1
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Comparison of two azobenzene-based amino acid derivatization reagents for LC-MS/MS analysis in positive and negative ESI modes. Talanta 2022; 252:123803. [DOI: 10.1016/j.talanta.2022.123803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 11/21/2022]
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2
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Running L, Atilla-Gokcumen GE, Aga DS. Development of a Liquid Chromatography-Mass Spectrometry-Based In Vitro Assay to Assess Changes in Steroid Hormones Due to Exposure to Per- and Polyfluoroalkyl Substances. Chem Res Toxicol 2022; 35:1277-1288. [PMID: 35696490 DOI: 10.1021/acs.chemrestox.2c00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Per- and poly-fluorinated substances (PFASs) are organic pollutants that have been linked to numerous health effects, including diabetes, cancers, and dysregulation of the endocrine system. This study aims to develop a liquid chromatography with tandem mass spectrometry (LC-MS/MS) assay to measure changes in 17 hormones in H295R cell line (a steroid producing adrenocortical cells) upon exposure to PFASs. Due to the challenges in the analysis of steroid hormones using electrospray ionization MS, a chemical derivatization method was employed to achieve 0.07-2 μg/L detection limits in LC-MS/MS. Furthermore, a 10-fold concentration factor through solid-phase extraction (SPE) allows for consistent sub-parts per billion detections. Optimization of the derivatization conditions showed doubly-derivatized products in some hormone analytes, including progesterone, corticosterone, and cortisol, and gave improved ionization efficiency up to 20-fold higher signal than the singly-derivatized product. The use of SPE for sample cleanup to analyze hormones from cellular media using weak anion exchange sorbent yielded 80-100% recovery for the 17 targeted hormones. The method was validated by exposing H295R cells to two known endocrine disruptors, forskolin and prochloraz, which showed expected changes in hormones. An initial exposure of H295R cells with various PFAS standards and their mixtures at 1 μM showed significant increases in progestogens with some PFAS treatments, which include PFBS, PFHxA, PFOS, PFDA, and PFDS. In addition, modest changes in hormone levels were observed in cells treated with other sulfonated or carboxylated headgroup PFASs. This sensitive LC-MS/MS method for hormone analysis in H295R cells will allow for the investigations of the alterations in the hormone production caused by exposure to various environmental insults in cell-based assays and other in vitro models.
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Affiliation(s)
- Logan Running
- Department of Chemistry, University at Buffalo, The State University of New York (SUNY), Buffalo, New York 14260, United States
| | - G Ekin Atilla-Gokcumen
- Department of Chemistry, University at Buffalo, The State University of New York (SUNY), Buffalo, New York 14260, United States
| | - Diana S Aga
- Department of Chemistry, University at Buffalo, The State University of New York (SUNY), Buffalo, New York 14260, United States
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3
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Development of a method for dansylation of metabolites using organic solvent-compatible buffer systems for amine/phenol submetabolome analysis. Anal Chim Acta 2022; 1189:339218. [PMID: 34815039 DOI: 10.1016/j.aca.2021.339218] [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: 08/27/2021] [Revised: 10/17/2021] [Accepted: 10/23/2021] [Indexed: 11/21/2022]
Abstract
Metabolomics, which serves as a readout of biological processes and diseases monitoring, is an informative research area for disease biomarker discovery and systems biology studies. In particular, reversed-phase liquid chromatography-mass spectrometry (RPLC-MS) has become a powerful and popular tool for metabolomics analysis, enabling the detection of most metabolites. Very polar and ionic metabolites, however, are less easily detected because of their poor retention in RP columns. Dansylation of metabolites simplifies the sub-metabolome analysis by reducing its complexity and increasing both hydrophobicity and ionization ability. However, the various metabolite concentrations in clinical samples have a wide dynamic range with highly individual variation in total metabolite amount, such as in saliva. The bicarbonate buffer typically used in dansylation labeling reactions induces solvent stratification, resulting in poor reproducibility, selective sample loss and an increase in false-determined metabolite peaks. In this study, we optimized the dansylation protocol for samples with wide concentration range of metabolites, utilizing diisopropylethylamine (DIPEA) or tri-ethylamine (TEA) in place of bicarbonate buffer, and presented the results of a systemic investigation of the influences of individual processes involved on the overall performance of the protocol. In addition to achieving high reproducibility, substitution of DIPEA or TEA buffer resulted in similar labeling efficiency of most metabolites and more efficient labeling of some metabolites with a higher pKa. With this improvement, compounds that are only present in samples in trace amounts can be detected, and more comprehensive metabolomics profiles can be acquired for biomarker discovery or pathway analysis, making it possible to analyze clinical samples with limited amounts of metabolites.
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4
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Lu X, Dou P, Xie X, Wang X, Liu X, Hua R, Xu G. Development of a novel analytical method for inflammation and immunity-related metabolites in serum based on liquid chromatography tandem mass spectrometry. Talanta 2021; 234:122631. [PMID: 34364440 DOI: 10.1016/j.talanta.2021.122631] [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: 04/06/2021] [Revised: 06/14/2021] [Accepted: 06/17/2021] [Indexed: 01/01/2023]
Abstract
Some metabolites have been found to play key roles in inflammation and immunity events that are associated with diseases such as cancer, diabetes and cytokine release syndrome. Characterization upon the inflammation and immunity-related metabolites (IIMs) will be helpful to the assessment of related pathological states. Although these metabolites have been partially reported in previous studies, the methods for specific measurement of them remain lacking. In the present study, a liquid chromatography - mass spectrometry based method was developed for the targeted analyses of 45 IIMs including amino acids, organic acids, phosphatidylcholines (PCs), polyunsaturated fatty acids and hormones selected based on the literature knowledge. Direct extraction with dansyl-chloride in acetonitrile was proved to be the most efficient and time-saving strategy, in which precipitation, extraction and derivatization were integrated. IIMs derivatized for 4 min and quenched for 2 min revealed the most comprehensive abundance. Based on the defined conditions, all the IIMs had a low limit of detection smaller than 1 ng/mL with the linear range greater than three orders of magnitude. The relative standard derivations of intra-day and inter-day precisions were ranged from 2.2% to 13.4% and 1.7% to 19.5%, respectively. The recovery rates and accuracy in low concentration were 98.9% ± 5.6% and 106.7% ± 11.6%, in medium concentration were 97.1% ± 6.8% and 106.9% ± 9.5%, and in high concentration were 98.4% ± 8.9% and 98.1% ± 8.1%, respectively. Matrix effect and stability were ranged from -37.8% to 35.6% and 2.9% to 14.2%, respectively. To show the usefulness of the method, serum IIMs in hepatitis B virus (HBV) infected patients and healthy subjects were determined and compared. Bile acids, lipoxygenase-mediated lipid mediators and non-enzymatic products showed global increases, whereas most of LysoPCs and cyclooxygenase-mediated prostaglandin D2 decreased in HBV serum samples. This study provided a robust approach for the characterization of IIMs.
