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Youssef MS, Ahmed SI, Mohamed IMA, Abdel-Kareem MM. Biosynthesis, Spectrophotometric Follow-Up, Characterization, and Variable Antimicrobial Activities of Ag Nanoparticles Prepared by Edible Macrofungi. Biomolecules 2023; 13:1102. [PMID: 37509137 PMCID: PMC10377419 DOI: 10.3390/biom13071102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/05/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
The biosynthesis of silver nanoparticles (Ag NPs) could play a significant role in the development of commercial antimicrobials. Herein, the biosynthesis of Ag NPs was studied using the edible mushroom Pleurotus floridanus, and following its formation, spectrophotometry was used to detect the best mushroom content, pH, temperature, and silver concentration. After that, the morphology was described via transmission electron microscopy (TEM), and nanoscale-size particles were found ranging from 11 to 13 nm. The best conditions of Ag content and pH were found at 1.0 mM and 11.0, respectively. In addition, the best mushroom extract concentration was found at 30 g/L. According to XRD analysis, the crystal structure of the formed amorphous Ag NPs is cubic with a space group of fm-3m and a space group number of 225. After that, the function groups at the surface of the prepared Ag NPs were studied via FTIR analysis, which indicated the presence of C=O, C-H, and O-H groups. These groups could indicate the presence of mushroom traces in the Ag NPs, which was confirmed via the amorphous characteristics of Ag NPs from the XRD analysis. The prepared Ag NPs have a high impact against different microorganisms, which could be attributed to the ability of Ag NPs to penetrate the cell bacterial wall.
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Affiliation(s)
- Mohamed S Youssef
- Botany and Microbiology Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Sanaa Ibrahim Ahmed
- Botany and Microbiology Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Ibrahim M A Mohamed
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Marwa M Abdel-Kareem
- Botany and Microbiology Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
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Xu ZZ, Zhuang Z, Cai R, Lin GQ, She Z, Zhao Q, He QL. Hydroxylation with Unusual Stereoinversion Catalyzed by an Fe II /2-OG Dependent Oxidase and 3,6-Diene-2,5-diketopiperazine Formation in the Biosynthesis of Brevianamide K. Angew Chem Int Ed Engl 2023; 62:e202216989. [PMID: 36750406 DOI: 10.1002/anie.202216989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 02/09/2023]
Abstract
Natural products with the 3,6-diene-2,5-diketopiperazine core are widely distributed in nature; however, the biosynthetic mechanism of 3,6-diene-2,5-diketopiperazine in fungi remains to be further elucidated. Through heterologous expression and biochemical investigation of an FeII /2-oxoglutarate-dependent oxidase (AspE) and a heme-dependent P450 enzyme (AspF), we report that AspE, AspF and subsequent dehydration account for the formation of the 3,6-diene-2,5-diketopiperazine substructure of brevianamide K from Aspergillus sp. SK-28, a symbiotic fungus of mangrove plant Kandelia candel. More interestingly, in-depth investigation of the enzymatic mechanism showed that AspE promotes hydroxylation of brevianamide Q with unprecedented stereoinversion through hydrogen atom abstraction and water nucleophilic attack from the opposite face of the resultant iminium cation intermediate.
