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Artículos de revistas sobre el tema "Biosynthèse in vitro"

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Publicado: 25 de mayo de 2024

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1

Roussel, J. P. "Implication des 3-déhydroecdystéroïdes dans la voie de biosynthèse de l'ecdysone chezLocusta migratoria, in vitro." Archives Internationales de Physiologie, de Biochimie et de Biophysique 100, no. 1 (1992): 45–53. http://dx.doi.org/10.3109/13813459209035258.

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2

Arnould, J. M. "Mise en évidence in vitro de la biosynthèse d'histamine à partir de carnosine par le rein de souris gravide." Canadian Journal of Physiology and Pharmacology 65, no. 1 (1987): 70–74. http://dx.doi.org/10.1139/y87-013.

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Kidneys of pregnant mice synthesize histamine when incubated in the presence of carnosine, manganese, and pyridoxal phosphate. Intensity of biosynthesis increases linearly with the amount of enzyme and the incubation time. The reaction can only be catalysed by two enzymes that are located in kidneys and act in succession: carnosinase, which hydrolyzes carnosine into its two moieties, and histidine decarboxylase, which transforms histidine, a product of carnosine degradation, into histamine. The biosynthesis of histamine from carnosine seems to increase with the progress of pregnancy. In nonpre
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3

De Angelis, Francesco, Rosario Nicoletti, Nicoletta Spreti, and Franca Verì. "Ein neues In-vitro-Modell der Lignin-Biosynthese." Angewandte Chemie 111, no. 9 (1999): 1364–67. http://dx.doi.org/10.1002/(sici)1521-3757(19990503)111:9<1364::aid-ange1364>3.0.co;2-y.

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4

Wagner, Hildebert, Michael Wierer, and Rudolf Bauer. "In vitro-Hemmung der Prostaglandin-Biosynthese durch etherische Öle und phenolische Verbindungen." Planta Medica 52, no. 03 (1986): 184–87. http://dx.doi.org/10.1055/s-2007-969117.

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5

Fischer, S., R. Lorenz, P. C. Weber, and C. v. Schacky. "N-3 Fettsäuren, Eikosanoide und zelluläre Funktionen." Hämostaseologie 07, no. 05 (1987): 101–8. http://dx.doi.org/10.1055/s-0038-1660538.

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ZusammenfassungIn geeigneten In-vitro-Modellen und beim Menschen verändern n-3 Fettsäuren das Eikosanoidsystem qualitativ und quantitativ in eine günstige Richtung. Zusätzlich zur unverminderten Bildung der stark vasodilatatorisch und antiaggregatorisch wirksamen Substanz PGI2 erscheint in größeren Mengen das biologisch beinahe ebenso wirksame PGI3. Die Biosynthese des physiologischen Gegenspielers von PGI, der starke Aggregator und Vasokonstriktor TXA2, wird gesenkt, in kleinen Mengen wird auch ein biologisch nicht oder nur gering wirksames TXA3 gebildet. EPA wird im Menschen in den Neutrophi
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6

Teramura, Misato, Jiro Harada, and Hitoshi Tamiaki. "In vitro enzymatic assays of photosynthetic bacterial 3-vinyl hydratases for bacteriochlorophyll biosyntheses." Photosynthesis Research 135, no. 1-3 (2017): 319–28. http://dx.doi.org/10.1007/s11120-017-0415-6.

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7

Reichling, Jürgen, and Rainer Stange. "Antivirale und viruzide Eigenschaften von ätherischen Ölen und ihren isolierten Verbindungen – Stand der präklinischen Forschung." Zeitschrift für Komplementärmedizin 16, no. 01 (2024): 16–25. http://dx.doi.org/10.1055/a-2239-4034.

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SummaryÄtherische Öle (ÄÖ) als Vielstoffgemische sowie einzelne chemisch charakterisierte Ätherisch-Öl-Verbindungen (ÄÖV) haben zahlreiche pharmakologische Wirkungen, wie antibakterielle, antimykotische, antivirale, entzündungshemmende, immunmodulatorische, antioxidative und wundheilungsfördernde. Auf der Grundlage ausgewählter wissenschaftlicher Arbeiten befasst sich die vorliegende Übersicht mit den potenziellen antiviralen und viruziden Aktivitäten von ÄÖ und ÄÖV gegen behüllte und unbehüllte Viren. Neuere In-vitro- und In-vivo-Studien haben gezeigt, dass verschiedene Arznei- und Aromapflan
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8

Müller, Wolfgang M, Timo Schmiederer, Paul Ensle, and Roderich D Süssmuth. "In-vitro-Biosynthese des Typ-III-Lantibiotikums Prä-Labyrinthopeptin A2 unter C-C-Bindungsknüpfung als posttranslationaler Modifizierung." Angewandte Chemie 122, no. 13 (2010): 2486–90. http://dx.doi.org/10.1002/ange.200905909.