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Affiliation(s)
- Xin Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Peng Dou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiaoyu Xie
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiaolin Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xinyu Liu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Rui Hua
- Department of Hepatology, First Hospital, Jilin University, Changchun, Jilin, 130021, China.
| | - Guowang Xu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
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5
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Abstract
Metabolites have essential roles in microbial communities, including as mediators of nutrient and energy exchange, cell-to-cell communication, and antibiosis. However, detecting and quantifying metabolites and other chemicals in samples having extremes in salt or mineral content using liquid chromatography-mass spectrometry (LC-MS)-based methods remains a significant challenge. Here, we report a facile method based on in situ chemical derivatization followed by extraction for analysis of metabolites and other chemicals in hypersaline samples, enabling for the first time direct LC-MS-based exometabolomics analysis in sample matrices containing up to 2 M total dissolved salts. The method, MetFish, is applicable to molecules containing amine, carboxylic acid, carbonyl, or hydroxyl functional groups, and it can be integrated into either targeted or untargeted analysis pipelines. In targeted analyses, MetFish provided limits of quantification as low as 1 nM, broad linear dynamic ranges (up to 5 to 6 orders of magnitude) with excellent linearity, and low median interday reproducibility (e.g., 2.6%). MetFish was successfully applied in targeted and untargeted exometabolomics analyses of microbial consortia, quantifying amino acid dynamics in the exometabolome during community succession; in situ in a native prairie soil, whose exometabolome was isolated using a hypersaline extraction; and in input and produced fluids from a hydraulically fractured well, identifying dramatic changes in the exometabolome over time in the well. IMPORTANCE The identification and accurate quantification of metabolites using electrospray ionization-mass spectrometry (ESI-MS) in hypersaline samples is a challenge due to matrix effects. Clean-up and desalting strategies that typically work well for samples with lower salt concentrations are often ineffective in hypersaline samples. To address this gap, we developed and demonstrated a simple yet sensitive and accurate method—MetFish—using chemical derivatization to enable mass spectrometry-based metabolomics in a variety of hypersaline samples from varied ecosystems and containing up to 2 M dissolved salts.
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6
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Abstract
Two derivatives of dansyl (1-dimethylamino-5-naphthalenesulfonyl) in which the amino group is constrained in a ring are prepared as neopentyl esters. Their photophysical behavior is compared with that of the dansyl ester. The solvatochromism and quantum yields are similar for all three. Since the two constrained derivatives cannot twist about the amino group, they must emit from a planar intramolecular charge-transfer excited state. The similar photophysical behavior suggests that dansyl also emits from a PICT excited state instead of a twisted intramolecular charge transfer state.
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Affiliation(s)
- Kristen Lum
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia 23185, United States
| | - Stephanie M Zielinski
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia 23185, United States
| | - Christopher J Abelt
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia 23185, United States
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7
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Godin É, Nguyen Thanh S, Guerrero-Morales J, Santandrea J, Caron A, Minozzi C, Beaucage N, Rey B, Morency M, Abel-Snape X, Collins SK. Synthesis and Diversification of Macrocyclic Alkynediyl Sulfide Peptides. Chemistry 2020; 26:14575-14579. [PMID: 32886838 DOI: 10.1002/chem.202003655] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/31/2020] [Indexed: 12/15/2022]
Abstract
The synthesis of rare macrocyclic alkynediyl sulfides by a Cu-catalyzed Csp -S cross-coupling is presented. The catalytic protocol (Cu(MeCN)4 PF6 /dtbbpy) promotes macrocyclization of peptides, dipeptides and tripeptides at ambient temperature (14 examples, 23→73 % yields) via thiols and bromoalkynes, and is chemoselective with regards to terminal alkynes. Importantly, the underexplored alkynediyl sulfide functionality incorporates a rigidifying structural element and opens new opportunities for diversification of macrocyclic frameworks through S oxidation, halide addition and azide-alkyne cycloaddition chemistries to integrate sulfones, halides or valuable fluorophores (7 examples, 37→92 % yields).
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Affiliation(s)
- Éric Godin
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Sacha Nguyen Thanh
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Javier Guerrero-Morales
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Jeffrey Santandrea
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Antoine Caron
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Clémentine Minozzi
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Noémie Beaucage
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Bastien Rey
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Mathieu Morency
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Xavier Abel-Snape
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
| | - Shawn K Collins
- Département de Chimie, Centre for Green Chemistry and Catalysis, Université de Montréal, Complexe des Sciences, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada
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8
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Gender-Related Differences on Polyamine Metabolome in Liquid Biopsies by a Simple and Sensitive Two-Step Liquid-Liquid Extraction and LC-MS/MS. Biomolecules 2019; 9:biom9120779. [PMID: 31779105 PMCID: PMC6995533 DOI: 10.3390/biom9120779] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/13/2019] [Accepted: 11/21/2019] [Indexed: 01/15/2023] Open
Abstract
Polyamines are involved in the regulation of many cellular functions and are promising biomarkers of numerous physiological conditions. Since the concentrations of these compounds in biological fluids are low, sample extraction is one of the most critical steps of their analysis. Here, we developed a comprehensive, sensitive, robust, and high-throughput LC-MS/MS stable-isotope dilution method for the simultaneous determination of 19 metabolites related to polyamine metabolism, including polyamines, acetylated and diacetylated polyamines, precursors, and catabolites from liquid biopsies. The sample extraction was optimized to remove interfering compounds and to reduce matrix effects, thus being useful for large clinical studies. The method consists of two-step liquid-liquid extraction with a Folch extraction and ethyl acetate partitioning combined with dansyl chloride derivatization. The developed method was applied to a small gender-related trial concerning human serum and urine samples from 40 obese subjects. Sex differences were found for cadaverine, putrescine, 1,3-diaminopropane, γ-aminobutyric acid, N8-acetylspermidine, and N-acetylcadaverine in urine; N1-acetylspermine in serum; and spermine in both serum and urine. The results demonstrate that the developed method can be used to analyze biological samples for the study of polyamine metabolism and its association with human diseases.
