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Zeballos N, Comino N, Andrés-Sanz D, Santiago-Arcos J, Azkargorta M, Elortza F, Diamanti E, López-Gallego F. Region-Directed Enzyme Immobilization through Engineering Protein Surface with Histidine Clusters. ACS Appl Mater Interfaces 2024; 16:833-846. [PMID: 38135284 PMCID: PMC10788835 DOI: 10.1021/acsami.3c15993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/22/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023]
Abstract
Enzyme immobilization is a key enabling technology for a myriad of industrial applications, yet immobilization science is still too empirical to reach highly active and robust heterogeneous biocatalysts through a general approach. Conventional protein immobilization methods lack control over how enzymes are oriented on solid carriers, resulting in negative conformational changes that drive enzyme deactivation. Site-selective enzyme immobilization through peptide tags and protein domains addresses the orientation issue, but this approach limits the possible orientations to the N- and C-termini of the target enzyme. In this work, we engineer the surface of two model dehydrogenases to introduce histidine clusters into flexible regions not involved in catalysis, through which immobilization is driven. By varying the position and the histidine density of the clusters, we create a small library of enzyme variants to be immobilized on different carriers functionalized with different densities of various metal chelates (Co2+, Cu2+, Ni2+, and Fe3+). We first demonstrate that His-clusters can be as efficient as the conventional His-tags in immobilizing enzymes, recovering even more activity and gaining stability against some denaturing agents. Furthermore, we find that the enzyme orientation as well as the type and density of the metal chelates affect the immobilization parameters (immobilization yield and recovered activity) and the stability of the immobilized enzymes. According to proteomic studies, His-clusters enable a different enzyme orientation as compared to His-tag. Finally, these oriented heterogeneous biocatalysts are implemented in batch reactions, demonstrating that the stability achieved by an optimized orientation translates into increased operational stability.
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Affiliation(s)
- Nicoll Zeballos
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
| | - Natalia Comino
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
| | - Daniel Andrés-Sanz
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
| | - Javier Santiago-Arcos
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
| | - Mikel Azkargorta
- Center
for Cooperative Research in Biology (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 800 Bld, 48160 Derio, Bizkaia, Spain
- Centro
de Investigación Biomédica en Red de Enfermedades Hepáticas
y Digestivas (CIBERehd), 28029 Madrid, Spain
| | - Felix Elortza
- Center
for Cooperative Research in Biology (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 800 Bld, 48160 Derio, Bizkaia, Spain
- Centro
de Investigación Biomédica en Red de Enfermedades Hepáticas
y Digestivas (CIBERehd), 28029 Madrid, Spain
| | - Eleftheria Diamanti
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
| | - Fernando López-Gallego
- Center
for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo Miramon 194, 20014 San Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, 48013 Bilbao, Spain
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El-Lateef HMA, El-Dabea T, Khalaf MM, Abu-Dief AM. Innovation of Imine Metal Chelates as Corrosion Inhibitors at Different Media: A Collective Study. Int J Mol Sci 2022; 23:9360. [PMID: 36012623 DOI: 10.3390/ijms23169360] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/27/2022] [Accepted: 08/09/2022] [Indexed: 01/03/2023] Open
Abstract
The corrosion inhibition of transition metal chelates derived from Schiff base ligands was tested for (mild, copper, stainless, aluminum and carbon) steel in various concentrations of (HCl, HNO3 and H2SO4) acidic medium at 25 °C through (weight loss, potentiodynamic polarization, polarization curves, electrochemical impedance spectroscopy (EIS) and open circuit potential measurements (OCP)) techniques. The studied compounds were identified with various spectral, analytical and physico-chemical techniques. It was observed that the investigated compounds had a significant inhibitory impact on the corrosion of diverse steels in the medium investigated. The analysis shows that increasing the dose of the studied complexes improves the corresponding inhibitory efficiency values. Negative results of Gibb’s free adsorption energy (ΔGads0) prove the suppression process’s spontaneous and physical adsorption, which contradicts the Langmuir adsorption isotherm. As a result of this insight, a novel bridge between nuclearity driven coordinated inorganic chemistry and materials, as well as corrosion control, has been built. This review provides an overview of the use of Schiff bases and associated transition metals as potential corrosion inhibitors, including the factors that influence their application.
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Martins AS, Batista de Carvalho ALM, Marques MPM, Gil AM. Response of Osteosarcoma Cell Metabolism to Platinum and Palladium Chelates as Potential New Drugs. Molecules 2021; 26:4805. [PMID: 34443394 DOI: 10.3390/molecules26164805] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 12/13/2022] Open
Abstract
This paper reports the first metabolomics study of the impact of new chelates Pt2Spm and Pd2Spm (Spm = Spermine) on human osteosarcoma cellular metabolism, compared to the conventional platinum drugs cisplatin and oxaliplatin, in order to investigate the effects of different metal centers and ligands. Nuclear Magnetic Resonance metabolomics was used to identify meaningful metabolite variations in polar cell extracts collected during exposure to each of the four chelates. Cisplatin and oxaliplatin induced similar metabolic fingerprints of changing metabolite levels (affecting many amino acids, organic acids, nucleotides, choline compounds and other compounds), thus suggesting similar mechanisms of action. For these platinum drugs, a consistent uptake of amino acids is noted, along with an increase in nucleotides and derivatives, namely involved in glycosylation pathways. The Spm chelates elicit a markedly distinct metabolic signature, where inverse features are observed particularly for amino acids and nucleotides. Furthermore, Pd2Spm prompts a weaker response from osteosarcoma cells as compared to its platinum analogue, which is interesting as the palladium chelate exhibits higher cytotoxicity. Putative suggestions are discussed as to the affected cellular pathways and the origins of the distinct responses. This work demonstrates the value of untargeted metabolomics in measuring the response of cancer cells to either conventional or potential new drugs, seeking further understanding (or possible markers) of drug performance at the molecular level.
