- A three dimensional porous metal-organic framework [Fe4L 6·(DMF)3·(H2O)10] constructed from neutral discrete Fe4L6 pyramids [H 2L = 1,3-benzodihydroxamix acid]
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A 3-D porous zeolite-like metal-organic framework surviving guest removal is assembled from a well-defined tetrahedral Fe4L6 cavity by the cooperativity of hydrogen bonds and π-π stacking.
- Bai, Yan,Guo, Dong,Duan, Chun-Ying,Dang, Dong-Bin,Pang, Ke-Liang,Meng, Qing-Jin
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- An Exceptionally Stable Metal-Organic Framework Constructed from Chelate-Based Metal-Organic Polyhedra
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We report the rational design and synthesis of a water-stable metal-organic framework (MOF), Fe-HAF-1, constructed from supramolecular, Fe3+-hydroxamate-based polyhedra with mononuclear metal nodes. Owing to its chelate-based construction, Fe-H
- Chiong, Jerika A.,Zhu, Jie,Bailey, Jake B.,Kalaj, Mark,Subramanian, Rohit H.,Xu, Wenqian,Cohen, Seth M.,Tezcan, F. Akif
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Read Online
- Preparation method of a plurality of (hetero) aromatic polyamines
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The invention relates to the field of organic functional new material chemicals, and discloses a novel process technology for preparing a plurality of (hetero) aromatic polyamines through corresponding (hetero) aromatic polyfunctional hydroxamic acids (hydroxamic acid) before (re-arrangement). These (hetero) aromatic polyamines are well-known dyes and pigment and pharmaceutical pesticide-related fields of very wide range of critical fine chemical materials.
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Paragraph 0029-0031
(2021/09/15)
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- NADP-dependent glutamate dehydrogenases in a dimorphic zygomycete Benjaminiella poitrasii: Purification, characterization and their evaluation as an antifungal drug target
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Background: It has been reported that the genes coding for NADP-dependent glutamate dehydrogenases (NADP-GDHs) showed a cause-effect relationship with Yeast-Hypha (Y[sbnd]H) reversible transition in a zygomycete Benjaminiella poitrasii. As Y[sbnd]H transition is significant in human pathogenic fungi for their survival and proliferation in the host, the NADP-GDHs can be explored as antifungal drug targets. Methods: The yeast-form specific BpNADPGDH I and hyphal-form specific BpNADPGDH II of B. poitrasii were purified by heterologous expression in E. coli BL-21 cells and characterized. The structural analogs of L-glutamate, dimethyl esters of isophthalic acid (DMIP) and its derivatives were designed, synthesized and screened for inhibition of NADP-GDH activity as well as Y[sbnd]H transition in B. poitrasii, and also in human pathogenic Candida albicans strains. Results: The BpNADPGDH I and BpNADPGDH II were found to be homo-hexameric proteins with native molecular mass of 282 kDa and 298 kDa, respectively and subunit molecular weights of 47 kDa and 49 kDa, respectively. Besides the distinct kinetic properties, BpNADPGDH I and BpNADPGDH II were found to be regulated by cAMP-dependent- and Calmodulin (CaM) dependent- protein kinases, respectively. The DMIP compounds showed a more pronounced effect on H-form specific BpNADPGDH II and inhibited Y[sbnd]H transition as well as growth in B. poitrasii and C. albicans strains. Conclusion: The present study will be useful to design and develop antifungal drugs against dimorphic human pathogens using glutamate dehydrogenase as a target. Significance: Glutamate dehydrogenases can be explored as a target against human pathogenic fungi.
- Deshpande, Mukund V.,Kulkarni, Anand M.,Pathan, Ejaj K.,Prasanna, Nallaballe V. L.,Ramana, Chepuri V.
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- Tunable and Cooperative Thermomechanical Properties of Protein-Metal-Organic Frameworks
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We recently introduced protein-metal-organic frameworks (protein-MOFs) as chemically designed protein crystals, composed of ferritin nodes that predictably assemble into 3D lattices upon coordination of various metal ions and ditopic, hydroxamate-based li
- Bailey, Jake B.,Tezcan, F. Akif
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supporting information
p. 17265 - 17270
(2020/11/12)
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- Monohydroxamic acids and bridging dihydroxamic acids as chelators to ruthenium(iii) and as nitric oxide donors: Syntheses, speciation studies and nitric oxide releasing investigation
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The synthesis and spectroscopic characterisation of novel mononuclear RuIII(edta)(hydroxamato) complexes of general formula [Ru(H 2edta)(monoha)] (where monoha = 3- or 4-NH2, 2-, 3- or 4-Cl and 3-Me-phenylhydroxamato), as well as the first example of a Ru III-N-aryl aromatic hydroxamate, [Ru(H2edta)(N-Me-bha)] ·H2O (N-Me-bha = N-methylbenzohydroxamato) are reported. Three dinuclear RuIII complexes with bridging dihydroxamato ligands of general formula [{Ru(H2edta)}2(μ-diha)] where diha = 2,6-pyridinedihydroxamato and 1,3- or 1,4-benzodihydroxamato, the first of their kind with RuIII, are also described. The speciation of all of these systems (with the exception of the Ru-1,4-benzodihydroxamic acid and Ru-N-methylbenzohydroxamic systems) in aqueous solution was investigated. We previously proposed that nitrosyl abstraction from hydroxamic acids by Ru III involves initial formation of RuIII-hydroxamates. Yet, until now, no data on the rate of nitric oxide (NO) release from hydroxamic acids has been published. We now describe a UV-VIS spectroscopic study, where we monitored the decrease in the ligand-to-metal charge-transfer band of a series of RuIII-monohydroxamates with time, with a view to gaining an insight into the NO-releasing properties of hydroxamic acids. The Royal Society of Chemistry.
- Griffith, Darren,Krot, Krystyna,Comiskey, Jedd,Nolan, Kevin B.,Marmion, Celine J.
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p. 137 - 147
(2008/04/13)
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