STrCP1 accumulated SLC35F2 protein and promoted SLC35F2-mediated cell growth, migration, invasion, and colony formation ability in HeLa cells. Overall, we demonstrate that STrCP1 acts as a tumor suppressor by controlling SLC35F2 protein abundance in cancer cells. The depletion of STrCP1 promotes SLC35F2-mediated carcinogenesis. Thus, we envision that STrCP1 may be a potential target for cancer therapeutics.

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