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- W2044203982 abstract "Many features of deadly human cervical cancers (HCCs) still require elucidation. Among HCC-derived cell lines, here we used the C4-I one since its quantitative gene expression pattern most closely mimics invasive HCCs, including protein kinase-Cζ (PKCζ) overexpression. Via proteomic, bioinformatic, and biochemical approaches we identified 31 and 33 proteins co-immunoprecipitating with PKCζ from nuclear membranes (NMs) of, respectively, untreated or VP-16-exposed C4-I cells. Such proteins belonged to eight functional groups, whose compositions and relative sizes changed with either context. Of the 56 proteins identified, only eight were shared between the two subproteomes, including Bcl10. Surprisingly, proteins known to associate with Bcl10, like Carma1/3 and Malt1, in so-called CBM signalosomes were absent. Notably, in VP-16-treated C4-I cells, PKCζ•Bcl10 complexes increasingly accrued at NMs, where PKCζ phosphorylated Bcl10, as PKCζ also did in vitro and in cell-free systems, both processes being thwarted by interfering RNA (iRNA) PKCζ depletion. Caspase-3 was associated with PKCζ•Bcl10 complexes and proteolyzed PKCζ leading to its inactivation/destruction; both events were prevented by Bcl10 iRNA suppression. Thus, PKCζ’s molecular interactions and functional roles changed strikingly according to the untreated or apoptogen-treated cells context, and by complexing with Bcl10, PKCζ surprisingly favored its own demise, which suggests both proteins as HCCs therapeutic targets." @default.
- W2044203982 created "2016-06-24" @default.
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- W2044203982 creator A5052407008 @default.
- W2044203982 creator A5061275176 @default.
- W2044203982 creator A5075951952 @default.
- W2044203982 date "2012-07-19" @default.
- W2044203982 modified "2023-09-27" @default.
- W2044203982 title "Role-Shifting PKCζ Fosters Its Own Proapoptotic Destruction by Complexing with Bcl10 at the Nuclear Envelope of Human Cervical Carcinoma Cells: A Proteomic and Biochemical Study" @default.
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- W2044203982 doi "https://doi.org/10.1021/pr3000464" @default.
- W2044203982 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22812606" @default.
- W2044203982 hasPublicationYear "2012" @default.
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