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Ünver Y, Süleymanoğlu N, Ustabaş R, Bektaş Kİ, Bektaş E, Güler Hİ. 3-(5-(1 H-imidazol-1-yl) pent-1-en-1-yl)-9-ethyl-9 H-carbazole: synthesis, characterization (IR, NMR), DFT, antimicrobial-antioxidant activities and docking study. J Biomol Struct Dyn 2022; 40:12990-13000. [PMID: 34514967 DOI: 10.1080/07391102.2021.1977708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
3-(5-(1H-imidazol-1-yl) pent-1-en-1-yl)-9-ethyl-9H-carbazole called as compound 1 was synthesized and characterized by proton and carbon-13 nuclear magnetic resonance (1H- and 13C- NMR) and Fourier transform infrared (FTIR) spectroscopic methods. Density Functional Theory/Becke, 3-parameter (DFT/B3LYP), for compound 1 were performed with 6-311++G(d,p) method. Optimized geometry, frontier molecular orbitals (HOMO; highest occupied molecular orbital; LUMO: lowest unoccupied molecular orbital), IR and NMR parameters of compound 1 were obtained. The evaluations reveal that the calculation results support the experimental results. In addition, the antimicrobial (a microwell dilution method) and antioxidant activities (2,2-Diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS) ferric ion reducing antioxidant power (FRAP) of compound 1 were evaluated. According to the results obtained, it showed higher antimicrobial activity (Minimal inhibition concentration (MIC): 78.12 µg/mL) against B. subtilis subsp. Spizizenii. Morever, molecular docking studies were carried out to investigate the interactions of an antimicrobial agent on some important enzymes played important roles in nucleic acid (Deoxyribo nucleic acid (DNA) synthesis, cell wall synthesis, protein synthesis, and metabolism etc. The compound 1 was strongly bound to tyrosyl-tRNA synthetase enzyme (binding energy: -11.18 and Ki: 6.37 nM) and Beta-Ketoacyl-Acp Synthase III enzyme (binding energy: -10.29 and Ki: 28.47 nM).Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Yasemin Ünver
- Faculty of Sciences, Department of Chemistry, Karadeniz Technical University, Trabzon, Turkey
| | - Nevin Süleymanoğlu
- Vocational School of Technical Sciences, Gazi University, Ankara, Turkey
| | - Reşat Ustabaş
- Educational Faculty, Department of Mathematics and Science Education, Ondokuz Mayıs University, Samsun, Turkey
| | - Kadriye İnan Bektaş
- Faculty of Science, Department of Molecular Biology and Genetics, Karadeniz Technical University, Trabzon, Turkey
| | - Ersan Bektaş
- Espiye Vocational School, Giresun University, Giresun, Turkey
| | - Halil İbrahim Güler
- Faculty of Science, Department of Molecular Biology and Genetics, Karadeniz Technical University, Trabzon, Turkey
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Haro-Reyes T, Díaz-Peralta L, Galván-Hernández A, Rodríguez-López A, Rodríguez-Fragoso L, Ortega-Blake I. Polyene Antibiotics Physical Chemistry and Their Effect on Lipid Membranes; Impacting Biological Processes and Medical Applications. MEMBRANES 2022; 12:membranes12070681. [PMID: 35877884 PMCID: PMC9316096 DOI: 10.3390/membranes12070681] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 01/27/2023]
Abstract
This review examined a collection of studies regarding the molecular properties of some polyene antibiotic molecules as well as their properties in solution and in particular environmental conditions. We also looked into the proposed mechanism of action of polyenes, where membrane properties play a crucial role. Given the interest in polyene antibiotics as therapeutic agents, we looked into alternative ways of reducing their collateral toxicity, including semi-synthesis of derivatives and new formulations. We follow with studies on the role of membrane structure and, finally, recent developments regarding the most important clinical applications of these compounds.
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Affiliation(s)
- Tammy Haro-Reyes
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico; (T.H.-R.); (L.D.-P.); (A.G.-H.)
| | - Lucero Díaz-Peralta
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico; (T.H.-R.); (L.D.-P.); (A.G.-H.)
| | - Arturo Galván-Hernández
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico; (T.H.-R.); (L.D.-P.); (A.G.-H.)
| | - Anahi Rodríguez-López
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca 62210, Morelos, Mexico; (A.R.-L.); (L.R.-F.)
| | - Lourdes Rodríguez-Fragoso
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca 62210, Morelos, Mexico; (A.R.-L.); (L.R.-F.)
| | - Iván Ortega-Blake
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad s/n, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico; (T.H.-R.); (L.D.-P.); (A.G.-H.)
- Correspondence: ; Tel.: +52-77-7329-1762
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Pham EC, Truong TN, Dong NH, Vo DD, Hong Do TT. Synthesis of a Series of Novel 2-Amino-5-Substituted 1,3,4-oxadiazole and 1,3,4-thiadiazole Derivatives as Potential Anticancer, Antifungal and Antibacterial Agents. Med Chem 2021; 18:558-573. [PMID: 34344293 DOI: 10.2174/1573406417666210803170637] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 04/24/2021] [Accepted: 04/25/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Many compounds containing a five-membered heterocyclic ring display exceptional chemical properties and versatile biological activities. OBJECTIVE The objective of the present study was the desire to prepare the 5-substituted 2-amino-1,3,4-oxadiazole and 2-amino-1,3,4-thiadiazole derivatives and evaluate their potential anticancer, antibacterial and antifungal activities. METHODS Twenty-seven derivatives were synthesized by iodine-mediated cyclization of semicarbazones or thiosemicarbazones obtained from condensation of semicarbazide or thiosemicarbazide and aldehydes. The structures were confirmed by 1H-NMR, 13C-NMR and MS spectra. The antibacterial and antifungal activities were evaluated by diffusion method and the anticancer activities were evaluated by MTT assay. RESULTS Twenty-seven derivatives have been synthesized in moderate to good yields. A number of derivatives exhibited potential antibacterial, antifungal and anticancer activities. CONCLUSION Compounds (1b, 1e and 1g) showed antibacterial activity against Streptococcus faecalis, MSSA and MRSA with MIC ranging between 4 to 64 µg/mL. Compound (2g) showed antifungal activity against Candida albicans (8 µg/mL) and Aspergillus niger (64 µg/mL). Compound (1o) exhibited high cytotoxic activity against HepG2 cell line (IC50 value 8.6 µM), which is comparable to the activity of paclitaxel, and is non-toxic on LLC-PK1 normal cell line. The structure activity relationship and molecular docking study of the synthesized compounds are also reported.
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Affiliation(s)
- Em Canh Pham
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh city. Vietnam
| | - Tuyen Ngoc Truong
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh city. Vietnam
| | - Nguyen Hanh Dong
- Department of Organic Chemistry, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh city. Vietnam
| | - Duy Duc Vo
- Department of Chemistry, and Department of Cell and Molecular Biology, Uppsala University, Uppsala city. Sweden
| | - Tuoi Thi Hong Do
- Department of Pharmacology, Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh city, 700000 Ho Chi Minh city. Vietnam
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Taghi-zada TP, Kasumov KM. Are Levorin Channels with Selective Permeability Capable of Enhancing Muscle Activity in Complex with Carriers? RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020060333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liu W, Yuan L, Wang S. Recent Progress in the Discovery of Antifungal Agents Targeting the Cell Wall. J Med Chem 2020; 63:12429-12459. [PMID: 32692166 DOI: 10.1021/acs.jmedchem.0c00748] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Due to the limit of available treatments and the emergence of drug resistance in the clinic, invasive fungal infections are an intractable problem with high morbidity and mortality. The cell wall, as a fungi-specific structure, is an appealing target for the discovery and development of novel and low-toxic antifungal agents. In an attempt to accelerate the discovery of novel cell wall targeted drugs, this Perspective will provide a comprehensive review of the progress made to date on the development of fungal cell wall inhibitors. Specifically, this review will focus on the targets, discovery process, chemical structures, antifungal activities, and structure-activity relationships. Although two types of cell wall antifungal agents are clinically available or in clinical trials, it is still a long way for the other cell wall targeted inhibitors to be translated into clinical applications. Future efforts should be focused on the identification of inhibitors against novel conserved cell wall targets.
