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Danielle R Balay, Michael G Gänzle, Lynn M McMullen
The aim of this study was to determine if different carbohydrates influence the growth of Listeria monocytogenes in the presence of carnocyclin A or leucocin A. Carnobacterium maltaromaticum ATCC PTA-5313 and Leuconostoc gelidum UAL187 were used to produce carnocyclin A and leucocin A, respectively. Growth curves were modeled for five strains of L. monocytogenes grown in basal medium supplemented with glucose, sucrose, fructose, mannose, or cellobiose, in the presence of carnocyclin A or leucocin A. The growth of L...
2018: Frontiers in Microbiology
Yun Tang, Zhen-Yuan Zhu, Li-Chao Pan, Huiqing Sun, Qiao-Ying Song, Yongmin Zhang
A polysaccharide was obtained from Lepidium meyenii Walp by hot water extraction and purification by Millipore (100 kD) and Sephadex G-200. The content of polysaccharide was examined to be 89.9% with phenol-sulfuric acid method. Its average molecular weight was estimated to be 2.213 × 106  Da by High Performance Gel Permeation Chromatography (HPGPC). Monosaccharide analysis showed that the polysaccharide was composed of arabinose, mannose, glucose and galactose with the molar ratio of 2.134: 1: 2.78: 2...
March 16, 2018: Natural Product Research
Hathairat Rachniyom, Atsuko Matsumoto, Yuki Inahashi, Akira Take, Yoko Takahashi, Arinthip Thamchaipenet
A novel actinomycete strain, designated GKU 128T , isolated from the roots of an Indian oak tree [Barringtonia acutangula (L.) Gaertn.] at Khao Khitchakut district, Chantaburi province, Thailand, was characterized by using a polyphasic approach. The strain formed a branched substrate and aerial mycelia which differentiated into straight to flexuous chains of smooth-ornamented spores. Analysis of the cell wall revealed the presence of meso-diaminopimelic acid and N-acetylmuramic acid in the peptidoglycan. The whole-cell sugars were glucose, madurose, mannose, rhamnose and ribose...
March 15, 2018: International Journal of Systematic and Evolutionary Microbiology
Chunhua Wang, Dongmei Lin, Quan Chen, Shuqian Lin, Songsheng Shi, Chunmei Chen
The Ganoderma lucidum ( G. lucidum ) mushroom is one of the most extensively studied functional foods, known for its numerous health benefits, including the inhibition of tumor cell growth. The present study assessed the anti-proliferative and pro-apoptotic activity of a novel G. lucidum polysaccharide peptide (GL-PP) in human glioma U251 cells, which was purified from grass-cultured G. lucidum . GL-PP is a glycopeptide with an average molecular weight of 42,635 Da and a polysaccharide-to-peptide ratio of 88...
April 2018: Oncology Letters
Ryosuke Koyama, Wataru Hakamata, Takako Hirano, Toshiyuki Nishio
Three Golgi mannosidases (GMs), namely Golgi α-mannosidases IA, IB, and IC, remove mannose residues from N-glycans and regulate the quality control and transportation of nascent proteins. GM inhibitors regulate several biological events such as cell-cell communication, differentiation, and apoptosis in cancer cells. As a result, GM inhibitor-based therapies have gained significant attention for cancer treatment. However, to date, no GM inhibitor has been approved and none is in clinical development for anti-cancer treatment...
March 13, 2018: Chemical & Pharmaceutical Bulletin
Palika Abayakoon, James P Lingford, Yi Jin, Christopher Bengt, Gideon J Davies, Shenggen Yao, Ethan D Goddard-Borger, Spencer J Williams
Bacterial sulfoglycolytic pathways catabolise sulfoquinovose (SQ), or glycosides thereof, to generate a three-carbon metabolite for primary cellular metabolism and a three-carbon sulfonate that is expelled from the cell. Sulfoglycolytic operons encoding an Embden-Meyerhof-Parnas (EMP)-like or Entner-Doudoroff (ED)-like pathway harbour an uncharacterized gene ( yihR in Escherichia coli ; PpSQ1_00415 in Pseudomonas putida ) that is upregulated in the presence of SQ and has been annotated as an aldose-1-epimerase and which may encode an SQ mutarotase...
March 13, 2018: Biochemical Journal
Katarzyna Szewczyk, Esther Marie Heise, Jakub P Piwowarski
Preliminary characterization and bioactivity of water-soluble polysaccharides from four Impatiens species- I. glandulifera Royle, I. parviflora DC., I. balsamina L., and I. noli-tangere L.-were investigated. The yields of polysaccharides range widely from 1.97% for I. parviflora roots to 18.63% for I. balsamina aerial parts. SEC (Size exclusion chromatography) chromatograms show that all samples contained a low molecular weight part that consisted of components of similar molecular weight. The aerial parts and roots of I...