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9

Ida-Yonemochi, Hiroko, Kazufumi Ohshiro, Wael Swelam, Hamdy Metwaly, and Takashi Saku. "Perlecan, a Basement Membrane-type Heparan Sulfate Proteoglycan, in the Enamel Organ: Its Intraepithelial Localization in the Stellate Reticulum." Journal of Histochemistry & Cytochemistry 53, no. 6 (2005): 763–72. http://dx.doi.org/10.1369/jhc.4a6479.2005.

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The localization and biosynthesis of perlecan, a basement membrane-type heparan sulfate proteoglycan, were studied in developing tooth germs by using murine molars in neonatal and postnatal stages and primary cultured cells of the enamel organ and dental papilla to demonstrate the role of perlecan in normal odontogenesis. Perlecan was immunolocalized mainly in the intercellular spaces of the enamel organ as well as in the dental papilla/pulp or in the dental follicle. By in situ hybridization, mRNA signals for perlecan core protein were intensely demonstrated in the cytoplasm of stellate retic
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10

TSENG, Chen-Fang, Satoshi IWAKAMI, Akihiro MIKAJIRI, et al. "Inhibition of in Vitro Prostaglandin and Leukotriene Biosyntheses by Cinnamoyl-.BETA.-phenethylamine and N-Acyldopamine Derivatives." CHEMICAL & PHARMACEUTICAL BULLETIN 40, no. 2 (1992): 396–400. http://dx.doi.org/10.1248/cpb.40.396.

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11

Sou, Nga-Lai, Yu-Hsuan Huang, Der-Yuan Chen, et al. "Folinate Supplementation Ameliorates Methotrexate Induced Mitochondrial Formate Depletion In Vitro and In Vivo." International Journal of Molecular Sciences 22, no. 3 (2021): 1350. http://dx.doi.org/10.3390/ijms22031350.

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(1) Background: Antifolate methotrexate (MTX) is the most common disease-modifying antirheumatic drug (DMARD) for treating human rheumatoid arthritis (RA). The mitochondrial-produced formate is essential for folate-mediated one carbon (1C) metabolism. The impacts of MTX on formate homeostasis in unknown, and rigorously controlled kinetic studies can greatly help in this regard. (2) Methods: Combining animal model (8-week old female C57BL/6JNarl mice, n = 18), cell models, stable isotopic tracer studies with gas chromatography/mass spectrometry (GC/MS) platforms, we systematically investigated
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12

Henry, Joel, and Eve Boucaud-Camou. "In vitro stimulation by progesterone of the main nidamental glands biosyntheses in the mollusc cephalopod Sepia officinalis L." Comparative Biochemistry and Physiology Part A: Physiology 108, no. 1 (1994): 25–30. http://dx.doi.org/10.1016/0300-9629(94)90049-3.

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13

Uthoff, Stefan, Tim Stöveken, Nikolaus Weber, et al. "Thio Wax Ester Biosynthesis Utilizing the Unspecific Bifunctional Wax Ester Synthase/Acyl Coenzyme A:Diacylglycerol Acyltransferase of Acinetobacter sp. Strain ADP1." Applied and Environmental Microbiology 71, no. 2 (2005): 790–96. http://dx.doi.org/10.1128/aem.71.2.790-796.2005.

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ABSTRACT The bifunctional wax ester synthase/acyl coenzyme A (acyl-CoA):diacylglycerol acyltransferase (WS/DGAT) from Acinetobacter sp. strain ADP1 (formerly Acinetobacter calcoaceticus ADP1) mediating the biosyntheses of wax esters and triacylglycerols was used for the in vivo and in vitro biosynthesis of thio wax esters and dithio wax esters. For in vitro biosynthesis, 5′His6WS/DGAT comprising an N-terminal His6 tag was purified from the soluble protein fraction of Escherichia coli Rosetta(DE3)pLysS (pET23a::5′His6 atf). By employing SP-Sepharose high-pressure and Ni-nitrilotriacetic acid fa
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14

Araki, Yasuko, Takayoshi Awakawa, Motomichi Matsuzaki, et al. "Complete biosynthetic pathways of ascofuranone and ascochlorin inAcremonium egyptiacum." Proceedings of the National Academy of Sciences 116, no. 17 (2019): 8269–74. http://dx.doi.org/10.1073/pnas.1819254116.