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Affiliation(s)
- Wei Liu
- Faculty of Pharmacy, School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xuefu Middle Road, Xi'an 710021, People's Republic of China
| | - Lin Yuan
- Faculty of Pharmacy, School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xuefu Middle Road, Xi'an 710021, People's Republic of China
| | - Shengzheng Wang
- Department of Medicinal Chemistry and Pharmaceutical Analysis, School of Pharmacy, Fourth Military Medical University, 169 Changle West Road, Xi'an 710032, People's Republic of China
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Taghi-zada TP, Kasumov KM. The Properties of Ion Channels in Lipid Membranes Modified by the Aromatic Antibiotic Levorin А2. Biophysics (Nagoya-shi) 2020. [DOI: 10.1134/s0006350920040235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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The rational design, synthesis, and antimicrobial investigation of 2-Amino-4-Methylthiazole analogues inhibitors of GlcN-6-P synthase. Bioorg Chem 2020; 99:103781. [DOI: 10.1016/j.bioorg.2020.103781] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/15/2020] [Accepted: 03/19/2020] [Indexed: 12/21/2022]
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SULAIMAN M, HASSAN Y, TASKİN TOK T, NOUNDOU XS. SYNTHESIS, ANTIBACTERIAL ACTIVITY AND DOCKING STUDIES OF BENZYL ALCOHOL DERIVATIVES. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2020. [DOI: 10.18596/jotcsa.692113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Antifungal Agents in Agriculture: Friends and Foes of Public Health. Biomolecules 2019; 9:biom9100521. [PMID: 31547546 PMCID: PMC6843326 DOI: 10.3390/biom9100521] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/12/2019] [Accepted: 09/19/2019] [Indexed: 12/14/2022] Open
Abstract
Fungal diseases have been underestimated worldwide but constitute a substantial threat to several plant and animal species as well as to public health. The increase in the global population has entailed an increase in the demand for agriculture in recent decades. Accordingly, there has been worldwide pressure to find means to improve the quality and productivity of agricultural crops. Antifungal agents have been widely used as an alternative for managing fungal diseases affecting several crops. However, the unregulated use of antifungals can jeopardize public health. Application of fungicides in agriculture should be under strict regulation to ensure the toxicological safety of commercialized foods. This review discusses the use of antifungals in agriculture worldwide, the need to develop new antifungals, and improvement of regulations regarding antifungal use.
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Kertmen A, Przysiecka Ł, Coy E, Popenda Ł, Andruszkiewicz R, Jurga S, Milewski S. Emerging Anticancer Activity of Candidal Glucoseamine-6-Phosphate Synthase Inhibitors upon Nanoparticle-Mediated Delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5281-5293. [PMID: 30912436 DOI: 10.1021/acs.langmuir.8b04250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Numerous glutamine analogues have been reported as irreversible inhibitors of the glucosamine-6-phosphate (GlcN-6-P) synthase in pathogenic Candida albicans in the last 3.5 decades. Among the reported inhibitors, the most effective N3-(4-methoxyfumaroyl)-l-2,3-diaminopropanoic acid (FMDP) has been extensively studied in order to develop its more active analogues. Several peptide-FMDP conjugates were tested to deliver FMDP to its subcellularly located GlcN-6-P synthase target. However, the rapid development of fungal resistance to FMDP-peptides required development of different therapeutic approaches to tackle antifungal resistance. In the current state of the global antifungal resistance, subcellular delivery of FMDP via free diffusion or endocytosis has become crucial. In this study, we report on in vitro nanomedical applications of FMDP and one of its ketoacid analogues, N3- trans-4-oxo-4-phenyl-2-butenoyl-l-2,3-diaminopropanoic acid (BADP). FMDP and BADP covalently attached to polyethylene glycol-coated iron oxide/silica core-shell nanoparticles are tested against intrinsically multidrug-resistant C. albicans. Three different human cancer cell lines potentially overexpressing the GlcN-6-P synthase enzyme are tested to demonstrate the immediate inhibitory effects of nanoparticle conjugates against mammalian cells. It is shown that nanoparticle-mediated delivery transforms FMDP and BADP into strong anticancer agents by inhibiting the growth of the tested cancer cells, whereas their anti-Candidal activity is decreased. This study discusses the emerging inhibitory effect of the FMDP/BADP-nanoparticle conjugates based on their cellular internalization efficiency and biocompatibility.
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Affiliation(s)
- Ahmet Kertmen
- Department of Pharmaceutical Technology and Biochemistry , Gdansk University of Technology , G. Narutowicza 11/12 , 80-233 Gdansk , Poland
| | | | | | | | - Ryszard Andruszkiewicz
- Department of Pharmaceutical Technology and Biochemistry , Gdansk University of Technology , G. Narutowicza 11/12 , 80-233 Gdansk , Poland
| | | | - Sławomir Milewski
- Department of Pharmaceutical Technology and Biochemistry , Gdansk University of Technology , G. Narutowicza 11/12 , 80-233 Gdansk , Poland
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Kwiatkowska-Semrau K, Wojciechowski M, Gabriel I, Crucho S, Milewski S. Modification of quaternary structure of Candida albicans GlcN-6-P synthase and its desensitization to inhibition by UDP-GlcNAc by site-directed mutagenesis. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2018; 1866:1181-1189. [DOI: 10.1016/j.bbapap.2018.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/15/2018] [Indexed: 02/02/2023]
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12
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Flefel EM, El-Sofany WI, El-Shahat M, Naqvi A, Assirey E. Synthesis, Molecular Docking and in Vitro Screening of Some Newly Synthesized Triazolopyridine, Pyridotriazine and Pyridine⁻Pyrazole Hybrid Derivatives. Molecules 2018; 23:molecules23102548. [PMID: 30301217 PMCID: PMC6222704 DOI: 10.3390/molecules23102548] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/02/2018] [Accepted: 10/03/2018] [Indexed: 11/16/2022] Open
Abstract
A series of novel pyridine and fused pyridine derivatives have been prepared starting from 6-(3,4-dimethylphenyl)-2-hydrazinyl-4-(thiophen-2-yl)-pyridine-3-carbonitrile 1 which on treatment with appropriate formic acid, acetic acid/acetic anhydride, benzoyl chloride and/or carbon disulfide afforded the corresponding triazolopyridine derivatives 2–5. Also, treatment of hydrazide 1 with diethyloxalate, chloroacetyl chloride, chloroacetic acid and/or 1,2-dichloroethane yielded the corresponding pyridotriazine derivatives 7–10. Further transformation of compound 1 with a different active methylene group, namely acetyl acetone, diethylmalonate, ethyl cyanoacetate, ethyl benzoylacetate and/or ethyl acetoacetate, produced the pyridine–pyrazole hybrid derivatives 11–15. These newly synthesized compounds (1–15) were subjected to in silico molecular docking screenings towards GlcN-6-P synthase as the target protein. The results revealed moderate to good binding energies of the ligands on the target protein. All the newly prepared products exhibited antimicrobial and antioxidant activity.
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Affiliation(s)
- Eman M Flefel
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Monawarah 1343, Saudi Arabia.
- Department of Photochemistry, Chemical Industries Research Division, National Research Centre, 33 EL-Bohouth St., Dokki 12622, Giza, Egypt.
| | - Walaa I El-Sofany
- Department of Photochemistry, Chemical Industries Research Division, National Research Centre, 33 EL-Bohouth St., Dokki 12622, Giza, Egypt.
| | - Mahmoud El-Shahat
- Department of Photochemistry, Chemical Industries Research Division, National Research Centre, 33 EL-Bohouth St., Dokki 12622, Giza, Egypt.
| | - Arshi Naqvi
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Monawarah 1343, Saudi Arabia.
| | - Eman Assirey
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Monawarah 1343, Saudi Arabia.
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Obydennov KL, Khamidullina LA, Galushchinskiy AN, Shatunova SA, Kosterina MF, Kalinina TA, Fan Z, Glukhareva TV, Morzherin YY. Discovery of Methyl (5 Z)-[2-(2,4,5-Trioxopyrrolidin-3-ylidene)-4-oxo-1,3-thiazolidin-5-ylidene]acetates as Antifungal Agents against Potato Diseases. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6239-6245. [PMID: 29807429 DOI: 10.1021/acs.jafc.8b02151] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synthesis, isomerism, and fungicidal activity against potato diseases of new (5 Z)-[2-(2,4,5-trioxopyrrolidin-3-ylidene)-4-oxo-1,3-thiazolidin-5-ylidene]acetate derivatives with 1,3-thiazolidine-4-one and pyrrolidine-2,3,5-trione moieties linked by an exocyclic C═C bond were described. Their structures were clearly confirmed by spectroscopic and spectrometric data (Fourier transform infrared spectroscopy, 1H and 13C nuclear magnetic resonance, and mass spectrometry), elemental analysis, and X-ray diffraction crystallography. A bioassay for antifungal activity in vitro against Phytophthora infestans, Fusariun solani, Alternaria solani, Rhizoctonia solani, and Colletotrichum coccodes demonstrated that 2,4,5-trioxopyrrolidin-1,3-thiazolidine derivatives exhibited a relatively broad spectrum of antifungal activity. One of the compounds showed considerable activity against all of the strains; in the case of F. solani, P. infestans, and A. solani, it possesses comparable or better fungicidal efficacy than the positive control Consento. Consequently, this compound is a promising fungicidal candidate for plant protection.