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9
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Yokoo H, Kagechika H, Ohsaki A, Hirano T. A Polarity‐Sensitive Fluorescent Amino Acid and its Incorporation into Peptides for the Ratiometric Detection of Biomolecular Interactions. Chempluschem 2019; 84:1716-1719. [DOI: 10.1002/cplu.201900489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/04/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Hidetomo Yokoo
- Institute of Biomaterials and BioengineeringTokyo Medical and Dental University (TMDU) 2-3-10 Kanda-Surugadai, Chiyoda-ku Tokyo 101-0062 Japan
| | - Hiroyuki Kagechika
- Institute of Biomaterials and BioengineeringTokyo Medical and Dental University (TMDU) 2-3-10 Kanda-Surugadai, Chiyoda-ku Tokyo 101-0062 Japan
| | - Ayumi Ohsaki
- College of Humanities and SciencesNihon University 3-25-40 Sakurajosui, Setagaya-ku Tokyo 156-8550 Japan
| | - Tomoya Hirano
- Osaka University of Pharmaceutical Sciences 4-20-1 Nasahara, Takatsuki Osaka 569-1094 Japan
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10
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Barnette DA, Davis MA, Dang NL, Pidugu AS, Hughes T, Swamidass SJ, Boysen G, Miller GP. Lamisil (terbinafine) toxicity: Determining pathways to bioactivation through computational and experimental approaches. Biochem Pharmacol 2018; 156:10-21. [PMID: 30076845 PMCID: PMC6188815 DOI: 10.1016/j.bcp.2018.07.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/30/2018] [Indexed: 12/01/2022]
Abstract
Lamisil (terbinafine) may cause idiosyncratic liver toxicity through a proposed toxicological mechanism involving the reactive metabolite 6,6-dimethyl-2-hepten-4-ynal (TBF-A). TBF-A toxicological relevance remains unclear due to a lack of identification of pathways leading to and competing with TBF-A formation. We resolved this knowledge gap by combining computational modeling and experimental kinetics of in vitro hepatic N-dealkylation of terbinafine. A deep learning model of N-dealkylation predicted a high probability for N-demethylation to yield desmethyl-terbinafine followed by N-dealkylation to TBF-A and marginal contributions from other possible pathways. We carried out steady-state kinetic experiments with pooled human liver microsomes that relied on development of labeling methods to expand metabolite characterization. Those efforts revealed high levels of TBF-A formation and first order decay during metabolic reactions; actual TBF-A levels would then reflect the balance between those processes as well as reflect the impact of stabilizing adduction with glutathione and other biological molecules. Modeling predictions and experimental studies agreed on the significance of N-demethylation and insignificance of N-denaphthylation in terbinafine metabolism, yet differed on importance of direct TBF-A formation. Under steady-state conditions, the direct pathway was the most important source of the reactive metabolite with a Vmax/Km of 4.0 pmol/min/mg protein/µM in contrast to model predictions. Nevertheless, previous studies show that therapeutic dosing leads to accumulation of desmethyl-terbinafine in plasma, which means that likely sources for TBF-A would draw from metabolism of both the major metabolite and parent drug based on our modeling and experimental studies. Through this combination of novel modeling and experimental approaches, we are the first to identify pathways leading to generation of TBF-A for assessing its role in idiosyncratic adverse drug interactions.
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Affiliation(s)
- Dustyn A Barnette
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Mary A Davis
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Na L Dang
- Department of Pathology and Immunology, Washington University, St. Louis, MO 63130, United States
| | - Anirudh S Pidugu
- Department of Neuroscience and Behavioral Biology, Emory University, Atlanta, GA 30322, United States
| | - Tyler Hughes
- Department of Pathology and Immunology, Washington University, St. Louis, MO 63130, United States
| | - S Joshua Swamidass
- Department of Pathology and Immunology, Washington University, St. Louis, MO 63130, United States
| | - Gunnar Boysen
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States
| | - Grover P Miller
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States.
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11
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Chen T, Lee SW, Abelt CJ. 1,5-Prodan Emits from a Planar Intramolecular Charge-Transfer Excited State. ACS OMEGA 2018; 3:4816-4823. [PMID: 31458698 PMCID: PMC6641964 DOI: 10.1021/acsomega.8b00423] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/20/2018] [Indexed: 06/10/2023]
Abstract
1-Propionyl-5-dimethylaminonaphthalene (8, 1,5-Prodan) and two derivatives where the amino group is constrained in a seven-membered (9) and five-membered (10) ring are prepared. All three exhibit strong fluorescence and similar degrees of solvatochromism. Their fluorescence is strongly quenched in alcohol solvents. Because the amino group in 9 and especially 10 is forced to be coplanar with the naphthalene ring, the similar photophysical behavior of all three suggests that emission arises from a planar excited state (planar intramolecular charge transfer).
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12
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Yokoo H, Ohsaki A, Kagechika H, Hirano T. Unique Properties of 1,5-Naphthyridin-2(1H
)-one Derivatives as Environment-Polarity-Sensitive Fluorescent Dyes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hidetomo Yokoo
- Institute of Biomaterials and Bioengineering; Tokyo Medical and Dental University (TMDU); 2-3-10 Kanda-Surugadai 101-0062 Chiyoda-ku, Tokyo Japan
| | - Ayumi Ohsaki
- College of Humanities and Sciences; Nihon University; 3-25-40 Sakurajosui 156-8550 Setagaya-ku, Tokyo Japan
| | - Hiroyuki Kagechika
- Institute of Biomaterials and Bioengineering; Tokyo Medical and Dental University (TMDU); 2-3-10 Kanda-Surugadai 101-0062 Chiyoda-ku, Tokyo Japan
| | - Tomoya Hirano
- Institute of Biomaterials and Bioengineering; Tokyo Medical and Dental University (TMDU); 2-3-10 Kanda-Surugadai 101-0062 Chiyoda-ku, Tokyo Japan
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13
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Ducharme J, Auclair K. Use of bioconjugation with cytochrome P450 enzymes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017. [PMID: 28625736 DOI: 10.1016/j.bbapap.2017.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bioconjugation, defined as chemical modification of biomolecules, is widely employed in biological and biophysical studies. It can expand functional diversity and enable applications ranging from biocatalysis, biosensing and even therapy. This review summarizes how chemical modifications of cytochrome P450 enzymes (P450s or CYPs) have contributed to improving our understanding of these enzymes. Genetic modifications of P450s have also proven very useful but are not covered in this review. Bioconjugation has served to gain structural information and investigate the mechanism of P450s via photoaffinity labeling, mechanism-based inhibition (MBI) and fluorescence studies. P450 surface acetylation and protein cross-linking have contributed to the investigation of protein complexes formation involving P450 and its redox partner or other P450 enzymes. Finally, covalent immobilization on polymer surfaces or electrodes has benefited the areas of biocatalysis and biosensor design. This article is part of a Special Issue entitled: Cytochrome P450 biodiversity and biotechnology, edited by Erika Plettner, Gianfranco Gilardi, Luet Wong, Vlada Urlacher, Jared Goldstone.
