1
|
Mendonca C, Zhang L, Waldbauer JR, Aristilde L. Disproportionate Carbon Dioxide Efflux in Bacterial Metabolic Pathways for Different Organic Substrates Leads to Variable Contribution to Carbon-Use Efficiency. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11041-11052. [PMID: 38860668 PMCID: PMC11210201 DOI: 10.1021/acs.est.4c01328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 05/18/2024] [Accepted: 05/22/2024] [Indexed: 06/12/2024]
Abstract
Microbial organic matter turnover is an important contributor to the terrestrial carbon dioxide (CO2) budget. Partitioning of organic carbons into biomass relative to CO2 efflux, termed carbon-use efficiency (CUE), is widely used to characterize organic carbon cycling by soil microorganisms. Recent studies challenge proposals of CUE dependence on the oxidation state of the substrate carbon and implicate instead metabolic strategies. Still unknown are the metabolic mechanisms underlying variability in CUE. We performed a multiomics investigation of these mechanisms in Pseudomonas putida, a versatile soil bacterium of the Gammaproteobacteria, processing a mixture of plant matter derivatives. Our 13C-metabolomics data captured substrate carbons into different metabolic pathways: cellulose-derived sugar carbons in glycolytic and pentose-phosphate pathways; lignin-related aromatic carbons in the tricarboxylic acid cycle. Subsequent 13C-metabolic flux analysis revealed a 3-fold lower investment of sugar carbons in CO2 efflux compared to aromatic carbons, in agreement with reported substrate-dependent CUE. Proteomics analysis revealed enzyme-level regulation only for substrate uptake and initial catabolism, which dictated downstream fluxes through CO2-producing versus biomass-synthesizing reactions. Metabolic partitioning as shown here explained the substrate-dependent CUE calculated from reported metabolic flux analyses of other bacteria, further supporting a metabolism-guided perspective for predicting the microbial conversion of accessible organic matter to CO2 efflux.
Collapse
Affiliation(s)
- Caroll
M. Mendonca
- Department
of Biological and Environmental Engineering, College of Agriculture
and Life Sciences, Cornell University, Ithaca, New York 14853, United States
- Department
of Civil and Environmental Engineering, McCormick School of Engineering
and Applied Science, Northwestern University, Evanston, Illinois 60208, United States
| | - Lichun Zhang
- Department
of the Geophysical Sciences, University
of Chicago, Chicago, Illinois 60637, United States
| | - Jacob R. Waldbauer
- Department
of the Geophysical Sciences, University
of Chicago, Chicago, Illinois 60637, United States
| | - Ludmilla Aristilde
- Department
of Biological and Environmental Engineering, College of Agriculture
and Life Sciences, Cornell University, Ithaca, New York 14853, United States
- Department
of Civil and Environmental Engineering, McCormick School of Engineering
and Applied Science, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
2
|
Jafari S, Hematian Sourki A. Development and Validation of the HPLC Method for Simultaneous Quantification of Glucose and Xylose in Sugar Cane Bagasse Extract. J Chromatogr Sci 2024:bmae018. [PMID: 38704240 DOI: 10.1093/chromsci/bmae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/13/2024] [Accepted: 04/11/2024] [Indexed: 05/06/2024]
Abstract
A validated rapid high-performance liquid chromatography (HPLC)-refractive index (RI) method was developed for the identification and quantification of glucose and xylose in hydrolyzed bagasse extract. The separation of compounds was achieved on Eurokat® H column (300 × 8 mm, 10 μm) at 75°C, using 0.01 N sulfuric acid solution as mobile phase and 0.6 mL/min as flow rate. The method was validated based on accuracy, precision, linearity, robustness, uncertainty, limit of detection (LOD) and limit of quantification (LOQ). Total chromatographic analysis time per sample was ~11 min. Calibration plots were linear over the concentration ranges 11-100 μg/100 μL for glucose and xylose. The LOD was 0.8 ppm and LOQ was 2.5 ppm. The high recovery and low relative standard deviation confirm the suitability of the method for determination of glucose and xylose in bagasse extract. The proposed HPLC-RI method was accurate, fast and robust and required less run time due to less analytes retention times and allowed optimal energy consumption owing to lower column oven temperature.