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Affiliation(s)
| | - Liliya A Khamidullina
- Ural Federal University , 19 Mira Street , Ekaterinburg 620002 , Russia
- Postovsky Institute of Organic Synthesis , Ural Branch of the Russian Academy of Sciences (UB RAS) , 22 Sofia Kovalevskaya Street , Ekaterinburg 620990 , Russia
| | | | | | | | | | | | | | - Yuri Yu Morzherin
- Ural Federal University , 19 Mira Street , Ekaterinburg 620002 , Russia
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Samedova AA, Tagi-zade TP, Kasumov KM. Dependence of Ion Channel Properties Formed by Polyene Antibiotics Molecules on the Lactone Ring Structure. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1068162018030135] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ansari A, Ali A, Asif M, Rauf MA, Owais M. Facile one-pot multicomponent synthesis and molecular docking studies of steroidal oxazole/thiazole derivatives with effective antimicrobial, antibiofilm and hemolytic properties. Steroids 2018; 134:22-36. [PMID: 29653115 DOI: 10.1016/j.steroids.2018.04.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/17/2018] [Accepted: 04/06/2018] [Indexed: 10/17/2022]
Abstract
A series of steroidal oxazole and thiazole derivatives have been synthesized employing thiosemicarbazide/semicarbazide hydrochloride and ethyl 2-chloroacetoacetate with a simple and facile one-pot multicomponent reaction pathway. The antimicrobial activity of newly synthesized compounds were evaluated against four bacterial strains namely Gram-negative (Escherichia coliand Pseudomonas aeruginosa) and Gram-positive bacteria (Staphylococcus aureus and Listeria monocytogenes) in addition to pathogenic fungi (Candida albicans and Cryptococcus neoformans). Bioactivity assay manifested that most of the compounds exhibited good antimicrobial activity. To provide additional insight into antimicrobial activity, the compounds were also tested for their antibiofilm activity against S. aureus biofilm. Moreover, molecular docking study shows binding of compounds with amino acid residues of DNA gyrase and glucosamine-6-phosphate synthase (promising antimicrobial target) through hydrogen bonding interactions. Hemolytic activity have been also investigated to ascertain the effect of compounds over RBC lysis and results indicate good prospects for biocompatibility. The expedient synthesis of steroidal heterocycles, effective antibacterial and antifungal behavior against various clinically relevant human pathogens, promising biocompatibility offer opportunities for further modification and potential applications as therapeutic agents.
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Affiliation(s)
- Anam Ansari
- Steroid Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India
| | - Abad Ali
- Steroid Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India; Organometallic Synthesis and Catalysis Group, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Mohd Asif
- Steroid Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India
| | - Mohd Ahmar Rauf
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Owais
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
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Efficient Synthesis and Bioactivity of Novel Triazole Derivatives. MOLECULES (BASEL, SWITZERLAND) 2018; 23:molecules23040709. [PMID: 29561766 PMCID: PMC6017136 DOI: 10.3390/molecules23040709] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 03/12/2018] [Accepted: 03/15/2018] [Indexed: 11/16/2022]
Abstract
Triazole pesticides are organic nitrogen-containing heterocyclic compounds, which contain 1,2,3-triazole ring. In order to develop potential glucosamine-6-phosphate synthase (GlmS) inhibitor fungicides, forty compounds of triazole derivatives were synthesized in an efficient way, thirty nine of them were new compounds. The structures of all the compounds were confirmed by high resolution mass spectrometer (HRMS), ¹H-NMR and 13C-NMR. The fungicidal activities results based on means of mycelium growth rate method indicated that some of the compounds exhibited good fungicidal activities against P. CapasiciLeonian, Sclerotinia sclerotiorum (Lib.) de Bary, Pyricularia oryzae Cav. and Fusarium oxysporum Schl. F.sp. vasinfectum (Atk.) Snyd. & Hans. at the concentration of 50 µg/mL, especially the inhibitory rates of compounds 1-d and 1-f were over 80%. At the same time, the preliminary studies based on the Elson-Morgan method indicated that the compounds exhibited some inhibitory activity toward glucosamine-6-phosphate synthase (GlmS). These compounds will be further studied as potential antifungal lead compounds. The structure-activity relationships (SAR) were discussed in terms of the effects of the substituents on both the benzene and the sugar ring.
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Aouad MR, Mayaba MM, Naqvi A, Bardaweel SK, Al-blewi FF, Messali M, Rezki N. Design, synthesis, in silico and in vitro antimicrobial screenings of novel 1,2,4-triazoles carrying 1,2,3-triazole scaffold with lipophilic side chain tether. Chem Cent J 2017; 11:117. [PMID: 29159721 PMCID: PMC5696273 DOI: 10.1186/s13065-017-0347-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 11/10/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND 1,2,4-Triazoles and 1,2,3-triazoles have gained significant importance in medicinal chemistry. RESULTS This study describes a green, efficient and quick solvent free click synthesis of new 1,2,3-triazole-4,5-diesters carrying a lipophilic side chain via 1,3-dipolar cycloaddition of diethylacetylene dicarboxylate with different surfactant azides. Further structural modifications of the resulting 1,2,3-triazole diesters to their corresponding 1,2,4-triazole-3-thiones via multi-step synthesis has been also investigated. The structures of the newly designed triazoles have been elucidated based on their analytical and spectral data. These compounds were evaluated for their antimicrobial activities. Relative to the standard antimicrobial agents, derivatives of 1,2,3-triazole-bis-4-amino-1,2,4-triazole-3-thiones were the most potent antimicrobial agents with compound 7d demonstrating comparable antibacterial and antifungal activities against all tested microorganisms. Further, the selected compounds were studied for docking using the enzyme, Glucosamine-6-phosphate synthase. CONCLUSIONS The in silico study reveals that all the synthesized compounds had shown good binding energy toward the target protein ranging from - 10.49 to - 5.72 kJ mol-1 and have good affinity toward the active pocket, thus, they may be considered as good inhibitors of GlcN-6-P synthase.
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Affiliation(s)
- Mohamed Reda Aouad
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
- Department of Chemistry, Faculty of Sciences, University of Sciences and Technology Mohamed Boudiaf, Laboratoire de Chimie et Electrochimie des Complexes Metalliques (LCECM) USTO-MB, P.O. Box 1505, El M‘nouar, 31000 Oran, Algeria
| | - Mariem Mohammed Mayaba
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
| | - Arshi Naqvi
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
| | - Sanaa K. Bardaweel
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Jordan, 11942 Amman, Jordan
| | - Fawzia Faleh Al-blewi
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
| | - Mouslim Messali
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
| | - Nadjet Rezki
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, 30002 Saudi Arabia
- Department of Chemistry, Faculty of Sciences, University of Sciences and Technology Mohamed Boudiaf, Laboratoire de Chimie et Electrochimie des Complexes Metalliques (LCECM) USTO-MB, P.O. Box 1505, El M‘nouar, 31000 Oran, Algeria
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18
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Govori S, Haziri A, Ademi K, Neziraj N. Molecular docking studies of fused coumarin derivatives as inhibitors of GlcN-6. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2017; 52:1041-1045. [PMID: 28737449 DOI: 10.1080/10934529.2017.1340752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The biological activity of heterocyclic compounds depends on their structure, the type of hetero atoms in the ring and on the type of substituents present. In this paper, some heterocyclic compounds with coumarin moieties S1-S5 and novobiocin known as coumarin antibiotic were subjected to the molecular docking studies as important tools for drug discovery. Glucosamine-6-phosphate synthase is selected as a suitable target in this study. In silico studies reveal that all synthesized compounds S1-S5 are good inhibitors of GlcN-6 and the docking results are in agreement with in vitro antibacterial evaluation of compounds S1-S5.