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Affiliation(s)
- Julie Ducharme
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Karine Auclair
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada.
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14
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Li S, Johansson M, Vidanarachchi JK, Pickova J, Zamaratskaia G. Determination of biogenic amines in aerobically stored beef using high-performance thin-layer chromatography densitometry. ACTA AGR SCAND A-AN 2017. [DOI: 10.1080/09064702.2017.1315455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S. Li
- School of Food Science and Technology, Dalian Polytechnic University; National Engineering Research Center of Seafood, Dalian, People’s Republic of China
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
- College of Food Science and Technology, Bohai University, Jinzhou, People’s Republic of China
| | - M. Johansson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - J. K. Vidanarachchi
- Department of Animal Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka
| | - J. Pickova
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - G. Zamaratskaia
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
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15
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Suzuki T, Kohno JY. Collisional Reaction of Liquid Droplets: Amidation of Dansyl Chloride Observed by Fluorescence Enhancement. CHEM LETT 2015. [DOI: 10.1246/cl.150753] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Tomoko Suzuki
- Department of Chemistry, Faculty of Science, Gakushuin University
| | - Jun-ya Kohno
- Department of Chemistry, Faculty of Science, Gakushuin University
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16
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Koniev O, Wagner A. Developments and recent advancements in the field of endogenous amino acid selective bond forming reactions for bioconjugation. Chem Soc Rev 2015; 44:5495-551. [PMID: 26000775 DOI: 10.1039/c5cs00048c] [Citation(s) in RCA: 391] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Bioconjugation methodologies have proven to play a central enabling role in the recent development of biotherapeutics and chemical biology approaches. Recent endeavours in these fields shed light on unprecedented chemical challenges to attain bioselectivity, biocompatibility, and biostability required by modern applications. In this review the current developments in various techniques of selective bond forming reactions of proteins and peptides were highlighted. The utility of each endogenous amino acid-selective conjugation methodology in the fields of biology and protein science has been surveyed with emphasis on the most relevant among reported transformations; selectivity and practical use have been discussed.
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Affiliation(s)
- Oleksandr Koniev
- Laboratory of Functional Chemo-Systems (UMR 7199), Labex Medalis, University of Strasbourg, 74 Route du Rhin, 67401 Illkirch-Graffenstaden, France.
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17
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Anantharaj S, Jayakannan M. Amyloid-Like Hierarchical Helical Fibrils and Conformational Reversibility in Functional Polyesters Based on l-Amino Acids. Biomacromolecules 2015; 16:1009-20. [DOI: 10.1021/bm501903t] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Santhanaraj Anantharaj
- Department of Chemistry, Indian Institute of Science Education and Research (IISER)-Pune, Dr. Homi
Bhabha Road, Pune − 411008, Maharashtra, India
| | - Manickam Jayakannan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER)-Pune, Dr. Homi
Bhabha Road, Pune − 411008, Maharashtra, India
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18
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Liao FY, Lin YC, Chen YL, Feng CH. Determination of tranexamic acid in various matrices using microwave-assisted derivatization followed by dispersive liquid–liquid microextraction. J Chromatogr A 2015; 1377:35-45. [DOI: 10.1016/j.chroma.2014.12.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 11/13/2014] [Accepted: 12/05/2014] [Indexed: 10/24/2022]
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19
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Mu X, Qi L, Qiao J, Yang X, Ma H. Enantioseparation of dansyl amino acids and dipeptides by chiral ligand exchange capillary electrophoresis based on Zn(II)-L-hydroxyproline complexes coordinating with γ-cyclodextrins. Anal Chim Acta 2014; 846:68-74. [PMID: 25220143 DOI: 10.1016/j.aca.2014.07.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/08/2014] [Accepted: 07/12/2014] [Indexed: 11/25/2022]
Abstract
A chiral ligand exchange capillary electrophoresis (CLE-CE) method using Zn(II) as the central ion and L-4-hydroxyproline as the chiral ligand coordinating with γ-cyclodextrin (γ-CD) was developed for the enantioseparation of amino acids (AAs) and dipeptides. The effects of various separation parameters, including the pH of the running buffer, the ratio of Zn(II) to L-4-hydroxyproline, the concentration of complexes and cyclodextrins (CDs) were systematically investigated. After optimization, it has been found that eight pairs of labeled AAs and six pairs of labeled dipeptides could be baseline-separated with a running electrolyte of 100.0mM boric acid, 5.0mM ammonium acetate, 3.0mM Zn(II), 6.0mM L-hydroxyproline and 4.0mM γ-CD at pH 8.2. The quantitation of AAs and dipeptides was conducted and good linearity (r(2)≥0.997) and favorable repeatability (RSD≤3.6%) were obtained. Furthermore, the proposed method was applied in determining the enantiomeric purity of AAs and dipeptides. Meanwhile, the possible enantiorecognition mechanism based on the synergistic effect of chiral metal complexes and γ-CD was explored and discussed briefly.
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Affiliation(s)
- Xiaoyu Mu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Li Qi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Juan Qiao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Huimin Ma
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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20
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Yang YX, Mu CL, Zhang JF, Zhu WY. Determination of Biogenic Amines in Digesta by High Performance Liquid Chromatography with Precolumn Dansylation. ANAL LETT 2014. [DOI: 10.1080/00032719.2013.871550] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Healy J, Ekkerman S, Pliotas C, Richard M, Bartlett W, Grayer SC, Morris GM, Miller S, Booth IR, Conway SJ, Rasmussen T. Understanding the structural requirements for activators of the Kef bacterial potassium efflux system. Biochemistry 2014; 53:1982-92. [PMID: 24601535 PMCID: PMC4004266 DOI: 10.1021/bi5001118] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The potassium efflux system, Kef, protects bacteria against the detrimental effects of electrophilic compounds via acidification of the cytoplasm. Kef is inhibited by glutathione (GSH) but activated by glutathione-S-conjugates (GS-X) formed in the presence of electrophiles. GSH and GS-X bind to overlapping sites on Kef, which are located in a cytosolic regulatory domain. The central paradox of this activation mechanism is that GSH is abundant in cells (at concentrations of ∼10-20 mM), and thus, activating ligands must possess a high differential over GSH in their affinity for Kef. To investigate the structural requirements for binding of a ligand to Kef, a novel fluorescent reporter ligand, S-{[5-(dimethylamino)naphthalen-1-yl]sulfonylaminopropyl} glutathione (DNGSH), was synthesized. By competition assays using DNGSH, complemented by direct binding assays and thermal shift measurements, we show that the well-characterized Kef activator, N-ethylsuccinimido-S-glutathione, has a 10-20-fold higher affinity for Kef than GSH. In contrast, another native ligand that is a poor activator, S-lactoylglutathione, exhibits a similar Kef affinity to GSH. Synthetic ligands were synthesized to contain either rigid or flexible structures and investigated as ligands for Kef. Compounds with rigid structures and high affinity activated Kef. In contrast, flexible ligands with similar binding affinities did not activate Kef. These data provide insight into the structural requirements for Kef gating, paving the way for the development of a screen for potential therapeutic lead compounds targeting the Kef system.
