1
|
Oku N, Hayashi S, Yamaguchi Y, Takenaka H, Igarashi Y. Nostochopcerol, a new antibacterial monoacylglycerol from the edible cyanobacterium Nostochopsis lobatus. Beilstein J Org Chem 2023; 19:133-138. [PMID: 36793535 PMCID: PMC9924362 DOI: 10.3762/bjoc.19.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/31/2023] [Indexed: 02/11/2023] Open
Abstract
A new antibacterial 3-monoacyl-sn-glycerol, nostochopcerol (1), was isolated from a cultured algal mass of the edible cyanobacterium Nostochopsis lobatus MAC0804NAN. The structure of compound 1 was established by the analysis of NMR and MS data while its chirality was established by comparison of optical rotation values with synthetically prepared authentics. Compound 1 inhibited the growth of Bacillus subtilis and Staphylococcus aureus at MIC of 50 μg/mL and 100 μg/mL, respectively.
Collapse
Affiliation(s)
- Naoya Oku
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Saki Hayashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Yuji Yamaguchi
- MAC Gifu Research Institute, MicroAlgae Corporation, 4-15 Akebono, Gifu 500-8148, Japan
| | - Hiroyuki Takenaka
- MAC Gifu Research Institute, MicroAlgae Corporation, 4-15 Akebono, Gifu 500-8148, Japan
| | - Yasuhiro Igarashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| |
Collapse
|
2
|
Wang H, Yang L, Wang X, Cong P, Xu J, Xue C. Comprehensive Lipidomic Analysis of Three Edible Brown Seaweeds Based on Reversed-Phase Liquid Chromatography Coupled with Quadrupole Time-of-Flight Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4138-4151. [PMID: 35343232 DOI: 10.1021/acs.jafc.1c07513] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A comprehensive lipidomic analysis was performed onto three edible brown seaweeds, namely Laminaria japonica, Undaria pinnatifida, and Scagassum natans, using reversed-phase liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (RPLC-Q-TOF-MS/MS). In total, 675 lipid molecules, including glycolipids (GLs), phospholipids, sphingolipids (SLs), betaine lipids, and glycerolipids, were identified and semiquantified. With the exception of the high content of diacylglycerols found in L. japonica (54.6% of total lipids), GLs were the dominant component in the three brown seaweeds (27.7-56.7% of total lipids), containing a high proportion of eicosapentaenoic acid. Interestingly, SLs represented by ceramide and hexosylceramide containing phytosphingosine and α-hydroxy fatty acid structures were detected in the three brown seaweeds. A large number of acylated GLs were identified and reported for the first time in these seaweeds, including acylated monogalactosyldiacylglycerol and acylated digalactosyldiacylglycerol containing nonoxidized fatty acids. The bioactive lipids identified herein could be considered potential biomarkers for identifying these seaweeds, evaluating their nutritional value and further promoting their utilization.
Collapse
Affiliation(s)
- Haitang Wang
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
| | - Lu Yang
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
| | - Xincen Wang
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
| | - Peixu Cong
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, No. 5, Yushan Road, Qingdao, Shandong Province 266003, China
- Laboratory of Marine Drugs and Biological Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1, Wenhai Road, Qingdao, Shandong Province 266237, China
| |
Collapse
|
3
|
Korany DA, Said RS, Ayoub IM, Labib RM, El-Ahmady SH, Singab ANB. Protective effects of Brownea grandiceps (Jacq.) against ϒ-radiation-induced enteritis in rats in relation to its secondary metabolome fingerprint. Biomed Pharmacother 2022; 146:112603. [PMID: 35062069 DOI: 10.1016/j.biopha.2021.112603] [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: 11/08/2021] [Revised: 12/24/2021] [Accepted: 12/25/2021] [Indexed: 11/30/2022] Open
Abstract