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Affiliation(s)
- Sevdije Govori
- a Faculty of Natural Sciences, Department of Chemistry , University of Prishtina , Prishtina , Republic of Kosovo
| | - Arben Haziri
- a Faculty of Natural Sciences, Department of Chemistry , University of Prishtina , Prishtina , Republic of Kosovo
| | - Kastriot Ademi
- a Faculty of Natural Sciences, Department of Chemistry , University of Prishtina , Prishtina , Republic of Kosovo
| | - Nexhat Neziraj
- a Faculty of Natural Sciences, Department of Chemistry , University of Prishtina , Prishtina , Republic of Kosovo
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19
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Miszkiel A, Wojciechowski M. Long range molecular dynamics study of interactions of the eukaryotic glucosamine-6-phosphate synthase with fructose-6-phosphate and UDP-GlcNAc. J Mol Graph Model 2017; 78:14-25. [PMID: 28968565 DOI: 10.1016/j.jmgm.2017.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 09/02/2017] [Accepted: 09/05/2017] [Indexed: 11/19/2022]
Abstract
Glucosamine-6-phosphate synthase (EC 2.6.1.16) is responsible for catalysis of the first and practically irreversible step in hexosamine metabolism. The final product of this pathway, uridine 5' diphospho N-acetyl-d-glucosamine (UDP-GlcNAc), is an essential substrate for assembly of bacterial and fungal cell walls. Moreover, the enzyme is involved in phenomenon of hexosamine induced insulin resistance in type II diabetes, which makes of it a potential target for anti-fungal, anti-bacterial and anti-diabetic therapy. The crystal structure of isomerase domain from human pathogenic fungus Candida albicans has been solved recently but it doesn't reveal the molecular mechanism details of inhibition taking place under UDP-GlcNAc influence, the unique feature of eukaryotic enzyme. The following study is a continuation of the previous research based on comparative molecular dynamics simulations of the structures with and without the enzyme's physiological inhibitor (UDP-GlcNAc) bound. The models used for this study included fructose-6-phosphate, one of the enzyme's substrates in its binding pocket. The simulation results studies demonstrated differences in mobility of the compared structures. Some amino acid residues were determined, for which flexibility is evidently different between the models. Importantly, it has been confirmed that the most fixed residues are related to the inhibitor binding process and to the catalysis reaction. The obtained results constitute an important step towards understanding of the inhibition that GlcN-6-P synthase is subjected by UDP-GlcNAc molecule.
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Affiliation(s)
- Aleksandra Miszkiel
- Department of Pharmaceutical Technology and Biochemistry, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Marek Wojciechowski
- Department of Pharmaceutical Technology and Biochemistry, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland.
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20
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Falcón-González JM, Jiménez-Domínguez G, Ortega-Blake I, Carrillo-Tripp M. Multi-Phase Solvation Model for Biological Membranes: Molecular Action Mechanism of Amphotericin B. J Chem Theory Comput 2017; 13:3388-3397. [DOI: 10.1021/acs.jctc.7b00337] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. M. Falcón-González
- Laboratorio
de la Diversidad Biomolecular, Centro de Investigación y de Estudios Avanzados Unidad Monterrey, Vía del Conocimiento 201,
Parque PIIT, C.P. 66600, Apodaca, Nuevo León, México
- Unidad
Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Instituto Politécnico Nacional, Av. Mineral de Valenciana No. 200,
Col. Fraccionamiento Industrial Puerto Interior, C.P. 36275, Silao de la Victoria, Guanajuato, México
| | - G. Jiménez-Domínguez
- Laboratorio
de la Diversidad Biomolecular, Centro de Investigación y de Estudios Avanzados Unidad Monterrey, Vía del Conocimiento 201,
Parque PIIT, C.P. 66600, Apodaca, Nuevo León, México
| | - I. Ortega-Blake
- Instituto
de Ciencias Físicas, Universidad Nacional Autónoma de México, Apartado Postal 48-3, C.P. 62251, Cuernavaca, Morelos, México
| | - M. Carrillo-Tripp
- Laboratorio
de la Diversidad Biomolecular, Centro de Investigación y de Estudios Avanzados Unidad Monterrey, Vía del Conocimiento 201,
Parque PIIT, C.P. 66600, Apodaca, Nuevo León, México
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21
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Scorzoni L, de Paula E Silva ACA, Marcos CM, Assato PA, de Melo WCMA, de Oliveira HC, Costa-Orlandi CB, Mendes-Giannini MJS, Fusco-Almeida AM. Antifungal Therapy: New Advances in the Understanding and Treatment of Mycosis. Front Microbiol 2017; 8:36. [PMID: 28167935 PMCID: PMC5253656 DOI: 10.3389/fmicb.2017.00036] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/06/2017] [Indexed: 01/08/2023] Open
Abstract
The high rates of morbidity and mortality caused by fungal infections are associated with the current limited antifungal arsenal and the high toxicity of the compounds. Additionally, identifying novel drug targets is challenging because there are many similarities between fungal and human cells. The most common antifungal targets include fungal RNA synthesis and cell wall and membrane components, though new antifungal targets are being investigated. Nonetheless, fungi have developed resistance mechanisms, such as overexpression of efflux pump proteins and biofilm formation, emphasizing the importance of understanding these mechanisms. To address these problems, different approaches to preventing and treating fungal diseases are described in this review, with a focus on the resistance mechanisms of fungi, with the goal of developing efficient strategies to overcoming and preventing resistance as well as new advances in antifungal therapy. Due to the limited antifungal arsenal, researchers have sought to improve treatment via different approaches, and the synergistic effect obtained by the combination of antifungals contributes to reducing toxicity and could be an alternative for treatment. Another important issue is the development of new formulations for antifungal agents, and interest in nanoparticles as new types of carriers of antifungal drugs has increased. In addition, modifications to the chemical structures of traditional antifungals have improved their activity and pharmacokinetic parameters. Moreover, a different approach to preventing and treating fungal diseases is immunotherapy, which involves different mechanisms, such as vaccines, activation of the immune response and inducing the production of host antimicrobial molecules. Finally, the use of a mini-host has been encouraging for in vivo testing because these animal models demonstrate a good correlation with the mammalian model; they also increase the speediness of as well as facilitate the preliminary testing of new antifungal agents. In general, many years are required from discovery of a new antifungal to clinical use. However, the development of new antifungal strategies will reduce the therapeutic time and/or increase the quality of life of patients.
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Affiliation(s)
- Liliana Scorzoni
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Ana C A de Paula E Silva
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Caroline M Marcos
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Patrícia A Assato
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Wanessa C M A de Melo
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Haroldo C de Oliveira
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Caroline B Costa-Orlandi
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Maria J S Mendes-Giannini
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
| | - Ana M Fusco-Almeida
- Laboratório de Micologia Clínica, Departamento de Análises Clínicas, Universidade Estadual Paulista (UNESP), Faculdade de Ciências Farmacêuticas Araraquara, Brasil
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22
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Pawlak D, Schielmann M, Wojciechowski M, Andruszkiewicz R. Synthesis and biological activity of novel ester derivatives of N3-(4-metoxyfumaroyl)-(S)-2,3-diaminopropanoic acid containing amide and keto function as inhibitors of glucosamine-6-phosphate synthase. Bioorg Med Chem Lett 2016; 26:3586-9. [DOI: 10.1016/j.bmcl.2016.06.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 11/30/2022]
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23
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Neumann A, Wieczor M, Zielinska J, Baginski M, Czub J. Membrane Sterols Modulate the Binding Mode of Amphotericin B without Affecting Its Affinity for a Lipid Bilayer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3452-3461. [PMID: 27007267 DOI: 10.1021/acs.langmuir.5b04433] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Membrane-active antibiotics are known to selectively target certain pathogens based on cell membrane properties, such as fluidity, lipid ordering, and phase behavior. These are in turn modulated by the composition of a lipid bilayer and in particular by the presence and type of membrane sterols. Amphotericin B (AmB), the golden standard of antifungal treatment, exhibits higher activity toward ergosterol-rich fungal membranes, which permits its use against systemic mycoses; however, the selectivity for fungal membranes is far from satisfactory leading to severe side effects. Despite decades of research, no consensus has emerged on the origin of AmB specificity for fungal cells and its actual mode of action at the molecular level. Previously, it has been proposed that the specific action of AmB is related to differences in its affinity for membranes of different composition. In this work, we investigate this relationship by employing molecular dynamics simulations to compare the free energy of insertion of AmB into three types of membranes: a pure DMPC bilayer and DMPC bilayers containing 30% of cholesterol or ergosterol. We analyze the orientation of AmB molecules within the bilayer in order to unambiguously establish their membrane binding mode and relate the orientational freedom to the sterol-dependent tightness of lipid packing. Our results strongly indicate that the membrane insertion of AmB proceeds virtually to completion independent of membrane type, and hence the higher toxicity against fungal membranes may rather result from differences in subsequent oligomerization in the membrane and assembly of monomers into functional transmembrane pores. In particular, the latter could be facilitated by sterol-induced ordering of AmB molecules along the membrane normal, revealed by our free energy profiles. Moreover--in contrast to certain claims--we find no stable binding mode corresponding to the horizontal adsorption of AmB on the membrane surface.