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Affiliation(s)
- Jessica Healy
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford , Mansfield Road, Oxford OX1 3TA, United Kingdom
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22
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Szterk A, Roszko M. SIMULTANEOUS DETERMINATION OF FREE AMINO ACIDS, L-CARNOSINE, PURINE, PYRIMIDINE, AND NUCLEOSIDES IN MEAT BY LIQUID CHROMATOGRAPHY/SINGLE QUADRUPOLE MASS SPECTROMETRY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2012.758136] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Arkadiusz Szterk
- a Department of Functional Food and Commodities Faculty of Human Nutrition and Consumer Sciences , Warsaw University of Life Sciences , Warsaw , Poland
| | - Marek Roszko
- b Department of Food Analysis , Institute of Agricultural and Food Biotechnology , Warsaw , Poland
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23
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Redolfi Riva E, Desii A, Sartini S, La Motta C, Mazzolai B, Mattoli V. PMMA/polysaccharides nanofilm loaded with adenosine deaminase inhibitor for targeted anti-inflammatory drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13190-7. [PMID: 24073802 DOI: 10.1021/la402229k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A novel drug delivery vector, a free-standing polymeric ultrathin film (nanofilm) composed of PMMA and a polysaccharides multilayer, is presented. Chitosan and sodium alginate are alternatively deposited by spin-assisted LbL assembly onto a plasma-treated PMMA thin film. Hydrophobic anti-inflammatory drugs, an adenosine deaminase inhibitor (APP) and its fluorescent dansyl derivate (APP-Dns), are encapsulated inside the LbL multilayer using a simple casting deposition procedure. The resulting drug loaded nanofilm can be suspended in water upon dissolution of a PVA sacrificial layer. Morphological characterization of the nanofilm shows that PMMA/LbL nanofilms possess nanometric thickness (<200 nm) and very low surface roughness (1-2 nm for drug loaded nanofilms and <1 nm for blank nanofilm). Drug loaded films exhibit a diffusion controlled release mechanism following the Korsmayer-Peppas release model, confirmed by the fit of release data with a characteristic power law. Drug release is impaired through the PMMA layer, which acts effectively as a barrier for drug transport. This ultrathin polymer film can find application as a nanopatch for targeted inflammatory drug delivery to treat localized pathologies as inflammatory bowel disease.
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Affiliation(s)
- Eugenio Redolfi Riva
- Center for Micro-BioRobotics @SSSA, Istituto Italiano di Tecnologia , Viale Rinaldo Piaggio 34 Pontedera, Pisa, 56025, Italy
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24
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Differential isotope dansylation labeling combined with liquid chromatography mass spectrometry for quantification of intact and N-terminal truncated proteins. Anal Chim Acta 2013; 792:79-85. [DOI: 10.1016/j.aca.2013.05.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 05/14/2013] [Accepted: 05/22/2013] [Indexed: 11/19/2022]
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25
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Zheng J, Dixon RA, Li L. Development of isotope labeling LC-MS for human salivary metabolomics and application to profiling metabolome changes associated with mild cognitive impairment. Anal Chem 2012; 84:10802-11. [PMID: 23150892 DOI: 10.1021/ac3028307] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Saliva is a readily available biofluid that may contain metabolites of interest for diagnosis and prognosis of diseases. In this work, a differential (13)C/(12)C isotope dansylation labeling method, combined with liquid chromatography Fourier transform ion cyclotron resonance mass spectrometry (LC-FTICR-MS), is described for quantitative profiling of the human salivary metabolome. New strategies are presented to optimize the sample preparation and LC-MS detection processes. The strategies allow the use of as little of 5 μL of saliva sample as a starting material to determine the concentration changes of an average of 1058 ion pairs or putative metabolites in comparative saliva samples. The overall workflow consists of several steps including acetone-induced protein precipitation, (12)C-dansylation labeling of the metabolites, and LC-UV measurement of the total concentration of the labeled metabolites in individual saliva samples. A pooled sample was prepared from all the individual samples and labeled with (13)C-dansylation to serve as a reference. Using this metabolome profiling method, it was found that compatible metabolome results could be obtained after saliva samples were stored in tubes normally used for genetic material collection at room temperature, -20 °C freezer, and -80 °C freezer over a period of 1 month, suggesting that many saliva samples already collected in genomic studies could become a valuable resource for metabolomics studies, although the effect of much longer term of storage remains to be determined. Finally, the developed method was applied for analyzing the metabolome changes of two different groups: normal healthy older adults and comparable older adults with mild cognitive impairment (MCI). Top-ranked 18 metabolites successfully distinguished the two groups, among which seven metabolites were putatively identified while one metabolite, taurine, was definitively identified.
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Affiliation(s)
- Jiamin Zheng
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
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26
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Cai HL, Zhu RH, Li HD, Zhang J, Li LF. MultiSimplex optimization of chromatographic separation and dansyl derivatization conditions in the ultra performance liquid chromatography–tandem mass spectrometry analysis of risperidone, 9-hydroxyrisperidone, monoamine and amino acid neurotransmitters in human urine. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1993-9. [DOI: 10.1016/j.jchromb.2011.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Revised: 05/02/2011] [Accepted: 05/02/2011] [Indexed: 10/18/2022]
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27
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De D, Chakraborty PD, Bhattacharyya D. Regulation of trypsin activity by peptide fraction of an aqueous extract of human placenta used as wound healer. J Cell Physiol 2011; 226:2033-40. [DOI: 10.1002/jcp.22535] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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De Bock L, Vande Casteele SR, Mulliez SM, Boussery K, Van Bocxlaer JF. In vitro cytochrome P450 activity: Development and validation of a sensitive high performance liquid chromatography–tandem mass spectrometry method for the quantification of six probe metabolites after derivatization with pyridine-3-sulfonyl chloride in an aqueous environment. J Chromatogr A 2011; 1218:793-801. [DOI: 10.1016/j.chroma.2010.12.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 11/30/2010] [Accepted: 12/12/2010] [Indexed: 10/18/2022]
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29
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Chiappetta G, Ndiaye S, Demey E, Haddad I, Marino G, Amoresano A, Vinh J. Dansyl-peptides matrix-assisted laser desorption/ionization mass spectrometric (MALDI-MS) and tandem mass spectrometric (MS/MS) features improve the liquid chromatography/MALDI-MS/MS analysis of the proteome. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2010; 24:3021-3032. [PMID: 20872635 DOI: 10.1002/rcm.4734] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Peptide tagging is a useful tool to improve matrix-assisted laser desorption/ionization tandem mass spectrometric (MALDI-MS/MS) analysis. We present a new application of the use of the dansyl chloride (DNS-Cl). DNS-Cl is a specific primary amine reagent widely used in protein biochemistry. It adds a fluorescent dimethylaminonaphthalene moiety to the molecule. The evaluation of MALDI-MS and MS/MS analyses of dansylated peptides shows that dansylation raises the ionization efficiency of the most hydrophilic species compared with the most hydrophobic ones. Consequently, higher Mascot scores and protein sequence coverage are obtained by combining MS and MS/MS data of native and tagged samples. The N-terminal DNS-Cl sulfonation improves the peptide fragmentation and promotes the generation of b-fragments allowing better peptide sequencing. In addition, we set up a labeling protocol based on the microwave chemistry. Peptide dansylation proved to be a rapid and cheap method to improve the performance of liquid chromatography (LC)/MALDI-MS/MS analysis at the proteomic scale in terms of peptide detection and sequence coverage.
