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Chemical Structure| 120-72-9 Chemical Structure| 120-72-9
Chemical Structure| 120-72-9

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CAS No.: 120-72-9

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Indole is an endogenous metabolite.

4.5 *For Research Use Only !

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Anushree Mondal ; Pronay Roy ; Jaclyn Carrannatto ; Prathamesh M. Datar ; Daniel J. DiRocco ; Katherine Huntera and E. Neil G. Marsh

Abstract: The prenylated-flavin mononucleotide-dependent decarboxylases (also known as UbiD-like enzymes) are the most recently discovered family of decarboxylases. The modified flavin facilitates the decarboxylation of unsaturated carboxylic acids through a novel mechanism involving 1,3-dipolar cyclo-addition chemistry. UbiD-like enzymes have attracted considerable interest for biocatalysis applications due to their ability to catalyse (de)carboxylation reactions on a broad range of aromatic substrates at otherwise unreactive carbon centres. There are now ～35[thin space (1/6-em)]000 protein sequences annotated as hypothetical UbiD-like enzymes. Sequence similarity network analyses of the UbiD protein family suggests that there are likely dozens of distinct decarboxylase enzymes represented within this family. Furthermore, many of the enzymes so far characterized can decarboxylate a broad range of substrates. Here we describe a strategy to identify potential substrates of UbiD-like enzymes based on detecting enzyme-catalysed solvent deuterium exchange into potential substrates. Using ferulic acid decarboxylase (FDC) as a model system, we tested a diverse range of aromatic and heterocyclic molecules for their ability to undergo enzyme-catalysed H/D exchange in deuterated buffer. We found that FDC catalyses H/D exchange, albeit at generally very low levels, into a wide range of small, aromatic molecules that have little resemblance to its physiological substrate. In contrast, the sub-set of aromatic carboxylic acids that are substrates for FDC-catalysed decarboxylation is much smaller. We discuss the implications of these findings for screening uncharacterized UbiD-like enzymes for novel (de)carboxylase activity.

Janssens, Liesl K ; Ametovski, Adam ; Sparkes, Eric ; Boyd, Rochelle ; Lai, Felcia ; Maloney, Callan J , et al.

Abstract: Over 200 synthetic cannabinoid receptor agonists (SCRAs) have been identified as newpsychoactive substances. EffectivemonitoringandcharacterizationofSCRAsarehindered by the rapid pace of structural evolution. Ahead of possible appearanceontheillicitdrugmarket,newSCRAsweresynthesized tocompletea systematic libraryof cumyl-indole-(e.g.,CUMYL CPrMICA,CUMYL-CPMICA)andcumyl-indazole-carboxamides (e.g.,CUMYL-CPrMINACA,CUMYL-CPMINACA), encompass ing butyl, pentyl, cyclopropylmethyl, cyclobutylmethyl, cyclo pentylmethyl, andcyclohexylmethyl tails.Comprehensivepharma cologicalcharacterizationwasperformedwiththreeassayformats, monitoring the recruitment of either wild-type or C-terminally truncated(βarr2d366)β-arrestin2totheactivatedcannabinoid1 receptor(CB1)ormonitoringGβγ-mediatedmembranehyperpolarization.Alteredcompoundcharacterizationwasobservedwhen comparingderivedpotency(EC50)andefficacy(Emax)values frombothassaysmonitoringthesameoradifferentsignalingevent, whereasrangesandrankingordersweresimilar.Structure?activityrelationships(SAR)wereassessedinthreefold, resultinginthe identificationof thependant tailasacriticalpharmacophore,withtheoptimalchainlengthforCB1activationapproximatingann pentyl (e.g., cyclopentylmethyl or cyclohexylmethyl tail). The activityof the SCRAs encompassing cyclic tails decreasedwith decreasingnumberofcarbonsformingthecyclicmoiety,withCUMYL-CPrMICAshowingtheleastCB1activityinallassayformats. The SARs were rationalized viamolecular docking, demonstrating the importance of the optimal steric contributionof the hydrophobictail.WhileSARconclusionsremainedlargelyunchanged, thedifferential compoundcharacterizationbybothsimilar anddifferentassaydesignsemphasizestheimportanceofdetailingspecificassaycharacteristicstoallowadequateinterpretationof potenciesandefficacies.

