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86 Newest Publications of Portland Press

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Deletion of phospholipase A{Less than}sub{Greater than}2{Less than}/sub{Greater than} group IV c induces apoptosis in rat mammary tumor cells by the nuclear factor-{kappa}B/lipocalin 2 pathway

27-May-2015 | Nanashima N; Yamada T; Shimizu T; Tsuchida S, Biochemical Journal, 2015

Although some phospholipase A2 forms, the initiator of the arachidonic acid cascade, contribute to carcinogenesis in many organs, the contribution of phospholipase A2 group IVc (Pla2g4c) remains to be clarified and the function of the enzyme in cancer development are unknown. The Hirosaki ...

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Depletion of the Polyamines Spermidine and Spermine by Overexpression of Spermidine/spermine N{Less than}sup{Greater than}1{Less than}/sup{Greater than}-Acetyltransferase1 (SAT1) Leads to Mitochondria-Mediated Apoptosis in Mammalian Cells

07-Apr-2015 | Mandal S; Mandal A; Park M, Biochemical Journal, 2015

The polyamines putrescine, spermidineand spermine are intimately involved in the regulation of cellular growth and viability. Transduction of HEK293T cells with an adenovirus (AdSAT1) encoding a key polyamine catabolic enzyme, spermidine/spermine N1-acetyltransferase1 (SAT1), leads to a rapid ...

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Processing of Protein ADP-ribosylation by Nudix Hydrolases

19-Mar-2015 | Palazzo L; Thomas B; Jemth A; Colby T; Leidecker O; Feijs K; Zaja R; Loseva O; Puigvert J; Matic I; Helleday T; Ahel I, Biochemical Journal, 2015

ADP-ribosylation is a post-translational modification of proteins found in organisms from all kingdoms of life which regulates many important biological functions including DNA repair, chromatin structure, unfolded protein response, and apoptosis. Several cellular enzymes, such as macrodomain ...

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Assembly and structure of Lys33-linked polyubiquitin reveals distinct conformations

27-Feb-2015 | Kristariyanto Y; Choi S; Abdul Rehman S; Ritorto M; Campbell D; Morrice N; Toth R; Kulathu Y, Biochemical Journal, 2015

Ubiquitylation regulates a multitude of biological processes and this versatility stems from the ability of ubiquitin to form topologically different polymers of eight different linkage types. While some linkages have been studied in detail, other linkage types including Lys33-linked ...

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Distinct lipid effects on tBid and Bim activation of membrane permeabilization by pro-apoptotic Bax

25-Feb-2015 | Shamas-Din A; Bindner S; Chi X; Leber B; Andrews D; Fradin C, Biochemical Journal, 2015

After exposure to stressful stimuli, apoptotic signals can be relayed to mitochondria by pro-apoptotic activator proteins, tBid and Bim, which activate Bax and or Bak to induce mitochondrial outer membrane permeabilization (MOMP). These protein-protein and protein-membrane interactions are ...

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Small Molecule Inhibitors of ERK-mediated Immediate Early Gene Expression and Proliferation of Melanoma Cells Expressing Mutated BRaf

19-Feb-2015 | Samadani R; Zhang J; Brophy A; Oashi T; Priyakumar U; Raman E; St. John F; Jung K; Fletcher S; Pozharski E; MacKerel ..., Biochemical Journal, 2015

Constitutive activation of the extracellular signal-regulated kinases 1 and 2 (ERK1/2) are central to regulating the proliferation and survival of many cancer cells. The current inhibitors of ERK1/2 target ATP binding or the catalytic site and are therefore limited in their utility for ...

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Ubiquitination profiling identifies sensitivity factors for IAP antagonist treatment

21-Nov-2014 | Varfolomeev E; Izrael-Tomasevic A; Yu K; Bustos D; Goncharov T; Belmont L; Masselot A; Bakalarski C; Kirkpatrick D; ..., Biochemical Journal, 2014

Evasion of cell death is one crucial capability acquired by tumor cells to ward off anti-tumor therapies, and represents a fundamental challenge to sustaining clinical efficacy for currently available agents. Inhibitor of Apoptosis (IAP) proteins use their ubiquitin E3 ligase activity to promote ...

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C/EBP homologous protein (CHOP) contributes to hepatocyte death via the promotion of ERO1{alpha} signaling in acute liver failure

11-Nov-2014 | Rao J; Zhang C; Wang P; Lu L; Qian X; Qin J; Pan X; Li G; Wang X; Zhang F, Biochemical Journal, 2014

C/EBP Homologous Protein (CHOP) has been shown to be a key molecule in endoplasmic reticulum (ER) stress-mediated apoptosis. ERO1α, a target of CHOP, is an important oxidizing enzyme to regulate ROS, which play a prominent role in hepatocellular death during acute liver failure (ALF). However, ...

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Epithelial MUC1/Muc1 Promotes Cell migration, Reduces Apoptosis and Affects Levels of Mucosal Modulators During Acetylsalicylic Acid (Aspirin) Induced Gastropathy.{Less than}i{Greater than}{Less than}/i{Greater than}

11-Nov-2014 | Banerjee D; Fernandez H; Patil P; Premaratne P; Quiding-J{a}rbrink M; Lind{e}n S, Biochemical Journal, 2014

MUC1 is a transmembrane mucin highly expressed in the stomach. While extensive research has uncovered many of its roles in cancer, knowledge about the functions of MUC1 in normal tissues is limited. Here we showed that acetylsalicylic acid (Aspirin, ASA) upregulated MUC1/Muc1 expression in the ...

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Eukaryotic elongation factor 2 kinase regulates the cold stress response by slowing translation elongation

29-Oct-2014 | Knight J; Bastide A; Roobol A; Roobol J; Jackson T; Utami W; Barrett D; Smales C; Willis A, Biochemical Journal, 2014

Cells respond to external stress conditions by controlling gene expression, a process which occurs rapidly via post-transcriptional regulation at the level of protein synthesis. Global control of translation is mediated by modification of translation factors to allow reprogramming of the ...

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