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Affiliation(s)
- Giovanni Chiappetta
- USR 3149 CNRS/ESPCI ParisTech, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, Paris, France.
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30
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Tang Z, Guengerich FP. Dansylation of unactivated alcohols for improved mass spectral sensitivity and application to analysis of cytochrome P450 oxidation products in tissue extracts. Anal Chem 2010; 82:7706-12. [PMID: 20795636 PMCID: PMC2941762 DOI: 10.1021/ac1015497] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chemical derivatization is useful for improving the ionization characteristics of poorly or nonionizable analytes in liquid chromatography-mass spectrometry (LC-MS). Dansyl chloride has been widely used as a derivatizing reagent for fluorescence detection and for facilitating the MS detection of phenols and amines, but not for general alcohols. A new dansylation method for improving the mass spectral sensitivity of unactivated alcohols was developed. The dansylated derivative was formed after incubation of the test compound cholesterol and excess dansyl chloride in CH(2)Cl(2) in the presence of 4-(dimethylamino)-pyridine (DMAP) plus N,N-diisopropylethylamine at 65 °C for 1 h, with an overall yield of 96%. The versatility of dansylation was investigated by utilizing representative lipid compounds (containing different numbers of hydroxy groups) for dansylation. All dansylated derivatives of the selected compounds were detected by LC-MS/MS in the electrospray ionization (ESI) positive ion mode. Validation of the method was established in terms of the sensitivity, stability, and repeatability of dansylation. The method was then applied to characterizing the P450 7A1 oxidation product (dansylated 7α-hydroxycholesterol) in human liver extracts using an LC-MS metabolomics/isotopic labeling approach (Tang, Z.; Guengerich, F. P. Anal. Chem. 2009, 81, 3071-3078). The dansylated derivative of the product was identified, with the signal increased by 10(3)-fold compared with a previous method (derivatization with succinic anhydride and ESI negative ion MS). Quantitation of testosterone in human liver extracts was also done as an example of the application of the dansylation method. Thus, dansylation is a potential method of modifying many alcohols for detection by fluorescence and LC-MS analysis.
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Affiliation(s)
- Zhongmei Tang
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146
| | - F. Peter Guengerich
- Department of Biochemistry and Center in Molecular Toxicology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0146
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31
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Burr B, Burr FA, Rubenstein I, Simon MN. Purification and translation of zein messenger RNA from maize endosperm protein bodies. Proc Natl Acad Sci U S A 2010; 75:696-700. [PMID: 16592496 PMCID: PMC411323 DOI: 10.1073/pnas.75.2.696] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The messenger RNAs coding for the zein storage protein have been purified from other contaminating RNAs. The average molecular lengths are 1.1-1.2 kilobases, as determined by polyacrylamide gel electrophoresis and by electron microscopy. Products of messenger-dependent protein synthesis in vitro appear to be 1100 and 2000 daltons heavier than the native polypeptides. Zein is like secretory proteins in having a precursor with an additional amino-terminal sequence. Although only one mRNA is seen in polyacrylamide gel electrophoresis, the combined size of the polypeptide products formed exceeds the coding capacity for one message of the size determined in this study. This suggests that there are at least two mRNAs of similar sizes for the zein polypeptides rather than one dicistronic message.
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Affiliation(s)
- B Burr
- Biology Department, Brookhaven National Laboratory, Upton, New York 11973
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32
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Aronson JN, Arvidson HC. Toxic Trypsin Digest Fragment from the Bacillus thuringiensis Parasporal Protein. Appl Environ Microbiol 2010; 53:416-21. [PMID: 16347290 PMCID: PMC203675 DOI: 10.1128/aem.53.2.416-421.1987] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Enzymatic digestion in vitro of the Bacillus thuringiensis protoxin presumably releases and activates the toxin in a manner analogous to that which occurs when a B. thuringiensis sporulated fermentation preparation passes through the midgut of a lepidopteran larva. Therefore, a sporulated culture of B. thuringiensis subsp. kurstaki (serotype 3a3b) HD-263 was treated with trypsin to release an activated toxin soluble in bicarbonate buffer. A 63-kilodalton protein, toxic to cabbage looper larvae (Trichoplusia ni) and to lepidopteran cells in culture, was purified to homogeneity from this trypsin digest. The larvicide, a glycoprotein containing 5% carbohydrate (wt/wt), was purified from the soluble B. thuringiensis trypsin digest by using ammonium sulfate precipitation, anion-exchange chromatography, and hydrophobic-interaction chromatography. Its amino acid composition was high in nonpolar residues and unusually low in lysine and histidine. The isoelectric point was 6.5, and the amino acid on the N terminus was identified as isoleucine. The toxin was only slightly soluble in aqueous buffers unless the chaotropic agent potassium thiocyanate was added. Partial characterization of the toxin indicated that it corresponds well with reported sequences deduced from cloned genes.
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Affiliation(s)
- J N Aronson
- Department of Chemistry, State University of New York, Albany, New York 12222
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33
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Abstract
Although tetanus toxins from cell and culture filtrate appear indistinguishable by several criteria, only the filtrate toxin can be cleaved into two chains by disulfide scission. These chains approximate molecular weights of 95,000 and 55,000. Determinations of sulfhydryl groups and total half-cystine residues for both the cell and filtrate toxins gave values of approximately six and nine, respectively and in filtrate toxin the half-cystine residues are found evenly distributed between the two chains.
