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Inoue S, Fukada K, Hayashi K, Seyama M. Data Processing of SPR Curve Data to Maximize the Extraction of Changes in Electrochemical SPR Measurements. BIOSENSORS 2022; 12:bios12080615. [PMID: 36005010 PMCID: PMC9406148 DOI: 10.3390/bios12080615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/30/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022]
Abstract
We developed a novel measuring and data-processing method for performing electrochemical surface plasmon resonance (EC-SPR) on sensor surfaces for which detecting a specific SPR angle is difficult, such as a polymer having a non-uniform thickness with coloration. SPR measurements are used in medicine and basic research as an analytical method capable of molecular detection without labeling. However, SPR is not good for detecting small molecules with small refractive index changes. The proposed EC-SPR, which combines SPR measurements with an electrochemical reaction, makes it possible to measure small molecules without increasing the number of measurement steps. A drawback of EC-SPR is that it is difficult to detect a specific SPR angle on electron mediators, and it was found that it may not be possible to capture all the features produced. The novel method we describe here is different from the conventional one in which a specific SPR angle is obtained from an SPR curve; rather, it processes the SPR curve itself and can efficiently aggregate the feature displacements in the SPR curves that are dispersed through multiple angles. As an application, we used our method to detect small concentrations of H2O2 (LOD 0.7 μM) and glutamate (LOD 5 μM).
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2
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Parrilla M, Vanhooydonck A, Watts R, De Wael K. Wearable wristband-based electrochemical sensor for the detection of phenylalanine in biofluids. Biosens Bioelectron 2021; 197:113764. [PMID: 34753096 DOI: 10.1016/j.bios.2021.113764] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/16/2021] [Accepted: 10/31/2021] [Indexed: 01/08/2023]
Abstract
Wearable electrochemical sensors are driven by the user-friendly capability of on-site detection of key biomarkers for health management. Despite the advances in biomolecule monitoring such as glucose, still, several unmet clinical challenges need to be addressed. For example, patients suffering from phenylketonuria (PKU) should be able to monitor their phenylalanine (PHE) level in a rapid, decentralized, and affordable manner to avoid high levels of PHE in the body which can lead to a profound and irreversible mental disability. Herein, we report a wearable wristband electrochemical sensor for the monitoring of PHE tackling the necessity of controlling PHE levels in PHE hydroxylase deficiency patients. The proposed electrochemical sensor is based on a screen-printed electrode (SPE) modified with a membrane consisting of Nafion, to avoid interferences in biofluids. The membrane also consists of sodium 1,2-naphthoquinone-4-sulphonate for the in situ derivatization of PHE into an electroactive product, allowing its electrochemical oxidation at the surface of the SPE in alkaline conditions. Importantly, the electrochemical sensor is integrated into a wristband configuration to enhance user interaction and engage the patient with PHE self-monitoring. Besides, a paper-based sampling strategy is designed to alkalinize the real sample without the need for sample pretreatment, and thus simplify the analytical process. Finally, the wearable device is tested for the determination of PHE in saliva and blood serum. The proposed wristband-based sensor is expected to impact the PKU self-monitoring, facilitating the daily lives of PKU patients toward optimal therapy and disease management.
