p-Nitrobenzyl mesylate (PNBM) is a reagent that is used to alkylate thiophosphates, forming thiophosphate ester epitopes that can be recognized by specific antibodies.{34226} Substrates phosphorylated with adenosine 5′-(γ-thio)-triphosphate (ATPγS; Item No. 14957) or N6-benzyl-ATPγS can be alkylated by PNBM.{34227,34228} The tagged substrates can be isolated by immunoprecipitation or immunoaffinity purification, or they can be detected by immunoblotting.
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A reagent that is used to alkylate thiophosphates
Formal name: 4-nitro-benzenemethanol, 1-methanesulfonate
Synonyms: para-Nitrobenzyl mesylate|4-Nitrobenzyl mesylate|PNBM
Molecular weight: 231.2
CAS: 39628-94-9
Purity: ≥99%
Formulation: A solid
Application|Immunoprecipitation||Application|Western Blot||Product Type|Biochemicals||Research Area
The nuclear factor-κB (NF-κB) regulates the expression of numerous genes involved in immunity and inflammation, cellular stress responses, growth, and apoptosis. Resveratrol, a polyphenolic trans-stilbene, is a known inhibitor of the activation of NF-κB and exhibits activity against a wide variety of cancer cells. CAY10512 is a substituted trans-stilbene analog of resveratrol that is 100-fold more potent as measured by antioxidant activity. The IC50 value for inhibition of TNFα-induced activation of NF-κB by CAY10512 is 0.15 µM compared to 20 µM by resveratrol.{14545}
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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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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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