2724-56-3Relevant articles and documents
Carrier Protein-Free Enzymatic Biaryl Coupling in Arylomycin A2 Assembly and Structure of the Cytochrome P450 AryC**
Aldemir, Hülya,Einsiedler, Manuel,Gulder, Tobias A. M.,Harteis, Sabrina,Hong, Hanna,Milzarek, Tobias M.,Richarz, René,Schaefers, Francoise,Schneider, Sabine,Shu, Shuangjie
supporting information, (2021/11/30)
The arylomycin antibiotics are potent inhibitors of bacterial type I signal peptidase. These lipohexapeptides contain a biaryl structural motif reminiscent of glycopeptide antibiotics. We herein describe the functional and structural evaluation of AryC, the cytochrome P450 performing biaryl coupling in biosynthetic arylomycin assembly. Unlike its enzymatic counterparts in glycopeptide biosynthesis, AryC converts free substrates without the requirement of any protein interaction partner, likely enabled by a strongly hydrophobic cavity at the surface of AryC pointing to the substrate tunnel. This activity enables chemo-enzymatic assembly of arylomycin A2 that combines the advantages of liquid- and solid-phase peptide synthesis with late-stage enzymatic cross-coupling. The reactivity of AryC is unprecedented in cytochrome P450-mediated biaryl construction in non-ribosomal peptides, in which peptidyl carrier protein (PCP)-tethering so far was shown crucial both in vivo and in vitro.
Stereoselective synthesis of unnatural (2S, 3S)-6-hydroxy-4-sphingenine-containing sphingolipids
Leichnitz, Daniel,Pflanze, Sebastian,Beemelmanns, Christine
, p. 6964 - 6969 (2019/08/01)
6-Hydroxy-(4E)-sphingenine-containing sphingolipids are found in mammalian and bacterial membranes and have multiple intra- and intercellular functions. Most sphingolipids contain a (2S,3R)-2-amino-1,3-diol core structure, but only limited examples of unnatural (2S,3S)-2-amino-1,3-diol derivates have so far been reported. Using an underexplored hydrozirconation-transmetalation reaction and an unusual three-step-one-pot deprotection sequence, we were able to synthesize several unnatural (2S,3S)-6-hydroxy-(4E)-sphingenine-containing sphingolipids in only three (protected) or four (deprotected) consecutive steps, respectively, including a fluoresence-labeled derivative suitable for future biological studies.
New hydroxamic acid derivative and use thereof
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, (2016/12/07)
PROBLEM TO BE SOLVED: To provide a novel hydroxamic acid derivative having an inhibitory activity against KDM7 being a histone demethylase, and a cancer cell proliferation-suppressing action, and to provide medicines (particularly a KDM7 inhibitor and anticancer agent) using the derivative.SOLUTION: A compound represented by general formula (I) (wherein R is a linear, branched or annular alkyl group; and n is an integer of ≥6), a salt thereof, hydrate, solvate or prodrug are provided. The compound can be used as a medicine (particularly an anticancer agent) or a KDM7 inhibitor.
A practical synthesis of long-chain iso-fatty acids (iso-C 12-C19) and related natural products
Richardson, Mark B.,Williams, Spencer J.
, p. 1807 - 1812 (2013/10/22)
A gram-scale synthesis of terminally-branched iso-fatty acids (iso-C 12-C19) was developed commencing with methyl undec-10-enoate (methyl undecylenate) (for iso-C12-C14) or the C15 and C16 lactones pentadecanolide (for iso-C 15-C17) and hexadecanolide (for iso-C18-C 19). Central to the approaches outlined is the two-step construction of the terminal isopropyl group through addition of methylmagnesium bromide to the ester/lactones and selective reduction of the resulting tertiary alcohols. Thus, the C12, C17 and C18 iso-fatty acids were obtained in three steps from commercially-available starting materials, and the remaining C13-C16 and C19 iso-fatty acids were prepared by homologation or recursive dehomologations of these fatty acids or through intercepting appropriate intermediates. Highlighting the synthetic potential of the iso-fatty acids and various intermediates prepared herein, we describe the synthesis of the natural products (S)-2,15-dimethylpalmitic acid, (S)-2-hydroxy-15-methylpalmitic acid, and 2-oxo-14-methylpentadecane.