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Affiliation(s)
| | | | - Joanna Zielinska
- Department of Pharmaceutical Chemistry, Medical University of Gdansk , Gdansk, Poland
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24
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Thermodynamics and kinetics of amphotericin B self-association in aqueous solution characterized in molecular detail. Sci Rep 2016; 6:19109. [PMID: 26742886 PMCID: PMC4705489 DOI: 10.1038/srep19109] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 12/03/2015] [Indexed: 11/09/2022] Open
Abstract
Amphotericin B (AmB) is a potent but toxic drug commonly used to treat systemic mycoses. Its efficiency as a therapeutic agent depends on its ability to discriminate between mammalian and fungal cell membranes. The association of AmB monomers in an aqueous environment plays an important role in drug selectivity, as oligomers formed prior to membrane insertion - presumably dimers - are believed to act differently on fungal (ergosterol-rich) and mammalian (cholesterol-rich) membranes. In this work, we investigate the initial steps of AmB self-association by studying the structural, thermodynamic and spectral properties of AmB dimers in aqueous medium using molecular dynamics simulations. Our results show that in water, the hydrophobic aggregation of AmB monomers yields almost equiprobable populations of parallel and antiparallel dimers that rapidly interconvert into each other, and the dipole-dipole interaction between zwitterionic head groups plays a minor role in determining the drug's tendency for self-aggregation. A simulation of circular dichroism (CD) spectra indicates that in experimental measurements, the signature CD spectrum of AmB aggregates should be attributed to higher-order oligomers rather than dimers. Finally, we suggest that oligomerization can impair the selectivity of AmB molecules for fungal membranes by increasing their hydrophobic drive for non-specific membrane insertion.
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25
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Ramakrishnan J, Rathore SS, Raman T. Review on fungal enzyme inhibitors – potential drug targets to manage human fungal infections. RSC Adv 2016. [DOI: 10.1039/c6ra01577h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The potential applications of enzyme inhibitors for the management of invasive fungal infections are explored.
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Affiliation(s)
- Jayapradha Ramakrishnan
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India-613401
| | - Sudarshan Singh Rathore
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India-613401
| | - Thiagarajan Raman
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India-613401
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26
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Liu Y, Cai DX, Wang L, Li JZ, Wang WN. Glucosamine: fructose-6-phosphate amidotransferase in the white shrimp Litopenaeus vannamei: characterization and regulation under alkaline and cadmium stress. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1754-1764. [PMID: 25956985 DOI: 10.1007/s10646-015-1480-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/30/2015] [Indexed: 06/04/2023]
Abstract
Heavy metal residues and chemical contaminators considered as relevant sources of aquatic environmental pollutants have a generally immunosuppressive effect on aquatic organisms, depressing metabolic activities and immune response. Glutamine: fructose-6-phosphate aminotransferase (GFAT, EC2.6.1.16) is the first, and rate-limiting, enzyme in the hexosamine biosynthetic pathway, and is involved in the regulation of chitin biosynthesis and glycosylation of proteins. We have isolated and characterized GFAT from the white shrimp Litopenaeus vannamei. Amino acid sequence similarity of the Lv-GFAT (L.vannamei-GFAT) was highest to GFATs isolated from insects and mammals (83 % similarity to that of Haemaphysalis longicornis). The open-reading frame of the Lv-GFAT codes for a protein of 41.6 kDa with a calculated isoelectric point of 5.03. RT-PCR assays showed that endogenous Lv-GFAT mRNA is most strongly expressed in the intestine. Further analysis of Lv-GFAT gene expression in hepatopancreas by quantitative real-time PCR demonstrated that Lv-GFAT transcript levels increased when the shrimp were exposed to alkaline pH (9.3) and cadmium stress, but the time when its mRNA expression level peaked differed under these stresses. We also first expressed the recombinant protein of GFAT from shrimps in Escherichia coli. Western blot analyses confirmed that the Lv-GFAT protein was strongly expressed in the hepatopancreas after exposure to the LC-Cd stress. These results suggest that Lv-GFAT expression is stimulated by alkaline pH and cadmium stress and that it may play important roles in resistance of shrimp to environmental stresses.
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Affiliation(s)
- Y Liu
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - D X Cai
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - L Wang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - J Z Li
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - W N Wang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou, 510631, People's Republic of China.
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27
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Synthesis, anticandidal activity of N3-(4-methoxyfumaroyl)-(S)-2,3-diaminopropanoic amide derivatives – Novel inhibitors of glucosamine-6-phosphate synthase. Eur J Med Chem 2015; 90:577-82. [DOI: 10.1016/j.ejmech.2014.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 12/03/2014] [Accepted: 12/04/2014] [Indexed: 11/20/2022]
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28
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Characterization and expression of glucosamine-6-phosphate synthase from Saccharomyces cerevisiae in Pichia pastoris. Biotechnol Lett 2014; 36:2023-8. [DOI: 10.1007/s10529-014-1561-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 05/15/2014] [Indexed: 10/25/2022]
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29
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Boros-Majewska J, Salewska N, Borowski E, Milewski S, Malic S, Wei XQ, Hayes AJ, Wilson MJ, Williams DW. Novel Nystatin A₁ derivatives exhibiting low host cell toxicity and antifungal activity in an in vitro model of oral candidosis. Med Microbiol Immunol 2014; 203:341-55. [PMID: 24924305 DOI: 10.1007/s00430-014-0343-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 05/21/2014] [Indexed: 12/21/2022]
Abstract
Opportunistic oral infections caused by Candida albicans are frequent problems in immunocompromised patients. Management of such infections is limited due to the low number of antifungal drugs available, their relatively high toxicity and the emergence of antifungal resistance. Given these issues, our investigations have focused on novel derivatives of the antifungal antibiotic Nystatin A1, generated by modifications at the amino group of this molecule. The aims of this study were to evaluate the antifungal effectiveness and host cell toxicity of these new compounds using an in vitro model of oral candidosis based on a reconstituted human oral epithelium (RHOE). Initial studies employing broth microdilution, revealed that against planktonic C. albicans, Nystatin A1 had lower minimal inhibitory concentration than novel derivatives. However, Nystatin A1 was also markedly more toxic against human keratinocyte cells. Interestingly, using live/dead staining to assess C. albicans and tissue cell viability after RHOE infection, Nystatin A1 derivatives were more active against Candida with lower toxicity to epithelial cells than the parent drug. Lactate dehydrogenase activity released by the RHOE indicated a fourfold reduction in tissue damage when certain Nystatin derivatives were used compared with Nystatin A1. Furthermore, compared with Nystatin A1, colonisation of the oral epithelium by C. albicans was notably reduced by the new polyenes. In the absence of antifungal agents, confocal laser scanning microscopy showed that C. albicans extensively invaded the RHOE. However, the presence of the novel derivatives greatly reduced or totally prevented this fungal invasion.
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Affiliation(s)
- Joanna Boros-Majewska
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology (GUT), 11/12 Narutowicza Street, 80-233, Gdańsk, Poland
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30
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The effect of sterols on amphotericin B self-aggregation in a lipid bilayer as revealed by free energy simulations. Biophys J 2013; 104:1485-94. [PMID: 23561525 DOI: 10.1016/j.bpj.2013.02.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 02/15/2013] [Accepted: 02/20/2013] [Indexed: 11/23/2022] Open
Abstract
Amphotericin B (AmB) is an effective but toxic antifungal drug, known to increase the permeability of the cell membrane, presumably by assembling into transmembrane pores in a sterol-dependent manner. The aggregation of AmB molecules in a phospholipid bilayer is, thus, crucial for the drug's activity. To provide an insight into the molecular nature of this process, here, we report an atomistic molecular dynamics simulation study of AmB head-to-head dimerization in a phospholipid bilayer, a possible early stage of aggregation. To compare the effect of sterols on the thermodynamics of aggregation and the architecture of the resulting AmB-AmB complexes, free energy profiles for the dimerization in ergosterol- or cholesterol-containing and sterol-free membranes are derived from the simulations. These profiles demonstrate that although AmB dimers are formed in all the systems studied, they are significantly less favorable in the bilayer with ergosterol than in the cholesterol-containing or sterol-free ones. We investigate the structural and energetic determinants of this difference and discuss its consequences for the AmB mechanism of action.
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31
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Structure-antifungal activity relationships of polyene antibiotics of the amphotericin B group. Antimicrob Agents Chemother 2013; 57:3815-22. [PMID: 23716057 DOI: 10.1128/aac.00270-13] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A comprehensive comparative analysis of the structure-antifungal activity relationships for the series of biosynthetically engineered nystatin analogues and their novel semisynthetic derivatives, as well as amphotericin B (AMB) and its semisynthetic derivatives, was performed. The data obtained revealed the significant influence of the structure of the C-7 to C-10 polyol region on the antifungal activity of these polyene antibiotics. Comparison of positions of hydroxyl groups in the antibiotics and in vitro antifungal activity data showed that the most active are the compounds in which hydroxyl groups are in positions C-8 and C-9 or positions C-7 and C-10. Antibiotics with OH groups at both C-7 and C-9 had the lowest activity. The replacement of the C-16 carboxyl with methyl group did not significantly affect the in vitro antifungal activity of antibiotics without modifications at the amino group of mycosamine. In contrast, the activity of the N-modified derivatives was modulated both by the presence of CH3 or COOH group in the position C-16 and by the structure of the modifying substituent. The most active compounds were tested in vivo to determine the maximum tolerated doses and antifungal activity on the model of candidosis sepsis in leukopenic mice (cyclophosphamide-induced). Study of our library of semisynthetic polyene antibiotics led to the discovery of compounds, namely, N-(L-lysyl)-BSG005 (compound 3n) and, especially, L-glutamate of 2-(N,N-dimethylamino)ethyl amide of S44HP (compound 2j), with high antifungal activity that were comparable in in vitro and in vivo tests to AMB and that have better toxicological properties.