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Maeda K, McKenzie HA, Shaw DC. Comparison of bovine serum transferrin A and D2. II. Glycopeptides. ANIMAL BLOOD GROUPS AND BIOCHEMICAL GENETICS 2009; 15:313-22. [PMID: 6395724 DOI: 10.1111/j.1365-2052.1984.tb01130.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Glycopeptides are isolated from subtilisin and pronase digests of whole bovine serum transferrin A and D2. The two variants yield glycopeptides with identical amino acid composition. Hence, there is probably no amino acid substitution in this region of the peptide chain. Amino acid sequence determination of one glycopeptide (subtilisin glycopeptide 8) gives the sequence: (CHO)Asn-Ser-Ser-Leu-Cys. This sequence is identical with that of residues 491-495 of the sequence for human serum transferrin (MacGillivray et al., 1982) except that in the bovine transferrin, Asp is replaced by Asn, enabling carbohydrate attachment. A second glycopeptide sequence Arg-(CHO)Asn-Ala-Thr-Tyr is observed, and the significance discussed in relation to carbohydrate moieties of serum glycoproteins.
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35
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Guo K, Li L. Differential 12C-/13C-Isotope Dansylation Labeling and Fast Liquid Chromatography/Mass Spectrometry for Absolute and Relative Quantification of the Metabolome. Anal Chem 2009; 81:3919-32. [DOI: 10.1021/ac900166a] [Citation(s) in RCA: 306] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kevin Guo
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada
| | - Liang Li
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada
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36
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Plancot MT, Delacourte A, Han KK, Dautrevaux M, Biserte G. Isolation and characterization of highly purified alpha-1-antitrypsin. INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 2009; 10:113-9. [PMID: 302242 DOI: 10.1111/j.1399-3011.1977.tb02784.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Highly purified human alpha-1-antitrypsin (phenotype MM) was obtained by an original method of preparative electrophoresis. The criteria of homogeneity were assured by one arc in crossed immunoelectrophoresis and one band on polyacrylamide gel. A unique N-terminal amino acid (pyroglutamic acid) and a unique C-terminal residue (lysine) were identified. Determined by gel electrophoresis, its molecular weight was 47,000 daltons.
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37
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Dyckes DF, Bodanszky M. Concanavalin A: the sequence of the C-terminal nonapeptide and of a heptapeptide. INTERNATIONAL JOURNAL OF PROTEIN RESEARCH 2009; 4:29-35. [PMID: 5067083 DOI: 10.1111/j.1399-3011.1972.tb03395.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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38
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Debuire B, Han KK, Dautrevaux M, Biserte G. Isolation and characterization of the cyanogen bromide fragments of lobster arginine kinase (homarus vulgaris). INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 2009; 7:69-80. [PMID: 164417 DOI: 10.1111/j.1399-3011.1975.tb02415.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Arginine kinase was aminoethylated in order to block the five free thiol groups on the native enzyme, and then submitted to BrCN cleavage. The BrCN resulting peptides were soluble in propionic acid (10 percent) and subsequently submitted to gel-filtration. The large polypeptide subfractions were citraconylated and resubmitted to differnt gelchromatographies, whereas the short peptide subfractions were submitted to preparative paper electrochromatographies. Eight peptides of 2, 11, 17, 25, 61, 82, 86 and 132 amino acid residues were isolated, one of which is the overlapping of two peptides. The amino acid composition and the end group of all the isolated peptides were established. The short peptides (2, 11 and 17 residues) were sequenced. All peptides possess homoserine at C-terminal position because one methionyl residue is situated at the C-terminal position in the native protein. The polypeptide with 132 residues possessed N-acetylated residue at N-terminal position: therefore this polypeptide is located at the N-terminal position in the protein. The sum and account of each amino acid of the seven isolated peptides were compared to those of the intact protein: the sum of the seven peptides is 331 amino acid residues, whereas the whole protein contains 342 residues. The molecular weight of arginine kinase is revised and calculated on the basis of the present results (37, 687).
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40
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Martín P, Polo C, Cabezudo MD, Dabrio MV. Dansyl Amino-Acids Behavior on a Radial Pak C18 Column. Derivatization of Grape Wine Musts, Wines, and Wine Vinegars. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918408073984] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Paloma Martín
- a Instituto de Fermentaciones Industriales , Juan de la Cierva, 3, Madrid , 6 , Spain
| | - Carmen Polo
- a Instituto de Fermentaciones Industriales , Juan de la Cierva, 3, Madrid , 6 , Spain
| | - M. Dolores Cabezudo
- a Instituto de Fermentaciones Industriales , Juan de la Cierva, 3, Madrid , 6 , Spain
| | - Manuel V. Dabrio
- b Instituto de Química Orgánica General. (C.S.I.C.) , Juan de la Cierva, 3., Madrid , 6 , Spain
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41
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Kneifel H, Jandel AS. Rapid Amino Acid Analysis in Biotechnology: Determination of Alanine and Aspartic Acid. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918308064860] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Shevchenko KV, Nagaev II, Alfeeva LI, Andreeva LA, Kamenskiĭ AA, Levitskaia NG, Shevchenko VP, Grivennikov IA, Miasoedov NF. [Kinetics of Semax penetration into the brain and blood of rats after its intranasal administration]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2006; 32:64-70. [PMID: 16523722 DOI: 10.1134/s1068162006010055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The radioactive peptide analogue Semax corresponding to the ACTH(4-10) sequence (Met-Glu-His-Phe-Pro-Gly-Pro) with a molar radioactivity of 56 Ci/mmol labeled with tritium at the C-terminal Pro was prepared. The labeled peptide was used for studying the kinetics of Semax penetration into rat brain and blood after its intranasal administration (50 microg/kg, 20 microl of solution) to nonbred white rats of body mass 200-250 g. It was demonstrated that 0.093% of the total introduced radioactivity per gram can be found in the rat brain 2 min after the administration, 80% of this radioactivity belonged to Semax, and the rest, to its metabolites. The peptide undergoes rapid enzymatic degradation, with the tripeptide Pro-Gly-Pro prevailing in biological samples relative to the total content of Semax and its metabolites.