Identification of the KDM2/7 histone lysine demethylase subfamily inhibitor and its antiproliferative activity
Suzuki, Takayoshi,Ozasa, Hiroki,Itoh, Yukihiro,Zhan, Peng,Sawada, Hideyuki,Mino, Koshiki,Walport, Louise,Ohkubo, Rei,Kawamura, Akane,Yonezawa, Masato,Tsukada, Yuichi,Tumber, Anthony,Nakagawa, Hidehiko,Hasegawa, Makoto,Sasaki, Ryuzo,Mizukami, Tamio,Schofield, Christopher J.,Miyata, Naoki
, p. 7222 - 7231 (2013/10/21)
Histone Nε-methyl lysine demethylases KDM2/7 have been identified as potential targets for cancer therapies. On the basis of the crystal structure of KDM7B, we designed and prepared a series of hydroxamate analogues bearing an alkyl chain. Enzyme assays revealed that compound 9 potently inhibits KDM2A, KDM7A, and KDM7B, with IC50s of 6.8, 0.2, and 1.2 μM, respectively. While inhibitors of KDM4s did not show any effect on cancer cells tested, the KDM2/7-subfamily inhibitor 9 exerted antiproliferative activity, indicating the potential for KDM2/7 inhibitors as anticancer agents.
Isolation of the β-galactosphingolipid coniferoside using a tumor cell proteome reverse affinity protocol
La Clair, James J.,Rodriguez, Abimael D.
experimental part, p. 6645 - 6653 (2011/12/21)
New approaches are vital to the development of marine natural products (MNP) as therapeutic leads. One of the more time consuming aspects of MNP research arises in the connection between structure and function. Here, we describe an isolation protocol that adapts tumor cell proteomes as a vehicle for MNP isolation therein uniting structural and functional analysis. Application of this method to extracts of the sponge Agelas conifera led to the isolation of a unique poly-hydroxybutyrated β-galactosphingolipid, coniferoside.
Intramolecular suzuki-miyaura reaction for the total synthesis of signal peptidase inhibitors, arylomycins A2and B2
Dufour, Jeremy,Neuville, Luc,Zhu, Jieping
supporting information; experimental part, p. 10523 - 10534 (2010/11/04)
Development of the total syntheses of arylomycins A1 and B 2 is detailed. Key features of our approach include 1) formation of 14-membered meta, meta-cyclophane by an intramolecular Suzuki-Miyaura reaction; 2) incorporation of N-Me-4-hydroxyphenylglycine into the cyclization precursor, which avoids the late-stage low-yielding N-methylation step; 3) segment coupling of a fully elaborated peptide side chain to the macrocycle, which makes the synthesis highly convergent. Overall, arylomycin A2 was obtained in 13 steps from L-Tyr for the longest linear sequence, in 13% overall yield. Arylomycin B2 was synthesized in 10 steps from L-3-nitro-Tyr, in 10% overall yield.
PRODUCTION METHOD OF CAPSINOID BY DEHYDRATING CONDENSATION, STABILIZING METHOD OF CAPSINOID, AND CAPSINOID COMPOSITION
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Page/Page column 51, (2008/06/13)
In the production methods of capsinoid by esterification using an enzyme, a method of conveniently obtaining capsinoid in a high yield in a short time without using a dehydrating agent is provided. In addition, a method of stable preservation of produced capsinoid by purifying the obtained capsinoid under stable conditions is provided. A fatty acid represented by the formula (1) and a hydroxymethylphenol represented by the formula (2) are condensed without solvent or in a low-polar solvent, using an enzyme as a catalyst to give an ester compound represented by the formula (3). In addition, a fatty acid represented by the formula (4) is added to the ester compound represented by the formula (3) for stabilization. wherein each symbol is as defined in the specification.
Influence of terminal branching on the transdermal permeation-enhancing activity in fatty alcohols and acids
Klimentova, Jana,Kosak, Petr,Vavrova, Katerina,Holas, Tomas,Hrabalek, Alexandr
, p. 7681 - 7687 (2007/10/03)
In order to investigate the effect of terminal chain branching in the skin permeation enhancers, seven alcohols and seven acids with the chain length of 8-12 carbons and terminal methyl or ethyl branching were prepared. Their transdermal permeation-enhancing activities were evaluated in vitro using theophylline as a model permeant and porcine skin, and compared to those of the linear standards. Terminal methyl branching increased the enhancing activity only in 12C acid, no effect was seen in the shorter ones. Terminal ethyl however produced a significant increase in activity. In the alcohols, the branching was likely to change the mode of action, due to a different relationship between the activity and the chain length.