Radiation enteritis is the most common complication of radiotherapy in patients with pelvic malignancies. Thus, the radioprotective activity of the total hydro-alcoholic extract (BGE) and the ethyl acetate soluble fraction (EAF) of Brownea grandiceps leaves was evaluated against ϒ-radiation-induced enteritis in rats. (BGE) and (EAF) were characterized using HPLC-PDA-ESI-MS/MS analysis. The total phenolic and flavonoid contents were also quantified. In vivo administration of (BGE) (400 mg/kg) and (EAF) (200 & 400 mg/kg) prevented intestinal injury and maintained the mucosal integrity of irradiated rats through increasing villi length and promoting crypt regeneration. Also, (EAF) showed more potent antioxidant activity than (BGE) through reduction of MDA level and enhancement of GSH content and catalase enzyme activity. (BGE) and (EAF) down-regulated intestinal NF-κB expression leading to diminished expression of downstream inflammatory cytokine TNF-α. Moreover, (EAF) markedly reduced the expression of profibrotic marker TGF-β1. Seventy-nine compounds were tentatively identified, including flavonoids, proanthocyanidins, polar lipids and phenolic acids. (EAF) showed significantly higher total phenolic and flavonoid contents, as compared to (BGE). Results revealed remarkable radioprotective activity of (BGE) and (EAF), with significantly higher activity for (EAF). The chemical constituents of (BGE) and (EAF) strongly supported their radioprotective activity. To the best of our knowledge, the present study describes for the first time the radioprotective activity of B. grandiceps leaves in relation to its secondary metabolome fingerprint; emphasizing the great promise of B. grandiceps leaves, especially (EAF), to be used as natural radio-protective agent.
Collapse
Affiliation(s)
- Doaa A Korany
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, African Union Organization Street, 11566, Cairo, Egypt.
| | - Riham S Said
- Department of Drug Radiation Research, National Center for Radiation Research & Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Iriny M Ayoub
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, African Union Organization Street, 11566, Cairo, Egypt
| | - Rola M Labib
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, African Union Organization Street, 11566, Cairo, Egypt
| | - Sherweit H El-Ahmady
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, African Union Organization Street, 11566, Cairo, Egypt
| | - Abdel Nasser B Singab
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, African Union Organization Street, 11566, Cairo, Egypt; Center of Drug Discovery Research and Development, Ain Shams University, Cairo, Egypt.
| |
Collapse
|
4
|
Song Y, Zoong Lwe ZS, Wickramasinghe PADBV, Welti R. Head-Group Acylation of Chloroplast Membrane Lipids. Molecules 2021; 26:molecules26051273. [PMID: 33652855 PMCID: PMC7956594 DOI: 10.3390/molecules26051273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 01/24/2023] Open
Abstract
Head group-acylated chloroplast lipids were discovered in the 1960s, but interest was renewed about 15 years ago with the discovery of Arabidopsides E and G, acylated monogalactosyldiacylglycerols with oxidized fatty acyl chains originally identified in Arabidopsis thaliana. Since then, plant biologists have applied the power of mass spectrometry to identify additional oxidized and non-oxidized chloroplast lipids and quantify their levels in response to biotic and abiotic stresses. The enzyme responsible for the head-group acylation of chloroplast lipids was identified as a cytosolic protein closely associated with the chloroplast outer membrane and christened acylated galactolipid-associated phospholipase 1 (AGAP1). Despite many advances, critical questions remain about the biological functions of AGAP1 and its head group-acylated products.
Collapse
Affiliation(s)
- Yu Song
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506, USA; (Y.S.); (Z.S.Z.L.)
- Kansas Lipidomics Research Center, Kansas State University, Manhattan, KS 66506, USA;
| | - Zolian S. Zoong Lwe
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506, USA; (Y.S.); (Z.S.Z.L.)