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Affiliation(s)
- Marc Parrilla
- A-Sense Lab, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Andres Vanhooydonck
- Product Development Research Group, Faculty of Design Sciences, University of Antwerp, Ambtmanstraat 1, 2000, Antwerp, Belgium
| | - Regan Watts
- Product Development Research Group, Faculty of Design Sciences, University of Antwerp, Ambtmanstraat 1, 2000, Antwerp, Belgium
| | - Karolien De Wael
- A-Sense Lab, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
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3
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Matsui D, Asano Y. Creation of thermostable l-tryptophan dehydrogenase by protein engineering and its application for l-tryptophan quantification. Anal Biochem 2019; 579:57-63. [DOI: 10.1016/j.ab.2019.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/11/2019] [Accepted: 05/13/2019] [Indexed: 02/08/2023]
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4
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Asano Y, Yasukawa K. Identification and development of amino acid oxidases. Curr Opin Chem Biol 2019; 49:76-83. [DOI: 10.1016/j.cbpa.2018.10.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 10/16/2018] [Accepted: 10/22/2018] [Indexed: 12/23/2022]
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5
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Asano Y. Screening and development of enzymes for determination and transformation of amino acids. Biosci Biotechnol Biochem 2019; 83:1402-1416. [PMID: 30621552 DOI: 10.1080/09168451.2018.1559027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The high stereo- and substrate specificities of enzymes have been utilized for micro-determination of amino acids. Here, I review the discovery of l-Phe dehydrogenase and its practical use in the diagnosis of phenylketonuria in more than 5,400,000 neonates over two decades in Japan. Screening and uses of other selective enzymes for micro-determination of amino acids have also been discussed. In addition, novel enzymatic assays with the systematic use of known enzymes, including assays based on a pyrophosphate detection system using pyrophosphate dikinase for a variety of l-amino acids with amino-acyl-tRNA synthetase have been reviewed. Finally, I review the substrate specificities of a few amino acid-metabolizing enzymes that have been altered, using protein engineering techniques, mainly for production of useful chemicals, thus enabling the wider use of natural enzymes.
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Affiliation(s)
- Yasuhisa Asano
- a Biotechnology Research Center and Department of Biotechnology , Toyama Prefectural University , Imizu , Toyama , Japan
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6
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Im D, Matsui D, Arakawa T, Isobe K, Asano Y, Fushinobu S. Ligand complex structures of l-amino acid oxidase/monooxygenase from Pseudomonas sp. AIU 813 and its conformational change. FEBS Open Bio 2018; 8:314-324. [PMID: 29511608 PMCID: PMC5832979 DOI: 10.1002/2211-5463.12387] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/26/2017] [Accepted: 01/16/2018] [Indexed: 11/06/2022] Open
Abstract
l-Amino acid oxidase/monooxygenase from Pseudomonas sp. AIU 813 (l-AAO/MOG) catalyzes both the oxidative deamination and oxidative decarboxylation of the α-group of l-Lys to produce a keto acid and amide, respectively. l-AAO/MOG exhibits limited specificity for l-amino acid substrates with a basic side chain. We previously determined its ligand-free crystal structure and identified a key residue for maintaining the dual activities. Here, we determined the structures of l-AAO/MOG complexed with l-Lys, l-ornithine, and l-Arg and revealed its substrate recognition. Asp238 is located at the ceiling of a long hydrophobic pocket and forms a strong interaction with the terminal, positively charged group of the substrates. A mutational analysis on the D238A mutant indicated that the interaction is critical for substrate binding but not for catalytic control between the oxidase/monooxygenase activities. The catalytic activities of the D238E mutant unexpectedly increased, while the D238F mutant exhibited altered substrate specificity to long hydrophobic substrates. In the ligand-free structure, there are two channels connecting the active site and solvent, and a short region located at the dimer interface is disordered. In the l-Lys complex structure, a loop region is displaced to plug the channels. Moreover, the disordered region in the ligand-free structure forms a short helix in the substrate complex structures and creates the second binding site for the substrate. It is assumed that the amino acid substrate enters the active site of l-AAO/MOG through this route. Database The atomic coordinates and structure factors (codes 5YB6, 5YB7, and 5YB8) have been deposited in the Protein Data Bank (http://wwpdb.org/). EC numbers 1.4.3.2 (l-amino acid oxidase), 1.13.12.2 (lysine 2-monooxygenase).
