Blar i Department of Biomedicine på forfatter "Teigen, Knut"
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Characterization of the interaction of the antifungal and cytotoxic cyclic glycolipopeptide hassallidin with sterol-containing lipid membranes
Humisto, Anu; Jokela, Jouni; Teigen, Knut; Wahlsten, Matti; Permi, Perttu; Sivonen, Kaarina; Herfindal, Lars (Peer reviewed; Journal article, 2019-08-01)Hassallidins are cyclic glycolipopeptides produced by cyanobacteria and other prokaryotes. The hassallidin structure consists of a peptide ring of eight amino acids where a fatty acid chain, additional amino acids, and ... -
Conformational Sampling and Nucleotide-Dependent Transitions of the GroEL Subunit Probed by Unbiased Molecular Dynamics Simulations
Skjærven, Lars; Grant, Barry; Muga, Arturo; Teigen, Knut; McCammon, J. Andrew; Reuter, Nathalie; Martinez, Aurora (Peer reviewed; Journal article, 2011-03-10)GroEL is an ATP dependent molecular chaperone that promotes the folding of a large number of substrate proteins in E. coli. Large-scale conformational transitions occurring during the reaction cycle have been characterized ... -
Discovery and biological characterization of a novel scaffold for potent inhibitors of peripheral serotonin synthesis
Betari, Nibal; Sahlholm, Kristoffer; Ishizuka, Yuta; Teigen, Knut; Haavik, Jan (Journal article; Peer reviewed, 2020)Aim: Tryptophan hydroxylase 1 (TPH1) catalyzes serotonin synthesis in peripheral tissues. Selective TPH1 inhibitors may be useful for treating disorders related to serotonin dysregulation. Results & methodology: Screening ... -
Dominant ARL3-related retinitis pigmentosa
Holtan, Josephine Prener; Teigen, Knut; Aukrust, Ingvild; Bragadottir, Ragnheidur; Houge, Gunnar (Peer reviewed; Journal article, 2019)Purpose: To clinically and genetically characterise a second family with dominant ARL3-related retinitis pigmentosa due to a specific ARL3 missense variant, p.(Tyr90Cys). Methods: Clinical examination included optical ... -
Inhibition of Tryptophan Hydroxylases and Monoamine Oxidase-A by the Proton Pump Inhibitor, Omeprazole—In Vitro and In Vivo Investigations
Betari, Nibal; Sahlholm, Kristoffer; Morató, Xavier; Godoy-Marín, Héctor; Jáuregui, Olga; Teigen, Knut; Ciruela, Francisco; Haavik, Jan (Journal article; Peer reviewed, 2020)Serotonin (5-HT) is a hormone and neurotransmitter that modulates neural activity as well as a wide range of other physiological processes including cardiovascular function, bowel motility, and platelet aggregation. 5-HT ... -
Inhibition of VMAT2 by β2-adrenergic agonists, antagonists, and the atypical antipsychotic ziprasidone
Støve, Svein Isungset; Skjevik, Åge Aleksander; Teigen, Knut; Martinez, Aurora (Journal article; Peer reviewed, 2022)Vesicular monoamine transporter 2 (VMAT2) is responsible for packing monoamine neurotransmitters into synaptic vesicles for storage and subsequent neurotransmission. VMAT2 inhibitors are approved for symptomatic treatment ... -
Introduction of aromatic ring-containing substituents in cyclic nucleotides is associated with inhibition of toxin uptake by the hepatocyte transporters OATP 1B1 and 1B3
Herfindal, Lars; Krakstad, Camilla; Myhren, Lene Elisabeth; Hagland, Hanne; Kopperud, Reidun Kristin; Teigen, Knut; Schwede, Frank; Kleppe, Rune; Døskeland, Stein Ove (Peer reviewed; Journal article, 2014-04-16)Analogs of the cyclic nucleotides cAMP and cGMP have been extensively used to mimic or modulate cellular events mediated by protein kinase A (PKA), Exchange protein directly activated by cAMP (Epac), or protein kinase G ... -