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Ferrier MG, Li Y, Chyan MK, Wong R, Li L, Spreckelmeyer S, Hamlin DK, Mastren T, Fassbender ME, Orvig C, Wilbur DS. Thorium chelators for targeted alpha therapy: Rapid chelation of thorium-226. J Labelled Comp Radiopharm 2020; 63:502-516. [PMID: 32812275 DOI: 10.1002/jlcr.3875] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/06/2020] [Accepted: 08/06/2020] [Indexed: 12/26/2022]
Abstract
One of the main challenges in targeted alpha therapy is assuring delivery of the α-particle dose to the targeted cells. Thus, it is critical to identify ligands for α-emitting radiometals that will form complexes that are very stable, both in vitro and in vivo. In this investigation, thorium-227 (t1/2 = 18.70 days) chelation of ligands containing hydroxypyridinonate (HOPO) or picolinic acid (pa) moieties and the stability of the resultant complexes were studied. Chelation reactions were followed by reversed-phased HPLC and gamma spectroscopy. Studies revealed that high 227 Th chelation yields could be obtained within 2.5 h or less with ligands containing four Me-3,2-HOPO moieties, 1 (83%) and 2 (65%), and also with ligands containing pa moieties, H4 octapa 3 (65%) and H4 py4pa 6 (87%). No reaction occurred with H4 neunpa-p-Bn-NO2 4, and the chelation reaction with another pa ligand H4 pypa 5 gave inconsistent yields with a very broad radio-HPLC peak. The ligands spermine-(Me-3,2-HOPO)4 1, H4 octapa 3, and H4 py4pa 6 had high stability (i.e., 87% of 227 Th still bound to the ligand) in phosphate-buffered saline at room temperature over a 6-day period. Preliminary studies with ligand 6 demonstrated efficient chelation of thorium-226 (t1/2 = 30.57 min) when heated to 80°C for 5 min.
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Affiliation(s)
- Maryline G Ferrier
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA.,Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - Yawen Li
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Ming-Kuan Chyan
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Roger Wong
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Lily Li
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada
| | - Sarah Spreckelmeyer
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald K Hamlin
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Tara Mastren
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | | | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - D Scott Wilbur
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
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Rivera M, Ha B, Zamini L, Gamby S, Pitter D, Muhoro CN. N-methylcarbamate pesticides and their phenolic degradation products: hydrolytic decay, sequestration and metal complexation studies. J Environ Sci Health B 2018; 54:54-60. [PMID: 30460875 DOI: 10.1080/03601234.2018.1531659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 06/09/2023]
Abstract
We report on the rates of decomposition of a group of N-methylcarbamate (NMC) pesticides (carbaryl, carbofuran and propoxur) under pre-determined tropical field conditions. Rates of decomposition for three NMCs were determined at pH 7.08 and T = 20 °C and pH 7.70 and T = 33 °C respectively, as follows: carbaryl (78 days and 69 days); carbofuran (143 days and 83 days) and propoxur (116 days and 79 days). Investigation on methods for removal of NMCs and their phenolic decomposition products shows that activated charcoal outperforms zeolite, alumina, diatomaceous earth, cellulose and montmorillonite clay in the removal of both NMCs and phenols from aqueous solution. Furthermore, metal complexation studies on the NMCs and phenols showed that Fe (III) forms a complex with isopropoxyphenol (IPP) within which the Fe:IPP ratio is 1:3, indicative of the formation of a metal chelate complex with the formula Fe(IPP)3.
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Affiliation(s)
- Michael Rivera
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
| | - Bao Ha
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
| | - Leili Zamini
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
| | - Sonja Gamby
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
| | - Demar Pitter
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
| | - Clare N Muhoro
- a Department of Chemistry , Towson University, Jess and Mildred Fisher College of Science and Mathematics , Towson , Maryland , USA
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Malenov DP, Ninković DB, Zarić SD. Stacking of metal chelates with benzene: can dispersion-corrected DFT be used to calculate organic-inorganic stacking? Chemphyschem 2015; 16:761-8. [PMID: 25630762 DOI: 10.1002/cphc.201402589] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Indexed: 11/06/2022]
Abstract
CCSD(T)/CBS energies for stacking of nickel and copper chelates are calculated and used as benchmark data for evaluating the performance of dispersion-corrected density functionals for calculating the interaction energies. The best functionals for modeling the stacking of benzene with the nickel chelate are M06HF-D3 with the def2-TZVP basis set, and B3LYP-D3 with either def2-TZVP or aug-cc-pVDZ basis set, whereas for copper chelate the PBE0-D3 with def2-TZVP basis set yielded the best results. M06L-D3 with aug-cc-pVDZ gives satisfying results for both chelates. Most of the tested dispersion-corrected density functionals do not reproduce the benchmark data for stacking of benzene with both nickel (no unpaired electrons) and copper chelate (one unpaired electron), whereas a number of these functionals perform well for interactions of organic molecules.
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Affiliation(s)
- Dušan P Malenov
- Innovation Center of the Department of Chemistry, Studentski trg 12-16, Belgrade (Serbia)
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