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Affiliation(s)
- Dohyun Im
- Department of Biotechnology The University of Tokyo Japan.,Present address: Department of Cell Biology Graduate School of Medicine Kyoto University Yoshidakonoe-cho, Sakyo-ku Kyoto 606-8501 Japan
| | - Daisuke Matsui
- Department of Biotechnology Biotechnology Research Center Toyama Prefectural University Imizu Japan.,Asano Active Enzyme Molecule Project ERATOJS TImizu Japan
| | | | - Kimiyasu Isobe
- Asano Active Enzyme Molecule Project ERATOJS TImizu Japan
| | - Yasuhisa Asano
- Department of Biotechnology Biotechnology Research Center Toyama Prefectural University Imizu Japan.,Asano Active Enzyme Molecule Project ERATOJS TImizu Japan
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7
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Honda K, Hara N, Cheng M, Nakamura A, Mandai K, Okano K, Ohtake H. In vitro metabolic engineering for the salvage synthesis of NAD(.). Metab Eng 2016; 35:114-120. [PMID: 26912312 DOI: 10.1016/j.ymben.2016.02.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/28/2016] [Accepted: 02/11/2016] [Indexed: 10/22/2022]
Abstract
Excellent thermal and operational stabilities of thermophilic enzymes can greatly increase the applicability of biocatalysis in various industrial fields. However, thermophilic enzymes are generally incompatible with thermo-labile substrates, products, and cofactors, since they show the maximal activities at high temperatures. Despite their pivotal roles in a wide range of enzymatic redox reactions, NAD(P)(+) and NAD(P)H exhibit relatively low stabilities at high temperatures, tending to be a major obstacle in the long-term operation of biocatalytic chemical manufacturing with thermophilic enzymes. In this study, we constructed an in vitro artificial metabolic pathway for the salvage synthesis of NAD(+) from its degradation products by the combination of eight thermophilic enzymes. The enzymes were heterologously produced in recombinant Escherichia coli and the heat-treated crude extracts of the recombinant cells were directly used as enzyme solutions. When incubated with experimentally optimized concentrations of the enzymes at 60°C, the NAD(+) concentration could be kept almost constant for 15h.
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Affiliation(s)
- Kohsuke Honda
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan.
| | - Naoya Hara
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Maria Cheng
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - Anna Nakamura
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Komako Mandai
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kenji Okano
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hisao Ohtake
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Lima JM, Salmazo Vieira P, Cavalcante de Oliveira AH, Cardoso CL. Label-free offline versus online activity methods for nucleoside diphosphate kinase b using high performance liquid chromatography. Analyst 2016; 141:4733-41. [DOI: 10.1039/c6an00655h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Label-free methodologies for nucleoside diphosphate kinase fromLeishmaniaspp. (LmNDKb): anofflineLC-UV assay for solubleLmNDKb and anonlinetwo-dimensional LC-UV system based on immobilizedLmNDKb to help screenLmNDKb ligands and measure NDKb activity.
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Affiliation(s)
- Juliana Maria Lima
- Departamento de Química
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto
- Universidade de São Paulo
- 14040-901
| | - Plínio Salmazo Vieira
- Laboratório Nacional de Biociências (LNBio)
- Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
- Campinas
- Brazil
| | - Arthur Henrique Cavalcante de Oliveira
- Departamento de Química
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto
- Universidade de São Paulo
- 14040-901
| | - Carmen Lúcia Cardoso
- Departamento de Química
- Grupo de Cromatografia de Bioafinidade e Produtos Naturais
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto
- Universidade de São Paulo
- 14040-901
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9
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Longo GS, de la Cruz MO, Szleifer I. Equilibrium adsorption of hexahistidine on pH-responsive hydrogel nanofilms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15335-15344. [PMID: 25434993 DOI: 10.1021/la5040382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a molecular theory to study the adsorption of different species within pH-sensitive hydrogel nanofilms. The theoretical framework allows for a molecular-level description of all the components of the system, and it explicitly accounts for the acid-base equilibrium. We concentrate on the adsorption of hexahistidine, one of the most widely used tags in bio-related systems, particularly in chromatography of proteins. The adsorption of hexahistidine within a grafted polyacid hydrogel film shows a nonmonotonic dependence on the solution pH. Depending on the salt concentration, the density of the polymer network, and the bulk concentration of peptide, substantial adsorption is predicted in the intermediate pH range where both the network and the amino acids are charged. To enhance the electrostatic attractions, the acid-base equilibrium of adsorbed hexahistidine is shifted significantly, increasing the degree of charge of the residues as compared to the bulk solution. Such a shift depends critically on the conditions of the environment at the nanoscale. At the same time, the degree of dissociation of the network becomes that of the isolated acid group in a dilute solution, which means that the network is considerably more charged than when there is no adsorbate molecules. This work provides fundamental information on the physical chemistry behind the adsorption behavior and the response of the hydrogel film. This information can be useful in designing new materials for the purification or separation/immobilization of histidine-tagged proteins.