Collapse
Affiliation(s)
- Saeedeh Jafari
- Iranian Space Research Centre, Mechanics Research Institute, West Fal Asiri Street, District 7, Shiraz, Fars Province, 7155864185, Iran
| | - Abdollah Hematian Sourki
- Department of Food Science and Technology, Faculty of Agriculture, Jahrom University, PO Box: 74135-111, Jahrom, Iran
| |
Collapse
|
3
|
Kosmerl E, González-Orozco BD, García-Cano I, Ortega-Anaya J, Jiménez-Flores R. Milk phospholipids protect Bifidobacterium longum subsp. infantis during in vitro digestion and enhance polysaccharide production. Front Nutr 2023; 10:1194945. [PMID: 38024346 PMCID: PMC10657999 DOI: 10.3389/fnut.2023.1194945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
Bifidobacterium longum subsp. infantis is associated with the gut microbiota of breast-fed infants. Bifidobacterium infantis promotes intestinal barrier and immune function through several proposed mechanisms, including interactions between their surface polysaccharides, the host, and other gut microorganisms. Dairy foods and ingredients are some of the most conspicuous food-based niches for this species and may provide benefits for their delivery and efficacy in the gut. Milk phospholipid (MPL)-rich ingredients have been increasingly recognized for their versatile benefits to health, including interactions with the gut microbiota and intestinal cells. Therefore, our objective was to investigate the capacity for MPL to promote survival of B. infantis during simulated digestion and to modulate bacterial polysaccharide production. To achieve these aims, B. infantis was incubated with or without 0.5% MPL in de Man, Rogosa, and Sharpe (MRS) media at 37°C under anaerobiosis. Survival across the oral, gastric, and intestinal phases using in vitro digestion was measured using plate count, along with adhesion to goblet-like intestinal cells. MPL increased B. infantis survival at the end of the intestinal phase by at least 7% and decreased adhesion to intestinal cells. The bacterial surface characteristics, which may contribute to these effects, were assessed by ζ-potential, changes in surface proteins using comparative proteomics, and production of bound polysaccharides. MPL decreased the surface charge of the bifidobacteria from -17 to -24 mV and increased a 50 kDa protein (3-fold) that appears to be involved in protection from stress. The production of bound polysaccharides was measured using FTIR, HPLC, and TEM imaging. These techniques all suggest an increase in bound polysaccharide production at least 1.7-fold in the presence of MPL. Our results show that MPL treatment increases B. infantis survival during simulated digestion, induces a stress resistance surface protein, and yields greater bound polysaccharide production, suggesting its use as a functional ingredient to enhance probiotic and postbiotic effects.
Collapse
Affiliation(s)
- Erica Kosmerl
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, United States
| | | | - Israel García-Cano
- Department of Food Science and Technology, National Institute of Medical Sciences and Nutrition Salvador Zubirán, Mexico City, Mexico
| | | | - Rafael Jiménez-Flores
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, United States
| |
Collapse
|
4
|
Suresh H, Mikhael M, Ho V, Zhou J. A HPLC-ESI-Q-ToF-MS Method for the Analysis of Monomer Constituents in PHGG, Gum Arabic And Psyllium Husk Prebiotic Dietary Fibre Supplements. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2022. [DOI: 10.1080/10942912.2022.2096064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Harsha Suresh
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
| | - Meena Mikhael
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Mass Spectrometry Unit Research Services, Western Sydney University, Campbelltown, Australia
| | - Vincent Ho
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
- University Medical Clinic of Camden & Campbelltown (UMCCC), Campbelltown, Australia
| | - Jerry Zhou
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
| |
Collapse
|
5
|
Muntean E, Bărăscu N. Soluble Carbohydrates in Several Transylvanian Potato Cultivars. PLANTS (BASEL, SWITZERLAND) 2022; 12:70. [PMID: 36616199 PMCID: PMC9823692 DOI: 10.3390/plants12010070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/09/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
This paper is the first to report the soluble carbohydrate content at harvest for eight Transylvanian potato cultivars: Christian, Cumidava, Kronstadt, Riviera, Roclas, Rustic, Tampa and Zamolxis. The aim of this study is to explore the soluble carbohydrate composition of the above-mentioned cultivars, since such quantitative information is important for breeding programs, consumers and processing units. High performance liquid chromatography was used for analysis, separations being achieved using a Prominence Shimadzu system with a refractive index detector, under isocratic conditions with a mobile phase consisting of acetonitrile: water (80:20%) delivered at 1 mL/min; baseline separations of the target analytes were accomplished with an EC 250/4 Nucleodur 100-5 NH2 RP column in less than 10 min. The carbohydrate concentrations were found to range from 24.03 mg/100 g (Zamolxis) to 76.58 mg/100 g (Riviera) for fructose, while the corresponding range was from 52.78 mg/100 g (Zamolxis) to 232.97 mg/100 g (Riviera) for glucose and from 238.41 mg/100 g (Zamolxis) to 378.45 (Cumidava) for sucrose. Chromatographic data were then subjected to chemometric analysis; the association of these complementary techniques allowed a fast selection of cultivars with low-reducing carbohydrate content for food processing purposes-the cultivars Zamolxis, Kronstadt, Christian and Roclas were outlined exhibiting both the lowest reducing carbohydrate content and the lowest sucrose content.
