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1,717 Newest Publications of Portland Press

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Iron alters cell survival in a mitochondria-dependent pathway in ovarian cancer cells

01-Mar-2015 | Bauckman K; Haller E; Taran N; Rockfield S; Ruiz-Rivera A; Nanjundan M, Biochemical Journal, 2015

The role of iron in the development of cancer remains unclear. We previously reported that iron reduces cell survival in a Ras/mitogen-activated protein kinase (MAPK)-dependent manner in ovarian cells; however, the underlying downstream pathway leading to reduced survival was unclear. Although ...


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 ...


Defining the Cytosolic Pathway of Glutathione Degradation in {Less than}i{Greater than}Arabidopsis thaliana{Less than}/i{Greater than}: Role of the ChaC/GCG Family of {gamma}-glutamyl cyclotransferases as Glutathione Degrading Enzymes and AtLAP1 as the Cys-Gly Peptidase

26-Feb-2015 | Kumar S; Kaur A; Chattopadhyay B; Bachhawat A, Biochemical Journal, 2015

Glutathione homeostasis is critical to plant life and its adaptation to stress. The γ-glutamyl cycle of glutathione biosynthesis and degradation plays a pre-eminent role in glutathione homeostasis. The genes encoding two enzymatic steps of glutathione degradation, the γ-glutamyl cyclotransferase ...


Yeast Hmt1 catalyzes asymmetric dimethylation of histone H3 arginine 2 {Less than}i{Greater than}in vitro{Less than}/i{Greater than}

26-Feb-2015 | Li H; Gong T; Zhou Z; Liu Y; Cao X; He Y; Chen C; Zhou J, Biochemical Journal, 2015

Protein arginine methyltransferases (PRMTs) are a family of enzymes that can methylate protein arginine residues. PRMTs’ substrates include histones and a variety of non-histone proteins. Previous studies have shown that yeast Hmt1 is a type I PRMT, and methylates histone H4 arginine 3 and ...


Notch ligand Delta-like1: X-ray crystal structure and binding affinity

26-Feb-2015 | Kershaw N; Church N; Griffin M; Luo C; Adams T; Burgess A, Biochemical Journal, 2015

The Notch pathway is a fundamental signalling system in most multicellular animals. We have determined the X-ray crystal structure of the extracellular domain of the Notch ligand Delta-like ligand-1 (Dll-1). This is the first structure of a Delta-like ligand. The structure incorporates the ...


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 ...


PAQR3 modulates H3K4 trimethylation by spatial modulation of the regulatory subunits of COMPASS-like complexes in mammalian cells

23-Feb-2015 | Liu C; Zhang Y; Hou Y; Shen L; Li Y; Guo W; Xu D; Liu G; Zhao Z; Man K; Pan Y; Wang Z; Chen Y, Biochemical Journal, 2015

Histone modification plays important roles in many biological processes such as development and carcinogenesis. Methylation of histone H3 lysine 4 (H3K4) is commonly associated with transcriptional activation of genes. H3K4 methylation in mammalian cells is carried out by COMPASS-like complexes ...


Structural Mechanisms Underlying Sequence-Dependent Variations in GAG Affinities of Decorin Binding Protein A, a {Less than}i{Greater than}Borrelia burgdorferi{Less than}/i{Greater than} Adhesin

19-Feb-2015 | Morgan A; Wang X, Biochemical Journal, 2015

Decorin binding protein A (DBPA) is an important surface adhesin of the bacterium Borrelia burgdorferi, the causative agent of Lyme disease. DBPA facilitates the bacteria’s colonization of human tissue by adhering to glycosaminoglycan (GAG), a sulfated polysaccharide. Interestingly, DBPA sequence ...


PT-1 selectively activates AMPK-{gamma}1 complexes in mouse skeletal muscle, but activates all three {gamma} subunit complexes in cultured human cells by inhibiting the respiratory chain

19-Feb-2015 | Jensen T; Ross F; Kleinert M; Sylow L; Knudsen J; Gowans G; Hardie D; Richter E, Biochemical Journal, 2015

AMP-activated protein kinase (AMPK) occurs as heterotrimeric complexes in which a catalytic subunit (α1/α2) is bound to one of two b subunits (β1/β2) and one of three γ subunits (γ1/γ2/γ3). The ability to selectively activate specific isoforms would be a useful research tool, and a promising ...


The {Less than}i{Greater than}Leishmania donovani {Less than}/i{Greater than}histidine acid ecto-phosphatase{Less than}i{Greater than} Ld{Less than}/i{Greater than}MAcP: insight into its structure and function

19-Feb-2015 | Papadaki A; Politou A; Smirlis D; Kotini M; Kourou K; Papamarcaki T; Boleti H, Biochemical Journal, 2015

Acid ecto-phosphatase activity has been implicated in Leishmania donovani promastigote virulence. Here we report data contributing to the molecular/structural and functional characterization of the Leishmania donovani LdMAcP, member of the histidine acid phosphatase family. LdMAcP, is membrane ...


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