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Affiliation(s)
- Gabriel S Longo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET , La Plata, Argentina
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10
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Gaffney D, Abdallah NH, Cooney JC, Laffir FR, Cassimjee KE, Berglund P, Hanefeld U, Magner E. Preparation and characterisation of a Ni2+/Co2+-cyclam modified mesoporous cellular foam for the specific immobilisation of His6-alanine racemase. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Discrimination of Aliphatic Substrates by a Single Amino Acid Substitution inBacillus badiusandBacillus sphaericusPhenylalanine Dehydrogenases. Biosci Biotechnol Biochem 2014; 73:729-32. [DOI: 10.1271/bbb.80626] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Kameya M, Asano Y. Rapid enzymatic assays for l-citrulline and l-arginine based on the platform of pyrophosphate detection. Enzyme Microb Technol 2014; 57:36-41. [DOI: 10.1016/j.enzmictec.2014.01.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/13/2014] [Accepted: 01/16/2014] [Indexed: 12/13/2022]
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13
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Kim MI, Park TJ, Heo NS, Woo MA, Cho D, Lee SY, Park HG. Cell-based method utilizing fluorescent Escherichia coli auxotrophs for quantification of multiple amino acids. Anal Chem 2014; 86:2489-96. [PMID: 24475885 DOI: 10.1021/ac403429s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cell-based assay system for simultaneous quantification of the three amino acids, phenylalanine (Phe), methionine (Met), and leucine (Leu) in a single biological sample, was developed and applied in the multiplex diagnosis of three key metabolic diseases of newborn babies. The assay utilizes three Escherichia coli auxotrophs, which grow only in the presence of the corresponding target amino acids and which contain three different fluorescent reporter plasmids that produce distinguishable fluorescence signals (red, green, and cyan) in concert with cell growth. To mixtures of the three auxotrophs, immobilized on agarose gels arrayed on a well plate, is added a test sample. Following incubation, the concentrations of the three amino acids in the sample are simultaneously determined by measuring the intensities of three fluorescence signals that correspond to the reporter plasmids. The clinical utility of this assay system was demonstrated by employing it to identify metabolic diseases of newborn babies through the quantification of Phe, Met, and Leu in clinically derived dried blood spot specimens. The general strategy developed in this effort should be applicable to the design of new assay systems for the quantification of multiple amino acids derived from complex biological samples and, as such, to expand the utilization of cell-based analytical systems that replace conventional, yet laborious methods currently in use.
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Affiliation(s)
- Moon Il Kim
- Department of Chemical & Biomolecular Engineering (BK21+ Program), KAIST , 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
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14
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Kameya M, Himi M, Asano Y. Rapid and selective enzymatic assay for L-methionine based on a pyrophosphate detection system. Anal Biochem 2013; 447:33-8. [PMID: 24239571 DOI: 10.1016/j.ab.2013.11.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 10/31/2013] [Accepted: 11/01/2013] [Indexed: 12/14/2022]
Abstract
An enzymatic assay for L-methionine was developed by coupling adenosylmethionine synthetase (AdoMetS) to a pyrophosphate (PP(i)) detection system, which was constructed using pyruvate, phosphate dikinase. To expand the use of this assay, the PP(i) detection system was embodied as three different forms, which allowed PP(i) to be measured by UV, visible, and fluorescent light detectors. The assay system was robust and could tolerate the addition of inorganic phosphate and ATP to the assay mixtures. L-Methionine could be accurately determined by coupling the PP(i) detection system and AdoMetS. This AdoMetS coupling assay was highly selective to L-methionine and exhibited no significant activity to other proteinaceous amino acids, ammonia, or urea, unlike conventional enzymatic assays for L-methionine. Spike and recovery tests showed that the AdoMetS assay could accurately and reproducibly determine increases in L-methionine in human plasma samples without any pretreatment to remove proteins and potentially interfering low-molecular-weight molecules. The high selectivity and robustness of the AdoMetS assay provide rapid and high-throughput analysis of L-methionine in various kinds of analytes.