Keywords: structure?activity relationship ; functional assays ; membrane potential ; βarrestin2 recruitment ; new psychoactive substances ; molecular docking

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Shriver, James A. ; Kaller, Kaylie S. ; Kinsey, Ally L. ; Wang, Katelyn R. ; Sterrenberg, Summer R. ; Van Vors, Madison K. , et al.

Abstract: The spontaneous conversion of 3-indoxyl to indigo was a well-established process used to produce indigo dyes. It was recently shown that some indoles, when reacted with molybdenum hexacarbonyl and cumyl peroxide, proceed through an indoxyl intermediate to produce significant amounts of indirubin through a competing mechanism. Modulation of this system to lower temperatures allows for careful tuning, leading to selective production of indirubins in a general process. A systematic assay of indoles show that electron deficient indoles work well when substituted at the 5 and 7 positions. In contrast, 6-substituted electron rich indoles give the best results whereas halogeno indoles work well in all cases. This process shows broad functional group tolerance for generally reactive carbonyl-containing compounds such as aldehydes and carboxylic acids.

Pike, Edward ; Grafinger, Katharina Elisabeth ; Cannaert, Annelies ; Ametovski, Adam ; Luo, Jia Lin ; Sparkes, Eric , et al.

Abstract: Synthetic cannabinoid receptor agonists (SCRAs) are one of the largest and most structurally diverse classes of new psychoactive substances. In this first of a three-part series, author describe the synthesis, anal. characterization, and binding affinity of a proactively generated, systematic library of 30 indole, indazole, and 7-azaindole SCRAs related to MMB-4en-PICA, MDMB-4en-PINACA, ADB-4en-PINACA, and MMB-4CN-BUTINACA featuring a 4-pentenyl, Bu, or 4-cyanobutyl tail and a Me L-valinate (MMB), Me L-tert-leucinate (MDMB), Me L-phenylalaninate (MPP), L-valinamide (AB), L-tert-leucinamide (ADB), L-phenylalaninamide (APP), adamantyl (A), or cumyl head group. Competitive radioligand binding assays demonstrated that the indazole core conferred the highest CB1 binding affinity (Ki = 0.17-39 nM), followed by indole- (Ki = 0.95-160 nM) and then 7-azaindole-derived SCRAs (Ki = 5.4-271 nM). Variation of the head group had the greatest effect on binding, with tert-leucine amides and Me esters (Ki = 0.17-14 nM) generally showing the greatest affinities, followed by valine derivatives (Ki = 0.72-180 nM), and then phenylalanine derivatives (Ki = 2.5-271 nM). Adamantyl head groups (Ki = 8.8-59 nM) were suboptimal for binding, whereas the cumyl analogs consistently conferred high affinity (Ki = 0.62-36 nM). Finally, both Bu (Ki = 3.1-163 nM) and 4-cyanobutyl (Ki = 5.5-44 nM) tail groups were less favorable for CB1 binding than their corresponding 4-pentenyl counterparts (Ki = 0.72-25 nM).

Keywords: 4en ; ADB ; MDMB ; PINACA ; cannabinoid

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Product Details of Indole

CAS No. :120-72-9
Formula : C8H7N
M.W : 117.15
SMILES Code : C12=C(NC=C2)C=CC=C1
MDL No. :MFCD00005607
InChI Key :SIKJAQJRHWYJAI-UHFFFAOYSA-N
Pubchem ID :798

Safety of Indole

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H302-H311-H319-H400
Precautionary Statements:P264-P270-P273-P280-P301+P312+P330-P302+P352+P312-P305+P351+P338-P337+P313-P391-P405-P501
Class:6.1
UN#:2811
Packing Group:Ⅲ
 

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