Collapse
Affiliation(s)
- Edward Muntean
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj Napoca, 3-5 Calea Manaştur, 400372 Cluj Napoca, Romania
| | - Nina Bărăscu
- National Institute for Research and Development for Potato and Sugar Beet Brasov, 2 Fundăturii Str., 500470 Brașov, Romania
| |
Collapse
|
6
|
Lara-Cruz GA, Jaramillo-Botero A. Molecular Level Sucrose Quantification: A Critical Review. SENSORS (BASEL, SWITZERLAND) 2022; 22:9511. [PMID: 36502213 PMCID: PMC9740140 DOI: 10.3390/s22239511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/29/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Sucrose is a primary metabolite in plants, a source of energy, a source of carbon atoms for growth and development, and a regulator of biochemical processes. Most of the traditional analytical chemistry methods for sucrose quantification in plants require sample treatment (with consequent tissue destruction) and complex facilities, that do not allow real-time sucrose quantification at ultra-low concentrations (nM to pM range) under in vivo conditions, limiting our understanding of sucrose roles in plant physiology across different plant tissues and cellular compartments. Some of the above-mentioned problems may be circumvented with the use of bio-compatible ligands for molecular recognition of sucrose. Nevertheless, problems such as the signal-noise ratio, stability, and selectivity are some of the main challenges limiting the use of molecular recognition methods for the in vivo quantification of sucrose. In this review, we provide a critical analysis of the existing analytical chemistry tools, biosensors, and synthetic ligands, for sucrose quantification and discuss the most promising paths to improve upon its limits of detection. Our goal is to highlight the criteria design need for real-time, in vivo, highly sensitive and selective sucrose sensing capabilities to enable further our understanding of living organisms, the development of new plant breeding strategies for increased crop productivity and sustainability, and ultimately to contribute to the overarching need for food security.
Collapse
Affiliation(s)
| | - Andres Jaramillo-Botero
- Omicas Alliance, Pontificia Universidad Javeriana, Cali 760031, Colombia
- Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| |
Collapse
|
7
|
Liu J, Li J, Yi D, Liu Y, Liu R, Xue Y, Huang Q, Liu S, Jiang Y. Non-derivatization strategy for the comprehensive characterization of neutral monosaccharide isomers and neutral disaccharide isomers using hydrophilic interaction liquid chromatography coupled to quadrupole/time-of-flight mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1185:122972. [PMID: 34700132 DOI: 10.1016/j.jchromb.2021.122972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 10/20/2022]
Abstract
Monosaccharide isomers and disaccharide isomers widely exist in nature, playing a key role in a number of important biological processes. However, due to high structural similarity and high polarity, the characterization of monosaccharide isomers, disaccharide isomers, as well as the analysis of monosaccharide composition of polysaccharides by a method that does not require derivatization is an ongoing challenge. Herein, we proposed a simple method for rapid discrimination of non-derivatized neutral monosaccharide, and disaccharide isomers using hydrophilic interaction liquid chromatography coupled to quadrupole/time-of-flight mass spectrometry (HILIC-Q/TOF-MS). In this work, we optimized the experimental parameters, and detailed approaches to discriminate the precursor ions, deprotonated ions, and fragment ions are proposed, as well. To discriminate the various ions, the retention times, the relative abundance (RA) of precursor ions and fragment ions at different collision energies, the relative abundance ratio (RAR) of fragment ions to deprotonated ions or precursor ions were considered for characterization of neutral monosaccharide and disaccharide isomers. Finally, this strategy was successfully applied to analyzing the monosaccharide composition of neutral disaccharides, polysaccharides, and an aqueous extract of Moringa oleifera seeds. The experimental results revealed that the HILIC-Q/TOF-MS is an effective and convenient strategy for rapid differentiation of monosaccharide isomers and disaccharide isomers, which may serve as a general platform for the analysis of neutral polysaccharides, food, medicinal plants, and herbs.