- Kansas Lipidomics Research Center, Kansas State University, Manhattan, KS 66506, USA;
| | | | - Ruth Welti
- Kansas Lipidomics Research Center, Kansas State University, Manhattan, KS 66506, USA;
- Division of Biology, Kansas State University, Manhattan, KS 66506, USA
- Correspondence:
| |
Collapse
|
5
|
Abedin MR, Barua S. Isolation and purification of glycoglycerolipids to induce apoptosis in breast cancer cells. Sci Rep 2021; 11:1298. [PMID: 33446783 PMCID: PMC7809038 DOI: 10.1038/s41598-020-80484-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 12/17/2020] [Indexed: 01/03/2023] Open
Abstract
Monogalactosyldiacylglycerol (MGDG) is the most abundant type of glycoglycerolipid found in the plant cell membrane and mostly in the chloroplast thylakoid membrane. The amphiphilic nature of MGDG is attractive in pharmaceutical fields for interaction with other biological molecules and hence exerting therapeutic anti-cancer, anti-viral, and anti-inflammatory activities. In this study, we investigated the therapeutic efficacy of cyanobacteria derived MGDG to inhibit breast cancer cell growth. MGDG was extracted from a cyanobacteria Synechocystis sp. PCC 6803 followed by a subsequent fractionation by column chromatographic technique. The purity and molecular structure of MGDG were analyzed by nuclear magnetic resonance (NMR) spectroscopy analysis. The presence of MGDG in the extracted fraction was further confirmed and quantified by high-performance liquid chromatography (HPLC). The anti-proliferation activity of the extracted MGDG molecule was tested against BT-474 and MDA-MB-231 breast cancer cell lines. The in vitro study showed that MGDG extracted from Synechocystis sp. PCC 6803 induced apoptosis in (70 ± 8) % of BT-474 (p < 0.001) and (58 ± 5) % of MDA-MB-231 cells (p < 0.001) using ~ 60 and 200 ng/ml of concentrations, respectively. The half-maximal inhibitory concentration, IC50 of MGDG extracted from Synechocystis sp. PCC 6803 were (27.2 ± 7.6) and (150 ± 70) ng/ml in BT-474 and MDA-MB-231 cell lines, respectively. Quantification of caspase-3/7 activity using flow cytometry showed (3.0 ± 0.4) and (2.1 ± 0.04)-fold (p < 0.001) higher protein expressions in the MGDG treated BT-474 and MDA-MB-231 cells, respectively than untreated controls conferring to the caspase-dependent apoptosis. The MGDG did not show any significant cytotoxic side effects in human dermal fibroblasts cells. A commercially available MGDG control did not induce any apoptotic cell death in cancer cells substantiating the potential of the MGDG extracted from Synechocystis sp. PCC 6803 for the treatment of breast cancer cells through the apoptosis-mediated pathway.
Collapse
Affiliation(s)
- Muhammad Raisul Abedin
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, 110 Bertelsmeyer Hall, 1101 N. State Street, Rolla, MO, 65409-1230, USA
| | - Sutapa Barua
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, 110 Bertelsmeyer Hall, 1101 N. State Street, Rolla, MO, 65409-1230, USA.
| |
Collapse
|
6
|
Morcol TB, Wysocki K, Sankaran RP, Matthews PD, Kennelly EJ. UPLC-QTof-MS E Metabolomics Reveals Changes in Leaf Primary and Secondary Metabolism of Hop ( Humulus lupulus L.) Plants under Drought Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14698-14708. [PMID: 33236890 DOI: 10.1021/acs.jafc.0c05987] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The hop (Humulus lupulus L.) is an important specialty crop used in beer production. Untargeted UPLC-QTof-MSE metabolomics was used to determine metabolite changes in the leaves of hop plants under varying degrees of drought stress. Principal component analysis revealed that drought treatments produced qualitatively distinct changes in the overall chemical composition of three out of four genotypes tested (i.e., Cascade, Sultana, and a wild var. neomexicanus accession but not Aurora), although differences among treatments were smaller than differences among genotypes. A total of 14 compounds consistently increased or decreased in response to drought stress, and this effect was generally progressive as the severity of drought increased. A total of 10 of these marker compounds were tentatively identified as follows: five glycerolipids, glutaric acid, pheophorbide A, abscisic acid, roseoside, and dihydromyricetin. Some of the observed metabolite changes likely occur across all plants under drought conditions, while others may be specific to hops or to the type of drought treatments performed.
