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Kim JY, Kang J, Cha S, Kim H, Kim D, Kang H, Choi I, Kim M. Stability of Zr-Based UiO-66 Metal-Organic Frameworks in Basic Solutions. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:110. [PMID: 38202565 PMCID: PMC10780619 DOI: 10.3390/nano14010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/21/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024]
Abstract
Although Zr-based metal-organic frameworks (MOFs) exhibit robust chemical and physical stability in the presence of moisture and acidic conditions, their susceptibility to nucleophilic attacks from bases poses a critical challenge to their overall stability. Herein, we systematically investigate the stability of Zr-based UiO-66 (UiO = University of Oslo) MOFs in basic solutions. The impact of 11 standard bases, including inorganic salts and organic bases, on the stability of these MOFs is examined. The destruction of the framework is confirmed through powder X-ray diffraction (PXRD) patterns, and the monitored dissolution of ligands from the framework is assessed using nuclear magnetic resonance (NMR) spectroscopy. Our key findings reveal a direct correlation between the strength and concentration of the base and the destruction of the MOFs. The summarized data provide valuable insights that can guide the practical application of Zr-based UiO-66 MOFs under basic conditions, offering essential information for their optimal utilization in various settings.
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Affiliation(s)
- Jun Yeong Kim
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Jiwon Kang
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Seungheon Cha
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Haein Kim
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Dopil Kim
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Houng Kang
- Department of Chemistry Education, Chungbuk National University, Cheongju 28644, Republic of Korea;
| | - Isaac Choi
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
| | - Min Kim
- Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea; (J.Y.K.); (J.K.); (S.C.); (H.K.); (D.K.)
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Xiao Y, Wu K, Batool SS, Wang Q, Chen H, Zhai X, Yu Z, Huang J. Enzymatic properties of alcohol dehydrogenase PedE_M.s. derived from Methylopila sp. M107 and its broad metal selectivity. Front Microbiol 2023; 14:1191436. [PMID: 37560521 PMCID: PMC10409515 DOI: 10.3389/fmicb.2023.1191436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 07/10/2023] [Indexed: 08/11/2023] Open
Abstract
As an important metabolic enzyme in methylotrophs, pyrroloquinoline quinone (PQQ)-dependent alcohol dehydrogenases play significant roles in the global carbon and nitrogen cycles. In this article, a calcium (Ca2+)-dependent alcohol dehydrogenase PedE_M.s., derived from the methylotroph Methylopila sp. M107 was inserted into the modified vector pCM80 and heterologously expressed in the host Methylorubrum extorquens AM1. Based on sequence analysis, PedE_M.s., a PQQ-dependent dehydrogenase belonging to a methanol/ethanol family, was successfully extracted and purified. Showing by biochemical results, its enzymatic activity was detected as 0.72 U/mg while the Km value was 0.028 mM while employing ethanol as optimal substrate. The activity of PedE_M.s. could be enhanced by the presence of potassium (K+) and calcium (Ca2+), while acetonitrile and certain common detergents have been found to decrease the activity of PedE_M.s.. In addition, its optimum temperature and pH were 30°C and pH 9.0, respectively. Chiefly, as a type of Ca2+-dependent alcohol dehydrogenase, PedE_M.s. maintained 60-80% activity in the presence of 10 mM lanthanides and displayed high affinity for ethanol compared to other PedE-type enzymes. The 3D structure of PedE_M.s. was predicted by AlphaFold, and it had an 8-bladed propeller-like super-barrel. Meanwhile, we could speculate that PedE_M.s. contained the conserved residues Glu213, Asn300, and Asp350 through multiple sequence alignment by Clustal and ESpript. The analysis of enzymatic properties of PedE_M.s. enriches our knowledge of the methanol/ethanol family PQQ-dependent dehydrogenase. This study provides new ideas to broaden the application of alcohol dehydrogenase in alcohol concentration calculation, biosensor preparation, and other industries.
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Affiliation(s)
- Ying Xiao
- Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Kaijuan Wu
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Syeda Sundas Batool
- Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Qingqun Wang
- Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Hao Chen
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Xingyu Zhai
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Zheng Yu
- Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Jing Huang
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
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