Collapse
Affiliation(s)
- Jing Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Jing Li
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Dan Yi
- Drug Clinical Trial Center, Zhuzhou Central Hospital, Zhuzhou, China
| | - Yanyang Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Rong Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Ying Xue
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Qi Huang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Shao Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China.
| | - Yueping Jiang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Hospital Pharmacy, Central South University, Changsha 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China.
| |
Collapse
|
8
|
Chen H, Chen H, Lu H, Tang X, Zhang H, Chen YQ, Chen W. Carbohydrate analysis of Mortierella alpina by colorimetry and HPLC-ELSD to reveal accumulation differences of sugar and lipid. Biotechnol Lett 2021; 43:1289-1301. [PMID: 33864523 DOI: 10.1007/s10529-021-03120-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 03/23/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To establish reliable methods for the extraction and quantification of the total carbohydrate and intracellular saccharides from Mortierella alpina and study the changes between carbohydrate and lipid in fermentation process. RESULTS The extraction of mycelia with HCl following a photometric phenol-sulphuric acid reaction was identified as an optimal method for total carbohydrate analysis in Mortierella alpina, which the extraction efficiency performed 1.1-3.6 fold than other five methods. The total carbohydrate content increased from initial 19.26 to 25.86% during early fermentation process and declined gradually thereafter, while the fatty acid was increasing from 8.47 to 31.03%. For separation and qualitative estimation of intracellular saccharides, the acetonitrile/water freeze-thaw method for extraction and Sugar-Pak I column for separation proved to be possible. With the glucose rapidly decreasing at the beginning of growth, the trehalose accumulated rapidly from 1.63 to 5.04% and then decreased slightly but maintain above 4% of dry biomass. CONCLUSIONS This work established comprehensive carbohydrate extraction and analysis methods of Mortierella alpina and identified the main saccharide in fermentation process which indicated that the accumulation of fatty acids was related to the change of intracellular carbohydrate content.
Collapse
Affiliation(s)
- Hanqin Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Haiqin Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China. .,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.
| | - Hengqian Lu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Xin Tang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Yong Q Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.,Beijing Innovation Centre of Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, 100048, People's Republic of China
| |
Collapse
|
9
|
Solhtalab M, Klein AR, Aristilde L. Hierarchical Reactivity of Enzyme-Mediated Phosphorus Recycling from Organic Mixtures by Aspergillus niger Phytase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:2295-2305. [PMID: 33305954 DOI: 10.1021/acs.jafc.0c05924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Biological recycling of inorganic phosphorus (Pi) from organic phosphorus (Po) compounds by phosphatase-type enzymes, including phytases, is an important contributor to the pool of bioavailable P to plants and microorganisms. However, studies of mixed-substrate reactions with these enzymes are lacking. Here, we explore the reactivity of a phytase extract from the fungus Aspergillus niger toward a heterogeneous mixture containing, in addition to phytate, different structures of environmentally relevant Po compounds such as ribonucleotides and sugar phosphates. Using a high-resolution liquid chromatography-mass spectrometry method to monitor simultaneously the parent Po compounds and their by-products, we captured sequential substrate-specific evolution of Pi from the mixture, with faster hydrolysis of multiphosphorylated compounds (phytate, diphosphorylated sugars, and di- and tri-phosphorylated ribonucleotides) than hydrolysis of monophosphorylated compounds (monophosphorylated sugars and monophosphorylated ribonucleotides). The interaction mechanisms and energies revealed by molecular docking simulations of each Po compound within the enzyme's active site explained the substrate hierarchy observed experimentally. Specifically, the favorable orientation for binding of the negatively charged phosphate moieties with respect to the positive potential surface of the active site was important. Collectively, our findings provide mechanistic insights about the broad but hierarchical role of phytase-type enzymes in Pi recycling from the heterogeneous assembly of Po compounds in agricultural soils or wastes.