March 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Asma Deeb, Abdulla Al Amoodi
We report a 4 years girl with congenital disorders of glycosylation (CDG) type Ib due to a novel homozygous mutation in MPI gene. She presented with diazoxide-responsive hyperinsulinemic hypoglycemia. CDG should be considered in unexplained hypoglycemia particularly in consanguineous families. Diagnosis enables monitoring/prevention of disease comorbidities and early effective treatment.
March 2018: Clinical Case Reports
Cheng Tian, Meimei Wang, Shanshan Liu, Hang Ma, Kai He, Deqi Zhou, Yanlin Li, Xiaoli Ye, Xuegang Li
A new small molecule glycoprotein SPG-8700 with potential anti-colorectal cancer activity was firstly separated by tracking of bioactivity from a new sweet potato variety Zhongshu-1. Matrix-assisted laser desorption ionization mass spectrometry, high-performance liquid chromatography and amino acid analyzer were applied separately to determine the molecular weight and compositions of this glycoprotein. Flow cytometry analysis and western blotting analysis were employed to explore it's mechanism of the anti-colorectal cancer...
March 12, 2018: Natural Product Research
Jin Won Huh, Kyuyoung Song, Hwa Jung Kim, Jung Sun Yum, Sang Bum Hong, Chae Man Lim, Younsuck Koh
BACKGROUND: Mannose-binding lectin (MBL) deficiency leads to increased susceptibility to infection. We investigated whether serial changes in MBL levels are associated with the prognosis of patients diagnosed with septic shock, and correlated with cytokine levels. METHODS: We enrolled 131 patients with septic shock in the study. We analyzed the serum samples for MBL and cytokine levels at baseline and 7 days later. Samples on day 7 were available in 73 patients...
March 7, 2018: Tuberculosis and Respiratory Diseases
Juan M Martínez, Carlota Delso, Diederich Aguilar, Guillermo Cebrián, Ignacio Álvarez, Javier Raso
The influence of temperature (7-43 °C), pH (3.5-7.0) and ethanol concentration (6-25%) on PEFinduced autolysis and the release of mannose from Saccharomyces cerevisiae was investigated. Changes in the release of intracellular compounds absorbing at 260 nm and 280 nm depended on storage conditions and differed among untreated and PEF-treated cells. For untreated cells, the increase of the Abs260 and Abs280 values during 3 weeks of storage was very low when incubated in media of different pH, different ethanol concentrations, or at 7° and 25 °C...
August 2018: Food Microbiology
Bianca Braz Mattos, Caroline Montebianco, Elisson Romanel, Tatiane da Franca Silva, Renato Barroso Bernabé, Fernanda Simas-Tosin, Lauro M Souza, Guilherme L Sassaki, Maite F S Vaslin, Eliana Barreto-Bergter
Cladosporium herbarum is a plant pathogen associated with passion fruit scab and mild diseases in pea and soybean. In this study, a peptidogalactomannan (pGM) of C. herbarum mycelium was isolated and structurally characterized, and its role in plant-fungus interactions was evaluated. C. herbarum pGM is composed of carbohydrates (76%) and contains mannose, galactose and glucose as its main monosaccharides (molar ratio, 52:36:12). Methylation and13 C-nuclear magnetic resonance (13 C-NMR) spectroscopy analysis have shown the presence of a main chain containing (1 → 6)-linked α-D-Manp residues, and β-D-Galf residues are present as (1 → 5)-interlinked side chains...
March 2, 2018: Plant Physiology and Biochemistry: PPB
Chenzhipeng Nie, Peilei Zhu, Shuping Ma, Mingchun Wang, Youdong Hu
Stem lettuce has a long history of cultivation in China and possesses high nutritional and medicinal value. In our previous studies, extraction optimization, characterization, and bioactivities of stem lettuce polysaccharides (SLP) were investigated. In this study, SLP were further separated into two purified polysaccharides, SLP-1 and SLP-2, by anion exchange chromatography followed by size exclusion chromatography. SLP-1, with a molecular weight of 90 KDa, was mainly composed of galacturonic acid, galactose and arabinose in a molar ratio of 17...
May 15, 2018: Carbohydrate Polymers
Rui Zhai, Jinguang Hu, Jack N Saddler
In this study, the influence of major hemicellulosic sugars (mannose and xylose) on cellulose hydrolysis and major enzyme activities were evaluated by using both commercial enzyme cocktail and purified cellulase monocomponents over a "library" of cellulosic substrates. Surprisingly, the results showed that unlike glucose, mannose/xylose did not inhibit individual cellulase activities but significantly decreased their hydrolytic performance on cellulose substrates. When various enzyme-substrate interactions (e...