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Kawai Y. Purification and characterization of pertucin produced by Pseudomonas pertucinogena. Antimicrob Agents Chemother 2005; 6:347-59. [PMID: 15830486 PMCID: PMC444650 DOI: 10.1128/aac.6.3.347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pertucin, a bacteriocin active against phase I organisms of Bordetella pertussis, was extracted from Pseudomonas pertucinogena, strain 190 or 6627, by freezing and thawing of bacteria-free agar medium and was purified by ammonium sulfate fractionation, dialysis, zinc chloride precipitation, and polyacrylamide gel electrophoresis. The specific activity of purified pertucin was approximately 80 times that of the crude extract. The purified pertucin preparation was homogeneous on ultracentrifugal analysis and polyacrylamide gel electrophoresis, and was found to be composed of protein (80%) and carbohydrate (20%), the latter assumed not to be bound covalently to the protein. Neither nucleic acids nor lipids were demonstrated. N-terminal analysis by dansylation revealed only methionine in strain 190 and only glycine in strain 6627. The isoelectric point was found to be 4.8, and the molecular weight was estimated to be 31,500. Amino acid analysis of the protein moiety demonstrated that it contained all of the common amino acids with somewhat more of the hydrophilic amino acids. With respect to thermostability, pH stability, and effects of metal ions and various buffers, pertucin behaves like a protein and is stable in 0.05 M tris(hydroxymethyl)aminomethane buffer, pH 8.0, containing 0.01 M Ca(2+).
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Hasegawa G, Kikuchi M, Kobayashi Y, Saito Y. Synthesis and characterization of a novel reagent containing dansyl group, which specifically alkylates sulfhydryl group: An example of application for protein chemistry. ACTA ACUST UNITED AC 2005; 63:33-42. [PMID: 15892976 DOI: 10.1016/j.jbbm.2005.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2004] [Revised: 01/18/2005] [Accepted: 01/25/2005] [Indexed: 11/28/2022]
Abstract
We have synthesized a novel reagent containing dansyl group, iodoacethyl dansylcadaverine (IADC), which specifically alkylates sulfhydryl groups. The carboxyl group of iodoacetic acid was activated with dicyclohexylcarbodiimide and was condensed with amino group of dansylcadaverine. Purity and chemical structure of IADC was confirmed with mass spectrometry (MS) and NMR. IADC alkylated GSH but not GSSG, which was confirmed by MS. The reactivity of IADC with proteins was also investigated with Western blotting using anti-dansyl antibody. IADC reacted only with sulfhydryl-containing proteins. The specificity of the interaction of IADC with sulfhydryl groups in proteins was confirmed by adding excessive amount of a well-known sulfhydryl-specific reagent, 5, 5'-dithiobis(2-nitrobenzoic acid), which led to a complete inhibition. To show the usefulness of IADC, the cysteines in glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from chicken muscle were modified with this reagent, and GAPDH was then digested by lysyl endopeptidase. The peptides generated from digestion of IADC-incorporated GAPDH were applied to an anti-dansyl immunoaffinity column. The peptide fragments bound and eluted from the column were separated by HPLC, and the amino acid sequence of each peptide was analyzed, and peptide was identified as the one containing a Cys residue(s). These data showed that IADC is a useful reagent to specifically identify the positions of a Cys residue(s) in proteins.
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Affiliation(s)
- Go Hasegawa
- Department of Biological Sciences, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan
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Yang Z, Rogers LM, Song Y, Guo W, Kolattukudy PE. Homoserine and asparagine are host signals that trigger in planta expression of a pathogenesis gene in Nectria haematococca. Proc Natl Acad Sci U S A 2005; 102:4197-202. [PMID: 15753300 PMCID: PMC554811 DOI: 10.1073/pnas.0500312102] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2004] [Indexed: 11/18/2022] Open
Abstract
Some pathogenesis-related genes are expressed in fungi only when the pathogen is in the host, but the host signals that trigger these gene expressions have not been identified. Virulent Nectria haematococca infects pea plants and requires either pelA, which is induced by pectin, or pelD, which is induced only in planta. However, the host signal(s) that trigger pelD expression was unknown. Here we report the isolation of the host signals and identify homoserine and asparagine, two free amino acids found in uniquely high levels in pea seedlings, as the pelD-inducing signals. N. haematococca has evolved a mechanism to sense the host tissue environment by using the high levels of two free amino acids in this plant, thereby triggering the expression of pelD to assist the pathogenic process.
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Affiliation(s)
- Zhennai Yang
- Biomolecular Science Center and Department of Molecular Biology and Microbiology, Burnett College of Biomedical Sciences, University of Central Florida, Orlando, FL 32816, USA
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Park SJ, Song JS, Kim HJ. Dansylation of tryptic peptides for increased sequence coverage in protein identification by matrix-assisted laser desorption/ionization time-of-flight mass spectrometric peptide mass fingerprinting. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:3089-96. [PMID: 16206124 DOI: 10.1002/rcm.2166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A database search using peptide mass fingerprints obtained by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry leads to protein identification with incomplete sequence coverage, because certain peptides are preferentially desorbed/ionized and some are not detected at all. We show that certain tryptic peptides mainly with C-terminal arginine not detected before derivatization become detectable upon dansylation. Others, mainly with C-terminal lysine, are suppressed. An increase in protein sequence coverage and protein identification score by combined data from underivatized and dansylated peptides in database search is demonstrated using human amnion proteins (human serum albumin precursor, calmodulin, collagen alpha 2(VI) chain precursor, galectin-3) separated by two-dimensional gel electrophoresis as well as femtomole amounts of BSA in solution.
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Affiliation(s)
- Soo-Jin Park
- Department of Chemistry, Seoul National University, Seoul, Korea 151-747
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Dansylation of aromatic, aliphatic, and medicinal carboxylic acid compounds in 1 M Na2CO3 buffer. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00704-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Matsuo H, Baba Y, Nair R, Arimura A, Schally A. Structure of the porcine LH-and FSH-releasing Hormone. J Urol 2002. [DOI: 10.1016/s0022-5347(02)80326-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- H. Matsuo
- V.A. Hospital, New Orleans, LA, USA
- Tulane University School of Medicine, New Orleans, LA, USA
| | - Y. Baba
- V.A. Hospital, New Orleans, LA, USA
- Tulane University School of Medicine, New Orleans, LA, USA
| | - R.M.G. Nair
- V.A. Hospital, New Orleans, LA, USA
- Tulane University School of Medicine, New Orleans, LA, USA
| | - A. Arimura
- V.A. Hospital, New Orleans, LA, USA
- Tulane University School of Medicine, New Orleans, LA, USA
| | - A.V. Schally
- V.A. Hospital, New Orleans, LA, USA
- Tulane University School of Medicine, New Orleans, LA, USA
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Xing G, Wang F, Cui K, Li Z. ASSAY OF NEUROTOXIN β-ODAP AND NON-PROTEIN AMINO ACIDS INLATHYRUS SATIVUSBY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY WITH DANSYLATION. ANAL LETT 2001. [DOI: 10.1081/al-100108411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Schimz A. Localization of the methylation system involved in sensory behavior ofHalobacterium halobiumand its dependence on calcium. FEBS Lett 2001. [DOI: 10.1016/0014-5793(82)80871-5] [Citation(s) in RCA: 22] [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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