Iodinin (1,6-dihydroxyphenazine 5,10-dioxide) from Streptosporangium sp. induces apoptosis selectively in myeloid leukemia cell lines and patient cells
Myhren, Lene Elisabeth; Nygård, Gyrid; Gausdal, Gro; Sletta, Håvard; Teigen, Knut; Degnes, Kristin Fløgstad; Zahlsen, Kolbjørn; Brunsvik, Anders; Bruserud, Øystein; Døskeland, Stein Ove; Selheim, Frode; Herfindal, Lars (Peer reviewed; Journal article, 2013-01-30)Despite recent improvement in therapy, acute myeloid leukemia (AML) is still associated with high lethality. In the presented study, we analyzed the bioactive compound iodinin (1,6-dihydroxyphenazine 5,10-dioxide) from a ... -
Mammalian CSAD and GADL1 have distinct biochemical properties and patterns of brain expression
Winge, Ingeborg; Teigen, Knut; Fossbakk, Agnete; Mahootchi, Elaheh; Kleppe, Rune; Sköldberg, Filip; Kämpe, Olle; Haavik, Jan (Peer reviewed; Journal article, 2015-11)Variants in the gene encoding the enzyme glutamic acid decarboxylase like 1 (GADL1) have been associated with response to lithium therapy. Both GADL1 and the related enzyme cysteine sulfinic acid decarboxylase (CSAD) have ... -
The N-terminal sequence of tyrosine hydroxylase is a conformationally versatile motif that binds 14-3-3 proteins and membranes
Skjevik, Åge Aleksander; Mileni, Mauro; Baumann, Anne; Halskau, Øyvind; Teigen, Knut; Raymond C., Stevens; Martinez, Aurora (Peer reviewed; Journal article, 2014-01-09)Tyrosine hydroxylase (TH) catalyzes the rate-limiting step in the synthesis of catecholamine neurotransmitters, and a reduction in TH activity is associated with several neurological diseases. Human TH is regulated, among ... -
The Regulatory Subunit of PKA-I Remains Partially Structured and Undergoes b-Aggregation upon Thermal Denaturation
Dao, Khanh K.; Pey, Angel; Gjerde, Anja Underhaug; Teigen, Knut; Byeon, In-Ja L.; Døskeland, Stein Ove; Gronenborn, Angela M.; Martinez, Aurora (Peer reviewed; Journal article, 2011-03-04)Background: The regulatory subunit (R) of cAMP-dependent protein kinase (PKA) is a modular flexible protein that responds with large conformational changes to the binding of the effector cAMP. Considering its highly dynamic ... -
Structural mechanism for tyrosine hydroxylase inhibition by dopamine and reactivation by Ser40 phosphorylation
Bueno-Carrasco, María Teresa; Cuellar, Jorge; Flydal, Marte Innselset; Santiago, Cesar; Kråkenes, Trond-André; Kleppe, Rune; Jose R, Lopez-Blanco; Marcilla, Miguel; Teigen, Knut; Alvira, Sara; Chacón, Pablo; Martinez, Aurora; Valpuesta, José M (Journal article; Peer reviewed, 2022)Tyrosine hydroxylase (TH) catalyzes the rate-limiting step in the biosynthesis of dopamine (DA) and other catecholamines, and its dysfunction leads to DA deficiency and parkinsonisms. Inhibition by catecholamines and ... -
Synthetic corticosteroids as tryptophan hydroxylase stabilizers
Betari, Nibal; Teigen, Knut; Sahlholm, Kristoffer; Haavik, Jan (Journal article; Peer reviewed, 2021)Background: Clinically, corticosteroids are used mainly for their immune-modulatory properties but are also known to influence mood. Despite evidence of a role in regulating tryptophan hydroxylases (TPH), key enzymes in ...