![A rare ω-3 fatty acid; not readily detected in normal phospholipid PUFA pools; polyunsaturated version of docosanoic acid; inhibits [3H]-LTB4 binding to pig neutrophils at a concentration of 5 µM; inhibits mammalian DNA polymerases and human topoisomerases I and II](https://interpriseusa.com/wp-content/uploads/2021/06/90170.png)
Docosatrienoic acid is a rare ω-3 fatty acid not readily detected in normal phospholipid PUFA pools. It is a polyunsaturated version of the fatty acid docosanoic acid (Item No. 9000338). Docosatrienoic acid inhibits [3H]-LTB4 binding to pig neutrophils at a concentration of 5 µM.{2361} It also dose-dependently inhibits the activity of mammalian DNA polymerases and human topoisomerases I and II, potentially by binding directly to the hydrophobic region of the enzymes.{39264} The cis configuration of the double bonds is important for this activity, and the carboxyl group is required as the methyl ester version has no activity at these enzymes.
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A rare ω-3 fatty acid; not readily detected in normal phospholipid PUFA pools; polyunsaturated version of docosanoic acid; inhibits [3H]-LTB4 binding to pig neutrophils at a concentration of 5 µM; inhibits mammalian DNA polymerases and human topoisomerases I and II,
Formal name: 13Z,16Z,19Z-docosatrienoic acid
Synonyms: cis-13,16,19-Docosatrienoic Acid
Molecular weight: 334.5
CAS: 28845-86-5
Purity: ≥98%
Formulation: A solution in ethanol
The tetracycline repressor (TetR) is a transcriptional regulator which normally binds tightly to its palindromic tetO operator DNA, blocking gene expression.{17508} Tet causes the repressor to dissociate from the DNA, allowing transcription to occur. A novel reverse TetR (revTetR) requires tetracycline as a co-repressor to bind tetO and block transcription.{17509,17510} Anhydrotetracycline (hydrochloride) is a powerful effector in both the tetracycline repressor (TetR) and reverse TetR (revTetR) systems, binding the Tet repressor 35-fold more strongly than Tet.{17508,17511} Moreover, anhydrotetracycline poorly binds the 30S ribosomal subunit, compared to Tet,{17512} so it does not act as a general inhibitor of translation and is a poor antibiotic. Perhaps related to this, the concentration of anhydrotetracycline that inhibits eukaryotic cell growth is more than a 1,000-fold above the dose that alters transcription through TetR.{17508}
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The tetracycline repressor (TetR) is a transcriptional regulator which normally binds tightly to its palindromic tetO operator DNA, blocking gene expression.{17508} Tet causes the repressor to dissociate from the DNA, allowing transcription to occur. A novel reverse TetR (revTetR) requires tetracycline as a co-repressor to bind tetO and block transcription.{17509,17510} Anhydrotetracycline (hydrochloride) is a powerful effector in both the tetracycline repressor (TetR) and reverse TetR (revTetR) systems, binding the Tet repressor 35-fold more strongly than Tet.{17508,17511} Moreover, anhydrotetracycline poorly binds the 30S ribosomal subunit, compared to Tet,{17512} so it does not act as a general inhibitor of translation and is a poor antibiotic. Perhaps related to this, the concentration of anhydrotetracycline that inhibits eukaryotic cell growth is more than a 1,000-fold above the dose that alters transcription through TetR.{17508}
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The PtdIn phosphates play an important role in the generation and transduction of intracellular signals.{8344,4096,14518} PtdIns-(3,4,5)-P3-biotin is an affinity probe which allows the PIP3 to be detected through an interaction with the biotin ligand. This design allows PtdIns-(3,4,5)-P3-biotin to serve as a general probe for any protein with a high affinity binding interaction with inositol-(3,4,5)-triphosphate phospholipids, such as phosphatidylinositol 3-kinase, PTEN, or PH-domain-containing proteins.
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Cyclin-dependent kinases (CDKs) are key regulators of cell cycle progression and are therefore promising targets for cancer therapy. (R)-Roscovitine is a potent inhibitor of Cdk2/cyclin E with an IC50 value of 0.1 µM.{14988} It also inhibits Cdk7/cyclin H, Cdk5/p35, and cell division cycle (cdc)/cyclin B with IC50 values of 0.49, 0.16, and 0.65 µM, respectively.{14987,14988,14991} (R)-Roscovitine inhibits the growth of rapidly proliferating cells with an average IC50 value of 15.2 µM against a panel of 19 human tumor cell lines.{14988} In murine models of polycystic kidney disease, (R)-roscovitine effectively inhibited disease progression at doses of 50-100 mg/kg.{14564}
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