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Affiliation(s)
- Zhuo-Zheng Xu
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
| | - Zheng Zhuang
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
| | - Runlin Cai
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Guo-Qiang Lin
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
| | - Zhigang She
- School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Qunfei Zhao
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
| | - Qing-Li He
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
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Tao H, Ushimaru R, Awakawa T, Mori T, Uchiyama M, Abe I. Stereoselectivity and Substrate Specificity of the Fe(II)/α-Ketoglutarate-Dependent Oxygenase TqaL. J Am Chem Soc 2022; 144:21512-21520. [DOI: 10.1021/jacs.2c08116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Hui Tao
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Richiro Ushimaru
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-0033, Japan
- ACT-X, Japan Science and Technology Agency (JST), Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Takayoshi Awakawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-0033, Japan
- RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Takahiro Mori
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-0033, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- Research Initiative for Supra-Materials (RISM), Shinshu University, Ueda 386-8567, Japan
| | - Ikuro Abe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-0033, Japan
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Parkinson EI, Lakkis HG, Alwali AA, Metcalf MEM, Modi R, Metcalf WW. An Unusual Oxidative Rearrangement Catalyzed by a Divergent Member of the 2-Oxoglutarate-Dependent Dioxygenase Superfamily during Biosynthesis of Dehydrofosmidomycin. Angew Chem Int Ed Engl 2022; 61:e202206173. [PMID: 35588368 PMCID: PMC9296572 DOI: 10.1002/anie.202206173] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Indexed: 12/20/2022]
Abstract
The biosynthesis of the natural product dehydrofosmidomycin involves an unusual transformation in which 2-(trimethylamino)ethylphosphonate is rearranged, desaturated and demethylated by the enzyme DfmD, a divergent member of the 2-oxoglutarate-dependent dioxygenase superfamily. Although other members of this enzyme family catalyze superficially similar transformations, the combination of all three reactions in a single enzyme has not previously been observed. By characterizing the products of in vitro reactions with labeled and unlabeled substrates, we show that DfmD performs this transformation in two steps, with the first involving desaturation of the substrate to form 2-(trimethylamino)vinylphosphonate, and the second involving rearrangement and demethylation to form methyldehydrofosmidomycin. These data reveal significant differences from the desaturation and rearrangement reactions catalyzed by other family members.
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Affiliation(s)
- Elizabeth I. Parkinson
- Institute for Genomic BiologyUniversity of Illinois at Urbana-Champaign1206 W. Gregory Dr.UrbanaIL 61801USA
- Department of ChemistryPurdue UniversityHerbert C. Brown Laboratory of Chemistry, Room 4103E560 Oval Drive, Box 59West LafayetteIN 47907USA
- Department of Medicinal Chemistry and Molecular PharmacologyPurdue UniversityHerbert C. Brown Laboratory of Chemistry, Room 4103E560 Oval Drive, Box 59West LafayetteIN 47907USA
| | - Hani G. Lakkis
- Department of ChemistryPurdue UniversityHerbert C. Brown Laboratory of Chemistry, Room 4103E560 Oval Drive, Box 59West LafayetteIN 47907USA
| | - Amir A. Alwali
- Department of ChemistryPurdue UniversityHerbert C. Brown Laboratory of Chemistry, Room 4103E560 Oval Drive, Box 59West LafayetteIN 47907USA
| | - Mary Elizabeth M. Metcalf
- Institute for Genomic BiologyUniversity of Illinois at Urbana-Champaign1206 W. Gregory Dr.UrbanaIL 61801USA
- Department of MicrobiologyUniversity of Illinois at Urbana-Champaign, B103C&LSL601 S. GoodwinUrbanaIL 61801USA
| | - Ramya Modi
- Department of ChemistryPurdue UniversityHerbert C. Brown Laboratory of Chemistry, Room 4103E560 Oval Drive, Box 59West LafayetteIN 47907USA
| | - William W. Metcalf
- Institute for Genomic BiologyUniversity of Illinois at Urbana-Champaign1206 W. Gregory Dr.UrbanaIL 61801USA
- Department of MicrobiologyUniversity of Illinois at Urbana-Champaign, B103C&LSL601 S. GoodwinUrbanaIL 61801USA
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Parkinson EI, Lakkis HG, Alwali AA, Metcalf MEM, Modi R, Metcalf WW. An Unusual Oxidative Rearrangement Catalyzed by a Divergent Member of the 2‐Oxoglutarate‐Dependent Dioxygenase Superfamily during Biosynthesis of Dehydrofosmidomycin. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Ramya Modi
- Purdue University Chemistry UNITED STATES
| | - William W. Metcalf
- University of Illinois Urbana-Champaign Microbiology 601 S. GoodwinB103 CLSL 61801 Urbana UNITED STATES
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