December 6, 2017: Bioresource Technology
Jesus Salinas-Casado, Santiago Méndez-Rubio, Manuel Esteban-Fuertes, Antonio Gómez-Rodríguez, Miguel Vírseda-Chamorro, Marcos Luján-Galán, Grupo Rituman
OBJECTIVE: To compare the efficacy and safety of dietary supplement "Manosar®" composed of D-mannose (2 g), 24 h prolonged release, associated with Proanthocyanidin (PAC) (140 mg), ursolic acid (7.98 mg), A, C, and D vitamins and the oligoelement zinc, versus 240 mg of PAC in recurrent urinary tract infections (UTI), for a designed follow-up of 24 weeks, in women. METHODS: A multicenter randomized experimental double-blind study was carried out. The study was approved by review board of "Complejo Hospitalario de Toledo" (Spain), and all patients gave informed consent...
March 2018: Archivos Españoles de Urología
Mas Sahidayana Mokhtar, Wan Safwani Wan Kamarul Zaman, Thamil Selvee Ramasamy
BACKGROUND: Konjac glucomannan (KGM) is a water-soluble dietary fibre extracted from Amorphophallus konjac K. Koch (Araceae). Konjac fibre has been clinically proven as an effective antioxidant agent in weight control but its traditionally known tumour suppression property remains to be explored. OBJECTIVE: The main objective of this study is to determine the potential anti-proliferative effect of KGM on cancer and normal human liver cell lines, HepG2 and WRL68, respectively...
March 7, 2018: Anti-cancer Agents in Medicinal Chemistry
Dharitri Borah, Sangeetha Nainamalai, Subramanian Gopalakrishnan, Jayashree Rout, Naiyf S Alharbi, Sulaiman Ali Alharbi, Thajuddin Nooruddin
Exopolysaccaharides (EPS) are carbohydrate polymers secreted by microbial cells, as a protective layer termed sheath or capsule. Their composition is variable. Optimisation of nutrient factors and the effect of some simple stresses on the ability of Cyanothece epiphytica to produce EPS were tested. Of the tested stresses, exposure to ozone for 50 s at 0.06 mg/L resulted in a relatively high EPS yield, without any damage to cell structure. EPS was characterised physicochemically. Chemically, it was found to be composed of pentoses arabinose and xylose; hexoses glucose, galactose and mannose; and the deoxyhexose fucose sugars which were sulphated and with different functional groups...
March 8, 2018: Applied Microbiology and Biotechnology
Antony J Fairbanks
N -Glycan oxazolines have found widespread use as activated donor substrates for endo-β- N -acetylglucosaminidase (ENGase) enzymes, an important application that has correspondingly stimulated interest in their production, both by total synthesis and by semi-synthesis using oligosaccharides isolated from natural sources. Amongst the many synthetic approaches reported, the majority rely on the fabrication (either by total synthesis, or semi-synthesis from locust bean gum) of a key Manβ(1-4)GlcNAc disaccharide, which can then be elaborated at the 3- and 6-positions of the mannose unit using standard glycosylation chemistry...
2018: Beilstein Journal of Organic Chemistry
Yu Liu, Peng Zhang, Weilin Wang, Miren Dong, Min Wang, Changhao Gong, Zhihao Jia, Zhaoqun Liu, Anguo Zhang, Lingling Wang, Linsheng Song
DM9 is a novel protein domain with unknown function originally discovered in Drosophila melanogaster. Recently, a protein harboring DM9 repeats was identified as mannose-specific lectin (CgCGL1, renamed as CgDM9CP-1) from the Pacific oyster Crassostrea gigas. In the present study, another DM9 containing protein was identified from oyster C. gigas (designated as CgDM9CP-2). The open reading frame of CgDM9CP-2 gene was of 432 bp, encoding a polypeptide of 143 amino acids with two tandem DM9 repeats. The deduced amino acid sequence of CgDM9CP-2 shared 60...
March 5, 2018: Developmental and Comparative Immunology
Watsana Penkhrue, Kanaporn Sujarit, Takuji Kudo, Moriya Ohkuma, Kazuo Masaki, Tomoyasu Aizawa, Wasu Pathom-Aree, Chartchai Khanongnuch, Saisamorn Lumyong
A novel bioplastic-degrading actinomycete, strain SCM_MK2-4T , was isolated from paddy soil in Thailand. The 16S rRNA gene sequence showed that strain SCM_MK2-4T belonged to the genus Amycolatopsis, with the highest sequence similarity to Amycolatopsisazurea JCM 3275T (99.4 %), and was phylogenetically clustered with this strain along with Amycolatopsislurida JCM 3141T (99.3 %), A. japonica DSM 44213T (99.2 %), A. decaplanina DSM 44594T (99.0 %), A. roodepoortensis M29T (98.9 %), A. keratiniphilasubsp...
March 8, 2018: International Journal of Systematic and Evolutionary Microbiology
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