Collapse
Affiliation(s)
- Mina Solhtalab
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
| | - Annaleise R Klein
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
- Department of Civil and Environmental Engineering, McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208, United States
| | - Ludmilla Aristilde
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, United States
- Department of Civil and Environmental Engineering, McCormick School of Engineering and Applied Science, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
10
|
Mendonca CM, Wilkes RA, Aristilde L. Advancements in 13C isotope tracking of synergistic substrate co-utilization in Pseudomonas species and implications for biotechnology applications. Curr Opin Biotechnol 2020; 64:124-133. [DOI: 10.1016/j.copbio.2020.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/07/2020] [Accepted: 02/07/2020] [Indexed: 12/16/2022]
|
11
|
Huang S, Wang J, Guo Z, Wang Y, Liu C. Quantitative Measurement of Melittin in Asian Honeybee Venom Using a New Method Including UPLC-QqTOF-MS. Toxins (Basel) 2020; 12:toxins12070437. [PMID: 32635485 PMCID: PMC7404999 DOI: 10.3390/toxins12070437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 12/28/2022] Open
Abstract
Asian honeybee venom is widely used in traditional oriental medicine. Melittin is the main component of Asian honeybee venom. In the present study, an ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QqTOF-MS) method was used for accurate qualitative and quantitative analyses of melittin in Asian honeybee venom. The results showed that the dynamic linear range of melittin was from 0.094 to 20 μg/mL, and the limit of quantification was 0.3125 μg/mL. The spiking recovery of melittin in honeybee venom ranged from 84.88% to 93.05%. Eighteen Asian honeybee venom samples in eighteen batches were collected from two different zones of China, and their melittin contents were measured. The contents of melittin in Asian honeybee venom samples was 33.9–46.23% of dry weight. This method proved a useful tool for the rapid evaluation of the authenticity and quality of Asian honeybee venom in terms of the melittin contents, and will contribute to a broader understanding of Asian honeybee venom.
Collapse
|
12
|
Wu N, Li J, Zhou M. A novel luminescent sensor for disaccharide detection in food: Synthesis and application of a water-soluble rod-coil ionic block copolymer. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
13
|
Wilkes RA, Mendonca CM, Aristilde L. A Cyclic Metabolic Network in Pseudomonas protegens Pf-5 Prioritizes the Entner-Doudoroff Pathway and Exhibits Substrate Hierarchy during Carbohydrate Co-Utilization. Appl Environ Microbiol 2019; 85:e02084-18. [PMID: 30366991 PMCID: PMC6293094 DOI: 10.1128/aem.02084-18] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 10/17/2018] [Indexed: 11/20/2022] Open
Abstract
The genetic characterization of Pseudomonas protegens Pf-5 was recently completed. However, the inferred metabolic network structure has not yet been evaluated experimentally. Here, we employed 13C-tracers and quantitative flux analysis to investigate the intracellular network for carbohydrate metabolism. In lieu of the direct phosphorylation of glucose by glucose kinase, glucose catabolism was characterized primarily by the oxidation of glucose to gluconate and 2-ketogluconate before the phosphorylation of these metabolites to feed the Entner-Doudoroff (ED) pathway. In the absence of phosphofructokinase activity, a cyclic flux from the ED pathway to the upper Embden-Meyerhof-Parnas (EMP) pathway was responsible for routing glucose-derived carbons to the non-oxidative pentose phosphate (PP) pathway. Consistent with the lack of annotated genes in P. protegens Pf-5 for the transport or initial catabolism of pentoses and galactose, only glucose was assimilated into intracellular metabolites in the presence of xylose, arabinose, or galactose. However, when glucose was fed simultaneously with fructose or mannose, co-uptake of these hexoses was evident, but glucose was preferred over fructose (3 to 1) and over mannose (4 to 1). Despite gene annotation of mannose catabolism to fructose-6-phosphate, metabolite labeling patterns revealed that mannose was assimilated into fructose-1,6-bisphosphate, similarly to fructose catabolism. Remarkably, carbons from mannose and fructose were also found to cycle backward through the upper EMP pathway toward the ED pathway. Therefore, the operational metabolic network for processing carbohydrates in P. protegens Pf-5 prioritizes flux through the ED pathway to channel carbons to EMP, PP, and downstream pathways.IMPORTANCE Species of the Pseudomonas genus thrive in various nutritional environments and have strong biocatalytic potential due to their diverse metabolic capabilities. Carbohydrate substrates are ubiquitous both in environmental matrices and in feedstocks for engineered bioconversion. Here, we investigated the metabolic network for carbohydrate metabolism in Pseudomonas protegens Pf-5. Metabolic flux quantitation revealed the relative involvement of different catabolic routes in channeling carbohydrate carbons through a cyclic metabolic network. We also uncovered that mannose catabolism was similar to fructose catabolism, despite the annotation of a different pathway in the genome. Elucidation of the constitutive metabolic network in P. protegens is important for understanding its innate carbohydrate processing, thus laying the foundation for targeting metabolic engineering of this untapped Pseudomonas species.
Collapse
Affiliation(s)
- Rebecca A Wilkes
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York, USA
| | - Caroll M Mendonca
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York, USA
| | - Ludmilla Aristilde
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York, USA
| |
Collapse
|