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Affiliation(s)
- Masafumi Kameya
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan; Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Mariko Himi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Yasuhisa Asano
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan; Asano Active Enzyme Molecule Project, ERATO, JST, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan.
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15
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Mukai C, Gao L, Bergkvist M, Nelson JL, Hinchman MM, Travis AJ. Biomimicry enhances sequential reactions of tethered glycolytic enzymes, TPI and GAPDHS. PLoS One 2013; 8:e61434. [PMID: 23626684 PMCID: PMC3634084 DOI: 10.1371/journal.pone.0061434] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 03/10/2013] [Indexed: 01/02/2023] Open
Abstract
Maintaining activity of enzymes tethered to solid interfaces remains a major challenge in developing hybrid organic-inorganic devices. In nature, mammalian spermatozoa have overcome this design challenge by having glycolytic enzymes with specialized targeting domains that enable them to function while tethered to a cytoskeletal element. As a step toward designing a hybrid organic-inorganic ATP-generating system, we implemented a biomimetic site-specific immobilization strategy to tether two glycolytic enzymes representing different functional enzyme families: triose phosphoisomerase (TPI; an isomerase) and glyceraldehyde 3-phosphate dehydrogenase (GAPDHS; an oxidoreductase). We then evaluated the activities of these enzymes in comparison to when they were tethered via classical carboxyl-amine crosslinking. Both enzymes show similar surface binding regardless of immobilization method. Remarkably, specific activities for both enzymes were significantly higher when tethered using the biomimetic, site-specific immobilization approach. Using this biomimetic approach, we tethered both enzymes to a single surface and demonstrated their function in series in both forward and reverse directions. Again, the activities in series were significantly higher in both directions when the enzymes were coupled using this biomimetic approach versus carboxyl-amine binding. Our results suggest that biomimetic, site-specific immobilization can provide important functional advantages over chemically specific, but non-oriented attachment, an important strategic insight given the growing interest in recapitulating entire biological pathways on hybrid organic-inorganic devices.
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Affiliation(s)
- Chinatsu Mukai
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Lizeng Gao
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Magnus Bergkvist
- College of Nanoscale Science and Engineering, University at Albany, State University of New York, Albany, New York, United States of America
| | - Jacquelyn L. Nelson
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Meleana M. Hinchman
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Alexander J. Travis
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
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Abstract
Mammalian sperm have evolved under strict selection pressures that have resulted in a highly polarized and efficient design. A critical component of that design is the compartmentalization of specific metabolic pathways to specific regions of the cell. Although the restricted localization of mitochondria to the midpiece is the best known example of this design, the organization of the enzymes of glycolysis along the fibrous sheath is the primary focus of this review. Evolution of variants of these metabolic enzymes has allowed them to function when tethered, enabling localized energy production that is essential for sperm motility. We close by exploring how this design might be mimicked to provide an energy-producing platform technology for applications in nanobiotechnology.
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Affiliation(s)
- C Mukai
- College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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17
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Yamasaki-Yashiki S, Tachibana S, Asano Y. Determination of l-methionine using methionine-specific dehydrogenase for diagnosis of homocystinuria due to cystathionine β-synthase deficiency. Anal Biochem 2012; 428:143-9. [DOI: 10.1016/j.ab.2012.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Revised: 06/05/2012] [Accepted: 06/21/2012] [Indexed: 11/30/2022]
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18
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Jebrail MJ, Yang H, Mudrik JM, Lafrenière NM, McRoberts C, Al-Dirbashi OY, Fisher L, Chakraborty P, Wheeler AR. A digital microfluidic method for dried blood spot analysis. LAB ON A CHIP 2011; 11:3218-3224. [PMID: 21869989 DOI: 10.1039/c1lc20524b] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Blood samples stored as dried blood spots (DBSs) are emerging as a useful sampling and storage vehicle for a wide range of applications. Unfortunately, the surging popularity of DBS samples has not yet been accompanied by an improvement in automated techniques for extraction and analysis. As a first step towards overcoming this challenge, we have developed a prototype microfluidic system for quantification of amino acids in dried blood spots, in which analytes are extracted, mixed with internal standards, derivatized, and reconstituted for analysis by (off-line and in-line) tandem mass spectrometry. The new method is fast, robust, precise, and most importantly, compatible with automation. We propose that the new method can potentially contribute to a new generation of analytical techniques for quantifying analytes in DBS samples for a wide range of applications.