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32
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Vijesh A, Isloor AM, Telkar S, Arulmoli T, Fun HK. Molecular docking studies of some new imidazole derivatives for antimicrobial properties. ARAB J CHEM 2013. [DOI: 10.1016/j.arabjc.2011.10.007] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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33
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Efficient synthesis and anti-fungal activity of oleanolic acid oxime esters. Molecules 2013; 18:3615-29. [PMID: 23519202 PMCID: PMC6270060 DOI: 10.3390/molecules18033615] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 03/14/2013] [Accepted: 03/15/2013] [Indexed: 11/28/2022] Open
Abstract
In order to develop potential glucosamine-6-phosphate synthase inhibitors and anti-fungal agents, twenty five oleanolic acid oxime esters were synthesized in an efficient way. The structures of the new compounds were confirmed by MS, HRMS, 1H-NMR and 13C-NMR. Preliminary studies based on means of the Elson-Morgan method indicated that many compounds exhibited some inhibitory activity of glucosamine-6-phosphate synthase (GlmS), and the original fungicidal activities results showed that some of the compounds exhibited good fungicidal activities towards Sclerotinia sclerotiorum (Lib.) de Bary, Rhizoctonia solani Kuhn and Botrytis cinerea Pers at the concentration of 50 µg/mL. These compounds would thus merit further study and development as antifungal agents.
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34
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Czarnecka J, Kwiatkowska K, Gabriel I, Wojciechowski M, Milewski S. EngineeringCandida albicansglucosamine-6-phosphate synthase for efficient enzyme purification. J Mol Recognit 2012; 25:564-70. [DOI: 10.1002/jmr.2175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Justyna Czarnecka
- Department of Pharmaceutical Technology and Biochemistry; Gdańsk University of Technology; 11/12 Narutowicza St; 80-233; Gdańsk; Poland
| | - Karolina Kwiatkowska
- Department of Pharmaceutical Technology and Biochemistry; Gdańsk University of Technology; 11/12 Narutowicza St; 80-233; Gdańsk; Poland
| | - Iwona Gabriel
- Department of Pharmaceutical Technology and Biochemistry; Gdańsk University of Technology; 11/12 Narutowicza St; 80-233; Gdańsk; Poland
| | - Marek Wojciechowski
- Department of Pharmaceutical Technology and Biochemistry; Gdańsk University of Technology; 11/12 Narutowicza St; 80-233; Gdańsk; Poland
| | - Sławomir Milewski
- Department of Pharmaceutical Technology and Biochemistry; Gdańsk University of Technology; 11/12 Narutowicza St; 80-233; Gdańsk; Poland
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Jędrzejczak R, Wojciechowski M, Andruszkiewicz R, Sowiński P, Kot-Wasik A, Milewski S. Inactivation of glucosamine-6-phosphate synthase by N3-oxoacyl derivatives of L-2,3-diaminopropanoic acid. Chembiochem 2012; 13:85-96. [PMID: 22125025 DOI: 10.1002/cbic.201100587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Indexed: 11/09/2022]
Abstract
N(3)-Oxoacyl derivatives of L-2,3-diaminopropanoic acid 1-4, containing either an epoxide group or a conjugated double bond system, inactivate Saccharomyces cerevisiae glucosamine-6-phosphate (GlcN-6-P) synthase in a time- and concentration dependent manner. The results of kinetics studies on inactivation suggested a biphasic course, with formation of the enzyme-ligand complex preceding irreversible modification of the enzyme. The examined compounds differed markedly in their affinity to the enzyme active site. Inhibitors containing a phenyl ketone moiety bound much more strongly than their methyl ketone counterparts. The molecular mechanism of enzyme inactivation by phenyl ketone compounds 1 and 3 was elucidated by using a stepwise approach with 2D NMR, MS and UV-visible spectroscopy. A substituted thiazine derivative was identified as the final product of a model reaction between an epoxide compound, 1, and L-cysteine ethyl ester (CEE); and the respective cyclic product, found as a result of reaction between 1 and CGIF tetrapeptide, was identical to the N-terminal fragment of GlcN-6-P synthase. On the other hand, the reaction of a double-bond-containing compound, 3, with CEE, CGIF and GlcN-6-P synthase led to the formation of a C-S bond, without any further conversion or rearrangement. Molecular mechanisms of the reactions studied are proposed.
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Affiliation(s)
- Robert Jędrzejczak
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology, Gdańsk, Poland
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36
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Koszel D, Łącka I, Kozłowska-Tylingo K, Andruszkiewicz R. The synthesis and biological activity of lipophilic derivatives of bicine conjugated with N3-(4-methoxyfumaroyl)-L-2,3-diaminopropanoic acid (FMDP)—an inhibitor of glucosamine-6-phosphate synthase. J Enzyme Inhib Med Chem 2011; 27:167-73. [DOI: 10.3109/14756366.2011.582039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Dominik Koszel
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology,
Gdańsk, Poland
| | - Izabela Łącka
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology,
Gdańsk, Poland
| | | | - Ryszard Andruszkiewicz
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology,
Gdańsk, Poland
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37
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Long range molecular dynamics study of regulation of eukaryotic glucosamine-6-phosphate synthase activity by UDP-GlcNAc. J Mol Model 2011; 17:3103-15. [PMID: 21360186 PMCID: PMC3224219 DOI: 10.1007/s00894-011-1003-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Accepted: 01/28/2011] [Indexed: 11/08/2022]
Abstract
Glucosamine-6-phosphate (GlcN-6-P) synthase catalyses the first and practically irreversible step in hexosamine metabolism. The final product of this pathway, uridine 5’ diphospho N-acetyl-D-glucosamine (UDP-GlcNAc), is an essential substrate for assembly of bacterial and fungal cell walls. Moreover, the enzyme is involved in phenomenon of hexosamine induced insulin resistance in type II diabetes, which makes it a potential target for antifungal, antibacterial and antidiabetic therapy. The crystal structure of the isomerase domain of GlcN-6-P synthase from human pathogenic fungus Candida albicans, in complex with UDP-GlcNAc has been solved recently but it has not revealed the molecular mechanism of inhibition taking place under UDP-GlcNAc influence, the unique feature of the eukaryotic enzyme. UDP-GlcNAc is a physiological inhibitor of GlcN-6-P synthase, binding about 1 nm away from the active site of the enzyme. In the present work, comparative molecular dynamics simulations of the free and UDP-GlcNAc-bounded structures of GlcN-6-P synthase have been performed. The aim was to complete static X-ray structural data and detect possible changes in the dynamics of the two structures. Results of the simulation studies demonstrated higher mobility of the free structure when compared to the liganded one. Several amino acid residues were identified, flexibility of which is strongly affected upon UDP-GlcNAc binding. Importantly, the most fixed residues are those related to the inhibitor binding process and to the catalytic reaction. The obtained results constitute an important step toward understanding of mechanism of GlcN-6-P synthase inhibition by UDP-GlcNAc molecule.
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38
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Mouilleron S, Badet-Denisot MA, Badet B, Golinelli-Pimpaneau B. Dynamics of glucosamine-6-phosphate synthase catalysis. Arch Biochem Biophys 2010; 505:1-12. [PMID: 20709015 DOI: 10.1016/j.abb.2010.08.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Revised: 08/06/2010] [Accepted: 08/08/2010] [Indexed: 11/19/2022]
Abstract
Glucosamine-6P synthase, which catalyzes glucosamine-6P synthesis from fructose-6P and glutamine, channels ammonia over 18Å between its glutaminase and synthase active sites. The crystal structures of the full-length Escherichia coli enzyme have been determined alone, in complex with the first bound substrate, fructose-6P, in the presence of fructose-6P and a glutamine analog, and in the presence of the glucosamine-6P product. These structures represent snapshots of reaction intermediates, and their comparison sheds light on the dynamics of catalysis. Upon fructose-6P binding, the C-terminal loop and the glutaminase domains get ordered, leading to the closure of the synthase site, the opening of the sugar ring and the formation of a "closed" ammonia channel. Then, glutamine binding leads to the closure of the Q-loop to protect the glutaminase site, the activation of the catalytic residues involved in glutamine hydrolysis, the swing of the side chain of Trp74, which allows the communication between the two active sites through an "open" channel, and the rotation of the glutaminase domains relative to the synthase domains dimer. Therefore, binding of the substrates at the appropriate reaction time is responsible for the formation and opening of the ammonia channel and for the activation of the enzyme glutaminase function.
