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1,773 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 ...

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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 ...

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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 ...

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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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Regulation of IGFBP-2 expression during fasting

19-Feb-2015 | Kang H; Kim M; Kim S; Lee J; Kim Y; Seo Y; Bae J; Oh G; Song D; Ahn Y; Im S, Biochemical Journal, 2015

Insulin-like growth factor (IGF)-binding protein-2 (IGFBP-2), one of the most abundant circulating IGFBPs, is known to attenuate the biological action of IGF-1. Although the effect of IGFBP-2 in preventing metabolic disorder is well known, its regulatory mechanism remains unclear. Here, we ...

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JAK2 activation by growth hormone and other cytokines

15-Feb-2015 | Waters MJ; Brooks AJ, Biochemical Journal, 2015

Growth hormone (GH) and structurally related cytokines regulate a great number of physiological and pathological processes. They do this by coupling their single transmembrane domain (TMD) receptors to cytoplasmic tyrosine kinases, either as homodimers or heterodimers. Recent studies have ...

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Conserved Proline-Directed Phosphorylation Regulates SR Protein Conformation and Splicing Function

22-Dec-2014 | Keshwani M; Aubol B; Fattet L; Ma C; Qiu J; Jennings P; Fu X; Adams J, Biochemical Journal, 2014

The alternative splicing of human genes is dependent on SR proteins, a family of essential splicing factors whose name derives from a signature C-terminal domain rich in arginine-serine dipeptide repeats (RS domains). Although the SRPKs (SR-specific protein kinases) phosphorylate these repeats, ...

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The insulinotropic effect of insulin-like peptide 5 {Less than}i{Greater than}in vitro{Less than}/i{Greater than} and {Less than}i{Greater than}in vivo{Less than}/i{Greater than}

17-Dec-2014 | Luo X; Li T; Zhu Y; Dai Y; Zhao J; Guo Z; Wang M, Biochemical Journal, 2014

Insulin-like peptide 5 (INSL5), a member of the insulin/relaxin superfamily, can activate the G-protein coupled receptor RXFP4, but its precise biological functions are largely unknown. Recent studies suggest that the INSL5/RXFP4 is involved in the control of food intake and glucose homeostasis. ...

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The solution structure of the MANEC-type domain from Hepatocyte Growth Factor Activator Inhibitor 1 reveals an unexpected PAN/apple domain-type fold.

16-Dec-2014 | Hong Z; Nowakowski M; Spronk C; Petersen S; Andreasen P; Ko{z}mi{n}ski W; Mulder F; Jensen J, Biochemical Journal, 2014

A decade ago, a Motif at N-terminus with Eight-Cysteines or in short MANEC was defined as a new protein domain family. This domain is found exclusively in the N-terminus of >400 multi-domain type-1 transmembrane proteins from animals. Despite the large number of MANEC-containing proteins, only ...

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FoxO1 negatively regulates leptin-induced POMC transcription through its direct interaction with STAT3

16-Dec-2014 | Ma W; Fuentes G; Shi X; Verma C; Radda G; Han W, Biochemical Journal, 2014

FoxO1, which is upregulated during early stages of diet-induced leptin resistance, directly interacts with STAT3 and prevents STAT3 from binding to SP1-POMC promoter complex, and thereby inhibits STAT3-mediated regulation of POMC transcription. FoxO1 also binds directly to the POMC promoter and ...

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