Collapse
Affiliation(s)
- Taylan B Morcol
- Department of Biological Sciences, Lehman College, City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
- Ph.D. Program in Biology, The Graduate Center, City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Konrad Wysocki
- Department of Biological Sciences, Lehman College, City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Renuka P Sankaran
- Department of Biological Sciences, Lehman College, City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
- Ph.D. Program in Biology, The Graduate Center, City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Paul D Matthews
- Department of Research and Development, Hopsteiner, S.S. Steiner, Inc., 1 West Washington Avenue, Yakima, Washington 98903, United States
| | - Edward J Kennelly
- Department of Biological Sciences, Lehman College, City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
- Ph.D. Program in Biology, The Graduate Center, City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| |
Collapse
|
7
|
Synthesis and Anti-Influenza A Virus Activity of 6'-amino-6'-deoxy-glucoglycerolipids Analogs. Mar Drugs 2016; 14:md14060116. [PMID: 27322292 PMCID: PMC4926075 DOI: 10.3390/md14060116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/02/2016] [Accepted: 06/03/2016] [Indexed: 01/13/2023] Open
Abstract
A series of aminoglucoglycerolipids derivatives had been synthesized, including 6'-acylamido-glucoglycerolipids 1a-1f and corresponding 2'-acylamido-glucoglycerolipids 2a-2c bearing different fatty acids, glucosyl diglycerides 3a-3e bearing different functional groups at C-6' and ether-linked glucoglycerolipids 4a-4c with double-tailed alkyl alcohol. The anti-influenza A virus (IAV) activity was evaluated by the cytopathic effects (CPE) inhibition assay. The results indicated that the integral structure of the aminoglycoglycerolipid was essential for the inhibition of IAV in MDCK cells. Furthermore, oral administration of compound 1d was able to significantly improve survival and decrease pulmonary viral titers in IAV-infected mice, which suggested that compound 1d merited further investigation as a novel anti-IAV candidate in the future.
Collapse
|
8
|
Nilsson AK, Johansson ON, Fahlberg P, Kommuri M, Töpel M, Bodin LJ, Sikora P, Modarres M, Ekengren S, Nguyen CT, Farmer EE, Olsson O, Ellerström M, Andersson MX. Acylated monogalactosyl diacylglycerol: prevalence in the plant kingdom and identification of an enzyme catalyzing galactolipid head group acylation in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 84:1152-66. [PMID: 26566971 DOI: 10.1111/tpj.13072] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/25/2015] [Accepted: 11/03/2015] [Indexed: 05/25/2023]
Abstract
The lipid phase of the thylakoid membrane is mainly composed of the galactolipids mono- and digalactosyl diacylglycerol (MGDG and DGDG, respectively). It has been known since the late 1960s that MGDG can be acylated with a third fatty acid to the galactose head group (acyl-MGDG) in plant leaf homogenates. In certain brassicaceous plants like Arabidopsis thaliana, the acyl-MGDG frequently incorporates oxidized fatty acids in the form of the jasmonic acid precursor 12-oxo-phytodienoic acid (OPDA). In the present study we further investigated the distribution of acylated and OPDA-containing galactolipids in the plant kingdom. While acyl-MGDG was found to be ubiquitous in green tissue of plants ranging from non-vascular plants to angiosperms, OPDA-containing galactolipids were only present in plants from a few genera. A candidate protein responsible for the acyl transfer was identified in Avena sativa (oat) leaf tissue using biochemical fractionation and proteomics. Knockout of the orthologous gene in A. thaliana resulted in an almost total elimination of the ability to form both non-oxidized and OPDA-containing acyl-MGDG. In addition, heterologous expression of the A. thaliana gene in E. coli demonstrated that the protein catalyzed acylation of MGDG. We thus demonstrate that a phylogenetically conserved enzyme is responsible for the accumulation of acyl-MGDG in A. thaliana. The activity of this enzyme in vivo is strongly enhanced by freezing damage and the hypersensitive response.