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Affiliation(s)
- Stéphane Mouilleron
- Laboratoire d'Enzymologie et Biochimie Structurales, CNRS, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
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39
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Valerio-Lepiniec M, Aumont-Nicaise M, Roux C, Raynal B, England P, Badet B, Badet-Denisot MA, Desmadril M. Analysis of the Escherichia coli glucosamine-6-phosphate synthase activity by isothermal titration calorimetry and differential scanning calorimetry. Arch Biochem Biophys 2010; 498:95-104. [PMID: 20416269 DOI: 10.1016/j.abb.2010.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 04/14/2010] [Accepted: 04/14/2010] [Indexed: 11/25/2022]
Abstract
Glucosamine-6-phosphate synthase (GlmS) is responsible for the first and rate-limiting step in the hexosamine biosynthetic pathway. It catalyzes the conversion of D-fructose-6P (F6P) into D-glucosamine-6P (GlcN6P) using L-glutamine (Gln) as nitrogen donor (synthase activity) according to an ordered bi-bi process where F6P binds first. In the absence of F6P, the enzyme exhibits a weak hydrolyzing activity of Gln into Glu and ammonia (glutaminase activity), whereas the presence of F6P strongly stimulates it (hemi-synthase activity). Until now, these different activities were indirectly measured using either coupled enzyme or colorimetric methods. In this work, we have developed a direct assay monitoring the heat released by the reaction. Isothermal titration calorimetry and differential scanning calorimetry were used to determine kinetic and thermodynamic parameters of GlmS. The direct determination at 37 degrees C of kinetic parameters and affinity constants for both F6P and Gln demonstrated that part of the ammonia produced by Gln hydrolysis in the presence of both substrates is not used for the formation of the GlcN6P. The full characterization of this phenomenon allowed to identify experimental conditions where this leak of ammonia is negligible. Enthalpy measurements at 25 degrees C in buffers of various heats of protonation demonstrated that no proton exchange with the medium occurred during the enzyme-catalyzed glutaminase or synthase reaction suggesting for the first time that both products are released as a globally neutral pair composed by the Glu carboxylic side chain and the GlcN6P amine function. Finally we showed that the oligomerization state of GlmS is concentration-dependent.
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Affiliation(s)
- Marie Valerio-Lepiniec
- Institut de Biochimie et Biophysique Moléculaire et Cellulaire, UMR 8619, Université de Paris-Sud 11, Orsay, France.
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40
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Neumann A, Czub J, Baginski M. On the possibility of the amphotericin B-sterol complex formation in cholesterol- and ergosterol-containing lipid bilayers: a molecular dynamics study. J Phys Chem B 2010; 113:15875-85. [PMID: 19929013 DOI: 10.1021/jp905133f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amphotericin B (AmB) is a well-known membrane-active antibiotic that has been used to treat systemic fungal infections for more than 45 years. Therapeutic application of AmB is based on the fact that it is more active against ergosterol-containing membranes of fungal cells than against mammalian membranes with cholesterol. In this paper, we examine the hypothesis according to which the selectivity of the AmB's membrane action originates from its different ability to form the binary complexes with the relevant sterols. To this end, molecular dynamics simulations were performed for systems containing the preformed models of AmB/sterol complexes embedded in lipid bilayers containing either cholesterol or ergosterol. The initial structures of the studied binary associates were selected on the basis of a systematic scan of all possible mutual positions and orientations of the two molecules. The results obtained demonstrate that in general the complexes with ergosterol are more stable on the 100 ns time scale. Furthermore, on the basis of motional correlation analysis, taking into account the effects of lipid environment, we propose that, within the sterol-enriched liquid-ordered membrane phases, AmB molecules exhibit a greater tendency to bind ergosterol than cholesterol. The analysis of the interactions suggests that this affinity difference is of enthalpic origin and may arise from the considerable difference in the energy of the van der Waals interactions between AmB and the two types of sterols. Thus, our current results: (i) support the hypothesis that binary AmB/sterol complexes form within a lipid membrane and (ii) suggest that the higher toxicity may at least partly be attributed to the higher affinity of AmB for ergosterol than for cholesterol within a lipid membrane environment.
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Affiliation(s)
- Anna Neumann
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St. 11/12, 80-233 Gdansk, Poland
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41
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Preobrazhenskaya MN, Olsufyeva EN, Solovieva SE, Tevyashova AN, Reznikova MI, Luzikov YN, Terekhova LP, Trenin AS, Galatenko OA, Treshalin ID, Mirchink EP, Bukhman VM, Sletta H, Zotchev SB. Chemical modification and biological evaluation of new semisynthetic derivatives of 28,29-Didehydronystatin A1 (S44HP), a genetically engineered antifungal polyene macrolide antibiotic. J Med Chem 2009; 52:189-96. [PMID: 19055412 DOI: 10.1021/jm800695k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twenty-three new derivatives of the heptaene nystatin analogue 28,29-didehydronystatin A(1) (1) (S44HP) were obtained by chemical modification of C16 carboxyl and amino groups of mycosamine. These derivatives comprised 15 carboxamides, 4 N-alkyl derivatives, 3 N-derivatives containing additional N-linked monosaccharide or disaccharide moiety (products of Amadori rearrangement), and 1 N-aminoacyl derivative. The derivatives have been tested in vitro against yeasts Candida albicans, Cryptococcus humicolus, and filamentous fungi (molds) Aspergillus niger and Fusarum oxysporum, as well as for hemolytic activity against human erythrocytes. Structure-activity relationships for the compounds obtained are discussed. The most active and least hemolytic derivative 3-(N,N-dimethylamino)propylamide of S44HP (6) was tested for acute toxicity and antifungal activity in animal model. Whereas amphotericin B and S44HP were active in vivo at doses close to the maximal tolerated dose, 6 was considerably less toxic and more active compared to these two antibiotics.
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42
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Brautaset T, Sletta H, Nedal A, Borgos SEF, Degnes KF, Bakke I, Volokhan O, Sekurova ON, Treshalin ID, Mirchink EP, Dikiy A, Ellingsen TE, Zotchev SB. Improved antifungal polyene macrolides via engineering of the nystatin biosynthetic genes in Streptomyces noursei. ACTA ACUST UNITED AC 2009; 15:1198-206. [PMID: 19022180 DOI: 10.1016/j.chembiol.2008.08.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2008] [Revised: 08/08/2008] [Accepted: 08/14/2008] [Indexed: 11/30/2022]
Abstract
Seven polyene macrolides with alterations in the polyol region and exocyclic carboxy group were obtained via genetic engineering of the nystatin biosynthesis genes in Streptomyces noursei. In vitro analyses of the compounds for antifungal and hemolytic activities indicated that combinations of several mutations caused additive improvements in their activity-toxicity properties. The two best analogs selected on the basis of in vitro data were tested for acute toxicity and antifungal activity in a mouse model. Both analogs were shown to be effective against disseminated candidosis, while being considerably less toxic than amphotericin B. To our knowledge, this is the first report on polyene macrolides with improved in vivo pharmacological properties obtained by genetic engineering. These results indicate that the engineered nystatin analogs can be further developed into antifungal drugs for human use.
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Affiliation(s)
- Trygve Brautaset
- Department of Biotechnology, SINTEF Materials and Chemistry, N-7034 Trondheim, Norway
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43
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Czub J, Neumann A, Borowski E, Baginski M. Influence of a lipid bilayer on the conformational behavior of amphotericin B derivatives - A molecular dynamics study. Biophys Chem 2009; 141:105-16. [PMID: 19185412 DOI: 10.1016/j.bpc.2009.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2008] [Revised: 01/02/2009] [Accepted: 01/04/2009] [Indexed: 11/28/2022]
Abstract
Amphotericin B (AmB) is an effective but very toxic antifungal antibiotic. In our laboratory a series of AmB derivatives of improved selectivity of action was synthesized and tested. To understand molecular basis of this improvement, comparative conformational studies of amphotericin B and its two more selective derivatives were carried out in an aqueous solution and in a lipid membrane. These molecular simulation studies revealed that within a membrane environment the conformational behavior of the derivatives differs significantly from the one observed for the parent molecule. Possible reasons for such a difference are analyzed. Furthermore, we hypothesize that the observed conformational transition within the polar head of AmB derivatives may lead to destabilization of antibiotic-induced transmembrane channels. Consequently, the selective toxicity of the derivatives should increase as ergosterol-rich liquid-ordered domains are more rigid and conformationally ordered than their cholesterol-containing counterparts, and as such may better support less stable channel structure.