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Ascofuranone (AF) and ascochlorin (AC) are meroterpenoids produced by various filamentous fungi, includingAcremonium egyptiacum(synonym:Acremonium sclerotigenum), and exhibit diverse physiological activities. In particular, AF is a promising drug candidate against African trypanosomiasis and a potential anticancer lead compound. These compounds are supposedly biosynthesized through farnesylation of orsellinic acid, but the details have not been established. In this study, we present all of the reactions and responsible genes for AF and AC biosyntheses inA. egyptiacum, identified by heterologou
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15

Vanage, G. R., M. A. Phadke, A. H. Bandivdekar, and A. R. Sheth. "Hormonal modulation of Invitro Biosynthesis of Inhibin like Peptide by Human Prostate: Hormonelle Modulation der In-vitro-Biosynthese des Inhibin-ähnlichen Peptids durch die menschliche Prostata." Andrologia 22, no. 1 (2009): 7–11. http://dx.doi.org/10.1111/j.1439-0272.1990.tb01932.x.

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16

Chiu, Hsien-Tai, Yu-Chin Lin, Meng-Na Lee, Yi-Lin Chen, Mei-Sin Wang, and Chia-Chun Lai. "Biochemical characterization and substrate specificity of the gene cluster for biosyntheses of K-252a and its analogs by in vitro heterologous expression system of Escherichia coli." Molecular BioSystems 5, no. 10 (2009): 1192. http://dx.doi.org/10.1039/b912395b.

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17

Yu, Yue, та Wilfred A. van der Donk. "Biosynthesis of 3-thia-α-amino acids on a carrier peptide". Proceedings of the National Academy of Sciences 119, № 29 (2022). http://dx.doi.org/10.1073/pnas.2205285119.

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A subset of natural products, such as polyketides and nonribosomal peptides, is biosynthesized while tethered to a carrier peptide via a thioester linkage. Recently, we reported that the biosyntheses of 3-thiaglutamate and ammosamide, single amino acid–derived natural products, employ a very different type of carrier peptide to which the biosynthetic intermediates are bound via an amide linkage. During their biosyntheses, a peptide aminoacyl-transfer ribonucleic acid (tRNA) ligase (PEARL) first loads an amino acid to the C terminus of the carrier peptide for subsequent modification by other en
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18

Matsuda, Kenichi, Kei Fujita, and Toshiyuki Wakimoto. "PenA, a penicillin-binding protein-type thioesterase specialized for small peptide cyclization." Journal of Industrial Microbiology and Biotechnology 48, no. 3-4 (2021). http://dx.doi.org/10.1093/jimb/kuab023.

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Abstract Penicillin-binding protein-type thioesterases (PBP-type TEs) are a recently identified group of peptide cyclases that catalyze head-to-tail macrolactamization of nonribosomal peptides. PenA, a new member of this group, is involved in the biosyntheses of cyclic pentapeptides. In this study, we demonstrated the enzymatic activity of PenA in vitro, and analyzed its substrate scope with a series of synthetic substrates. A comparison of the reaction profiles between PenA and SurE, a representative PBP-type TE, showed that PenA is more specialized for small peptide cyclization. A computatio
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19

Fu, Chengzhang, Yunkun Liu, Christine Walt, et al. "Elucidation of unusual biosynthesis and DnaN-targeting mode of action of potent anti-tuberculosis antibiotics Mycoplanecins." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-44953-5.

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AbstractDNA polymerase III sliding clamp (DnaN) was recently validated as a new anti-tuberculosis target employing griselimycins. Three (2 S,4 R)−4-methylproline moieties of methylgriselimycin play significant roles in target binding and metabolic stability. Here, we identify the mycoplanecin biosynthetic gene cluster by genome mining using bait genes from the 4-methylproline pathway. We isolate and structurally elucidate four mycoplanecins comprising scarce homo-amino acids and 4-alkylprolines. Evaluating mycoplanecin E against Mycobacterium tuberculosis surprisingly reveals an excitingly low
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