Collapse
Affiliation(s)
- Anders K Nilsson
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Oskar N Johansson
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Per Fahlberg
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Murali Kommuri
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Mats Töpel
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Lovisa J Bodin
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Per Sikora
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Masoomeh Modarres
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Sophia Ekengren
- Department of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, Stockholm, SE-106 91, Sweden
| | - Chi T Nguyen
- Department of Plant Molecular Biology, University of Lausanne, Biophore, 1015, Lausanne, Switzerland
| | - Edward E Farmer
- Department of Plant Molecular Biology, University of Lausanne, Biophore, 1015, Lausanne, Switzerland
| | - Olof Olsson
- Department of Pure and Applied Biochemistry, Lund University, Lund, SE-221 00, Sweden
| | - Mats Ellerström
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| | - Mats X Andersson
- Department of Biological- and Environmental Sciences, University of Gothenburg, Box 461, Göteborg, SE-405 30, Sweden
| |
Collapse
|
9
|
Tareq FS, Lee HS, Lee YJ, Lee JS, Shin HJ. Ieodoglucomide C and Ieodoglycolipid, New Glycolipids from a Marine-Derived Bacterium Bacillus licheniformis 09IDYM23. Lipids 2015; 50:513-9. [DOI: 10.1007/s11745-015-4014-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/23/2015] [Indexed: 12/01/2022]
|
10
|
Total synthesis and structure-activity relationship of glycoglycerolipids from marine organisms. Mar Drugs 2014; 12:3634-59. [PMID: 24945415 PMCID: PMC4071594 DOI: 10.3390/md12063634] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/29/2014] [Accepted: 06/10/2014] [Indexed: 12/05/2022] Open
Abstract
Glycoglycerolipids occur widely in natural products, especially in the marine species. Glycoglycerolipids have been shown to possess a variety of bioactivities. This paper will review the different methodologies and strategies for the synthesis of biological glycoglycerolipids and their analogs for bioactivity assay. In addition, the bioactivities and structure-activity relationship of the glycoglycerolipids are also briefly outlined.
Collapse
|
11
|
Structural identities of four glycosylated lipids in the oral bacterium Streptococcus mutans UA159. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1831:1239-49. [PMID: 23562838 DOI: 10.1016/j.bbalip.2013.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/08/2013] [Accepted: 03/25/2013] [Indexed: 02/01/2023]
Abstract
The cariogenic bacterium Streptococcus mutans is an important dental pathogen that forms biofilms on tooth surfaces, which provide a protective niche for the bacterium where it secretes organic acids leading to the demineralization of tooth enamel. Lipids, especially glycolipids are likely to be key components of these biofilm matrices. The UA159 strain of S. mutans was among the earliest microorganisms to have its genome sequenced. While the lipids of other S. mutans strains have been identified and characterized, lipid analyses of UA159 have been limited to a few studies on its fatty acids. Here we report the structures of the four major glycolipids from stationary-phase S. mutans UA159 cells grown in standing cultures. These were shown to be monoglucosyldiacylglycerol (MGDAG), diglucosyldiacylglycerol (DGDAG), diglucosylmonoacylglycerol (DGMAG) and, glycerophosphoryldiglucosyldiacylglycerol (GPDGDAG). The structures were determined by high performance thin-layer chromatography, mass spectrometry and nuclear magnetic resonance spectroscopy. The glycolipids were identified by accurate, high resolution, and tandem mass spectrometry. The identities of the sugar units in the glycolipids were determined by a novel and highly efficient NMR method. All sugars were shown to have α-glycosidic linkages and DGMAG was shown to be acylated in the sn-1 position by NMR. This is the first observation of unsubstituted DGMAG in any organism and the first mass spectrometry data for GPDGDAG.
Collapse
|
12
|
Liengprayoon S, Sriroth K, Dubreucq E, Vaysse L. Glycolipid composition of Hevea brasiliensis latex. PHYTOCHEMISTRY 2011; 72:1902-1913. [PMID: 21605880 DOI: 10.1016/j.phytochem.2011.04.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Revised: 04/22/2011] [Accepted: 04/27/2011] [Indexed: 05/30/2023]
Abstract
Glycolipids of fresh latex from three clones of Hevea brasiliensis were characterized and quantified by HPLC/ESI-MS. Their fatty acyl and sterol components were further confirmed by GC/MS after saponification. The four detected glycolipid classes were steryl glucosides (SG), esterified steryl glucosides (ESG), monogalactosyl diacylglycerols (MGDG) and digalactosyl diacylglycerols (DGDG). Sterols in SG, ESG and total latex unsaponifiable were stigmasterol, β-sitosterol and Δ⁵-avenasterol. The latter was found instead of fucosterol formerly described. Galactolipids were mainly DGDG and had a fatty acid composition different from that of plant leaves as they contained less than 5% C18:3. Glycolipids, which represented 27-37% of total lipids, displayed important clonal variations in the proportions of the different fatty acids. ESG, MGDG and DGDG from clone PB235 differed notably by their higher content in furan fatty acid, which accounted for more than 40% of total fatty acids. Clonal variation was also observed in the relative proportions of glycolipid classes except MGDG (8%), with 43-51% DGDG, 30-34% SG and 7-19% ESG. When compared with other plant cell content, the unusual glycolipid composition of H. brasiliensis latex may be linked to the peculiar nature of this specialized cytoplasm expelled from laticiferous system, especially in terms of functional and structural properties.