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Affiliation(s)
- Jacek Czub
- Department of Pharmaceutical Technology and Biochemistry, Gdansk University of Technology, Poland
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44
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Nakaishi Y, Bando M, Shimizu H, Watanabe K, Goto F, Tsuge H, Kondo K, Komatsu M. Structural analysis of human glutamine:fructose-6-phosphate amidotransferase, a key regulator in type 2 diabetes. FEBS Lett 2008; 583:163-7. [PMID: 19059404 DOI: 10.1016/j.febslet.2008.11.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2008] [Revised: 11/10/2008] [Accepted: 11/13/2008] [Indexed: 01/17/2023]
Abstract
Glutamine:fructose-6-phosphate amidotransferase (GFAT) is a rate-limiting enzyme in the hexoamine biosynthetic pathway and plays an important role in type 2 diabetes. We now report the first structures of the isomerase domain of the human GFAT in the presence of cyclic glucose-6-phosphate and linear glucosamine-6-phosphate. The C-terminal tail including the active site displays a rigid conformation, similar to the corresponding Escherichia coli enzyme. The diversity of the CF helix near the active site suggests the helix is a major target for drug design. Our study provides insights into the development of therapeutic drugs for type 2 diabetes.
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Affiliation(s)
- Yuichiro Nakaishi
- Medicinal Chemistry Research Institute, Otsuka Pharmaceutical Co. Ltd., Kawauchi-cho, Tokushima, Japan.
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45
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Andruszkiewicz R, Zieniawa T, Walkowiak A. Anticandidal properties of N-acylpeptides containing an inhibitor of glucosamine-6-phosphate synthase. J Enzyme Inhib Med Chem 2008; 20:115-21. [PMID: 15968815 DOI: 10.1080/14756360400009317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
A series of N-acyl peptides 1-9, containing an inhibitor of glucosamine-6-phosphate synthase have been synthesised and tested against Candida strains. N-Acylated peptides inhibit glucosamine-6-phosphate synthase in cell free extracts from Candida albicans. Antifungal activities of the tested compounds correlated with their lipophilic properties. Peptides acylated with decanoic acid were found to be the most potent in the series. N-decanoylpeptides also showed activity against Candida albicans Gu5 resistant mutant with Cdr1 and Cdr2 drug extrusion proteins that causes MDR by an active efflux mechanism.
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Affiliation(s)
- Ryszard Andruszkiewicz
- Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology, 11/12 Narutowicza Street, 80-952 Gdańsk, Poland.
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46
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Durand P, Golinelli-Pimpaneau B, Mouilleron S, Badet B, Badet-Denisot MA. Highlights of glucosamine-6P synthase catalysis. Arch Biochem Biophys 2008; 474:302-17. [PMID: 18279655 DOI: 10.1016/j.abb.2008.01.026] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Revised: 01/30/2008] [Accepted: 01/31/2008] [Indexed: 10/22/2022]
Abstract
L-Glutamine:d-fructose-6-phosphate amidotransferase, also known as glucosamine-6-phosphate synthase (GlcN6P synthase), which catalyzes the first step in a pathway leading to the formation of uridine 5'-diphospho-N-acetyl-d-glucosamine (UDP-GlcNAc), is a key point in the metabolic control of the biosynthesis of amino sugar-containing macromolecules. The molecular mechanism of the reaction catalyzed by GlcN6P synthase is complex and involves amide bond cleavage followed by ammonia channeling and sugar isomerization. This article provides a comprehensive overview of the present knowledge on this multi-faceted enzyme emphasizing the progress made during the last five years.
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Affiliation(s)
- Philippe Durand
- Institut de Chimie des Substances Naturelles-CNRS, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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47
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Melcer A, Łącka I, Gabriel I, Wojciechowski M, Liberek B, Wiśniewski A, Milewski S. Rational design of N-alkyl derivatives of 2-amino-2-deoxy-d-glucitol-6P as antifungal agents. Bioorg Med Chem Lett 2007; 17:6602-6. [DOI: 10.1016/j.bmcl.2007.09.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Revised: 09/13/2007] [Accepted: 09/18/2007] [Indexed: 10/22/2022]
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48
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Czub J, Borowski E, Baginski M. Interactions of amphotericin B derivatives with lipid membranes—A molecular dynamics study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:2616-26. [PMID: 17662232 DOI: 10.1016/j.bbamem.2007.06.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 06/15/2007] [Accepted: 06/15/2007] [Indexed: 11/21/2022]
Abstract
Amphotericin B (AmB) is a well-known polyene macrolide antibiotic used to treat systemic fungal infections. AmB targets more efficiently fungal than animal membranes. However, there are only minor differences in the mode of action of AmB against both types of membranes, which is a source of AmB toxicity. In this work, we analyzed interactions of two low toxic derivatives of AmB (SAmE and PAmE), synthesized in our laboratory, with lipid membranes. Molecular dynamics simulations of the lipid bilayers containing ergosterol (fungal cells) or cholesterol (animal cells) and the studied antibiotic molecules were performed to compare the structural and dynamic properties of AmB derivatives and the parent drug inside the membrane. A number of differences was found for AmB and its derivatives' behavior in cholesterol- and ergosterol-containing membranes. We found that PAmE and SAmE can penetrate deeper into the hydrophobic region of the membrane compared to AmB. Modification of the amino and carboxyl group of AmB also resulted in the conformational transition within the antibiotic's polar head. Wobbling dynamics differentiation, depending on the sterol present, was discovered for the AmB derivatives. These differences may be interpreted as molecular factors responsible for the improved selectivity observed macroscopically for the studied AmB derivatives.
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Affiliation(s)
- Jacek Czub
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-952 Gdansk, Poland
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49
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Czub J, Baginski M. Modulation of amphotericin B membrane interaction by cholesterol and ergosterol--a molecular dynamics study. J Phys Chem B 2007; 110:16743-53. [PMID: 16913814 DOI: 10.1021/jp061916g] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amphotericin B (AmB) is a well-known polyene macrolide antibiotic used to treat systemic fungal infections. According to a well-documented hypothesis, molecules of AmB form ionic membrane channels that are responsible for chemotherapeutic action. These channels disturb the barrier function of the cell membrane which, in consequence, leads to cell death. The presence of sterols in the cell membrane is necessary for full manifestation of the antibiotic's ionophoric activity, at least in vivo. Ergosterol-containing fungal membranes are targeted more efficiently by AmB than mammalian membranes containing cholesterol. However, a similar level of disturbance of fungal and mammalian membranes is responsible for serious toxicity of the antibiotic. Due to the importance of AmB and lack of better antifungal alternatives, the search for new less toxic derivatives of this antibiotic still continues. Therefore, studies of the AmB-membrane interaction are very important. The present work constitutes a continuation of a broad program of study on AmB mode of action in our group. In particular, molecular dynamics simulations of AmB monomers inside the bilayers of three different compositions (pure dimiristoylphosphatidylcholine (DMPC) and DMPC bilayer containing approximately 25 mol % of cholesterol or ergosterol) were carried out. In general, analysis of generated trajectories resulted in identifying many significant differences in the behavior of AmB monomers depending on the membrane environment. In particular, it was established that the antibiotic increases the internal order of DMPC bilayer containing 25 mol % of cholesterol, while it has no effect on the order of the bilayer with the same amount of ergosterol. Performed calculations also revealed that relatively rigid and elongated AmB molecules exhibit higher affinity toward the sterol-containing lo phases and, therefore, may be cumulated in ordered membrane domains (e.g., lipid rafts). Since the partition coefficient between the ld and lo phase appears to be greater in the case of the ergosterol- compared to cholesterol-containing membrane, this effect can be also discussed as the possible origin of AmB-selective toxicity and indirect sterol involvement in expression of AmB activity.
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Affiliation(s)
- Jacek Czub
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-952 Gdansk, Poland
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50
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Li Y, Lopez P, Durand P, Ouazzani J, Badet B, Badet-Denisot MA. An enzyme-coupled assay for amidotransferase activity of glucosamine-6-phosphate synthase. Anal Biochem 2007; 370:142-6. [PMID: 17880906 DOI: 10.1016/j.ab.2007.07.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 07/25/2007] [Accepted: 07/31/2007] [Indexed: 11/17/2022]
Abstract
An assay for glucosamine-6-phosphate synthase using a yeast glucosamine-6-phosphate N-acetyltransferase 1 (GNA1) as coupling enzyme was developed. GNA1 transfers the acetyl moiety from acetyl-coenzyme A (CoA) to glucosamine-6-phosphate, releasing coenzyme A. The assay measures the production of glucosamine-6-phosphate by either following the consumption of acetyl-CoA spectrophotometrically at 230nm or quantifying the free thiol with 5,5'-dithio-bis(2-nitrobenzoic acid) (Ellman's reagent) in a discontinuous manner. This method is simple to perform and can be adapted to a 96-well microtiter plate format, which will facilitate high-throughput inhibitor screening and mechanistic studies using purified GlmS.
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Affiliation(s)
- Yanyan Li
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-Sur-Yvette, France
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