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Affiliation(s)
- Mais J Jebrail
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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19
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Wiesbauer J, Bolivar JM, Mueller M, Schiller M, Nidetzky B. Oriented Immobilization of Enzymes Made Fit for Applied Biocatalysis: Non-Covalent Attachment to Anionic Supports usingZbasic2Module. ChemCatChem 2011. [DOI: 10.1002/cctc.201100103] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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20
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Highly selective l-threonine 3-dehydrogenase from Cupriavidus necator and its use in determination of l-threonine. Anal Biochem 2011; 410:44-56. [DOI: 10.1016/j.ab.2010.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 10/29/2010] [Accepted: 11/03/2010] [Indexed: 12/12/2022]
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21
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Matsuda M, Asano Y. Determination of plasma and serum l-lysine using l-lysine ε-oxidase from Marinomonas mediterranea NBRC 103028T. Anal Biochem 2010; 406:19-23. [DOI: 10.1016/j.ab.2010.06.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 06/21/2010] [Accepted: 06/27/2010] [Indexed: 11/25/2022]
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Sequential reactions of surface- tethered glycolytic enzymes. ACTA ACUST UNITED AC 2010; 16:1013-20. [PMID: 19778729 DOI: 10.1016/j.chembiol.2009.08.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 07/24/2009] [Accepted: 08/05/2009] [Indexed: 11/23/2022]
Abstract
The development of complex hybrid organic-inorganic devices faces several challenges, including how they can generate energy. Cells face similar challenges regarding local energy production. Mammalian sperm solve this problem by generating ATP down the flagellar principal piece by means of glycolytic enzymes, several of which are tethered to a cytoskeletal support via germ-cell-specific targeting domains. Inspired by this design, we have produced recombinant hexokinase type 1 and glucose-6-phosphate isomerase capable of oriented immobilization on a nickel-nitrilotriacetic acid modified surface. Specific activities of enzymes tethered via this strategy were substantially higher than when randomly adsorbed. Furthermore, these enzymes showed sequential activities when tethered onto the same surface. This is the first demonstration of surface-tethered pathway components showing sequential enzymatic activities, and it provides a first step toward reconstitution of glycolysis on engineered hybrid devices.
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Investigation of chromatography and polymer/salt aqueous two-phase processes for downstream processing development of recombinant phenylalanine dehydrogenase. Bioprocess Biosyst Eng 2009; 33:317-29. [DOI: 10.1007/s00449-009-0327-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Accepted: 04/22/2009] [Indexed: 11/25/2022]
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Cassimjee KE, Trummer M, Branneby C, Berglund P. Silica-immobilized His6-tagged enzyme: Alanine racemase in hydrophobic solvent. Biotechnol Bioeng 2007; 99:712-6. [PMID: 17680683 DOI: 10.1002/bit.21587] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A new immobilization method for enzymes is presented to facilitate synthetic applications in aqueous as well as organic media. The enzyme Alanine racemase (AlaR) from Geobacillus stearothermophilus was cloned, overexpressed and then immobilized on a silica-coated thin-layer chromatography plate to create an enzyme surface. The enzyme, fused to a His(6)-tag at its N-terminal, was tethered to the chemically modified silica-coated TLC plate through cobalt ions. The immobilized enzyme showed unaltered kinetic parameters in small-scale stirred reactions and retained its activity after rinsing, drying, freezing or immersion in n-hexane. This practical method is a first step towards a general immobilization method for synthesis applications with any enzyme suitable for His6-tagging.
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Affiliation(s)
- Karim Engelmark Cassimjee
- Department of Biochemistry, School of Biotechnology, Royal Institute of Technology (KTH), AlbaNova University Center, SE-106 91 Stockholm, Sweden
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