Collapse
|
13
|
Kim YH, Kim EH, Lee C, Kim MH, Rho JR. Two new monogalactosyl diacylglycerols from brown alga Sargassum thunbergii. Lipids 2007; 42:395-9. [PMID: 17406933 DOI: 10.1007/s11745-007-3035-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Accepted: 02/01/2007] [Indexed: 10/23/2022]
Abstract
Two new monogalactosyl diacylglycerols (MGDGs) along with two known glycolipids were isolated from the moderate polar fraction of the methanolic extract of the brown alga Sargassum thunbergii by using reversed silica flash chromatography. Two new MGDGs were identified as (2S)-1-O-(5Z,8Z,11Z,14Z,17Z-eicosapentaenoyl)-2-O-(9Z,12Z,15Z-octadecatrienoyl)-3-O-beta-D-galactopyranosyl-sn-glycerol (1) and (2S)-1-O-(9Z,12Z,15Z-octadecatrienoyl)-2-O-(6Z,9Z,12Z,15Z-octadecatetraenoyl)-3-O-beta-D-galactopyranosyl-sn-glycerol (2) by FAB tandem mass spectrometry, NMR techniques, and specific enzyme-catalyzed hydrolysis of the sn-1 fatty acyl linkage. The regiochemical attachment of the acyl chains in the glycerol moiety was established by 2D NMR correlations and confirmed by enzymatic hydrolysis.
Collapse
Affiliation(s)
- Young Hwan Kim
- Proteomics Team, Korea Basic Science Institute, 52 Eoun-Dong Yuseong-Gu, Daejeon, 305-333, South Korea
| | | | | | | | | |
Collapse
|
14
|
Analysis of Fatty Acyl Groups of Diacyl Galactolipid Molecular Species by HPLC/ESI-MS with In-source Fragmentation. B KOREAN CHEM SOC 2003. [DOI: 10.5012/bkcs.2003.24.8.1163] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
15
|
Kim YH, So KY, Limb JK, Jhon GJ, Han SY. Identification of triacylglycerols containing two short-chain fatty acids at sn-2 and sn-3 positions from bovine udder by fast atom bombardment tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2000; 14:2230-2237. [PMID: 11114033 DOI: 10.1002/1097-0231(20001215)14:23<2230::aid-rcm156>3.0.co;2-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Several triacylglycerol (TAG) molecular species, that contain two short-chain fatty acids (C4 to C8) at the sn-2 and sn-3 positions of the glycerol backbone, were isolated from bovine udder by using solvent extraction and silica gel column chromatography. Their structures were identified by fast atom bombardment (FAB) tandem mass spectrometry (MS/MS), based on the information obtained from collision-induced dissociation (CID) spectra of sodium-adducted molecules ([M + Na](+)) of model TAG compounds which had been synthesized from glycerol and appropriate fatty acids. For each species, the relative positions of the three fatty acids on the glycerol backbone, as well as fatty acid composition and double-bond position in the fatty acyl group, were determined. A majority of sodium-adducted molecules observed in the FAB mass spectrum were mixtures of at least two components that have different fatty acid composition but the same molecular mass. In addition, all the components present in mixtures of all the species contain a long-chain fatty acid (C12 to C18) at the sn-1 position, a short-chain fatty acid (C4 to C8) at the sn-2 position, and a butyric acid uniquely at the sn-3 position.
Collapse
Affiliation(s)
- Y H Kim
- Complex Carbohydrate Research Center, University of Georgia, 220 River Bend Road, Athens, GA 30602-4712, USA.
| | | | | | | | | |
Collapse
|