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Glycobiology

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https://www.readbyqxmd.com/read/29777808/preparation-and-applications-of-glyconanoparticles
#1
Qilin Tang, Gangliang Huang
The glyconanoparticle can be used to construct biological cell models that are similar to the expression of carbohydrates on the surface of cells, and it has become excellent research tools in glycobiology, biopharmaceuticals, and materials science. With the deepening of research, glyconanoparticle has broad application prospects in drug delivery, biomedical imaging, diagnosis and treatment because its preparation is simple, and it has the unique physical, chemical and biological properties. The preparation of glyconanoparticles and their applications were summarized and discussed here...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29774041/report-on-the-current-inventory-of-the-toolbox-for-plant-cell-wall-analysis-proteinaceous-and-small-molecular-probes
#2
REVIEW
Maja G Rydahl, Aleksander R Hansen, Stjepan K Kračun, Jozef Mravec
Plant cell walls are highly complex structures composed of diverse classes of polysaccharides, proteoglycans, and polyphenolics, which have numerous roles throughout the life of a plant. Significant research efforts aim to understand the biology of this cellular organelle and to facilitate cell-wall-based industrial applications. To accomplish this, researchers need to be provided with a variety of sensitive and specific detection methods for separate cell wall components, and their various molecular characteristics in vitro as well as in situ ...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29759530/emerging-glycobiology-tools-a-renaissance-in-accessibility
#3
REVIEW
Douglas M Oswald, Brian A Cobb
The glycobiology of the immune response is a topic that has garnered increased attention due to a number of key discoveries surrounding IgG function, the specificity of some broadly neutralizing anti-HIV antibodies, cancer immunoregulation by galectin molecules and others. This review is the opening article in a Special Edition of Cellular Immunology focused on glycoimmunology, and has the goal of setting the context for these articles by providing a mini-review of how glycans impact immunity. We also focus on some of the technological and methodological advances in the field of glycobiology that are being deployed to lower the barrier of entry into the glycosciences, and to more fully interrogate the glycome and its function...
April 25, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29747820/gangliosides-and-autoimmune-peripheral-nerve-diseases
#4
John A Goodfellow, Hugh J Willison
A wide range of neuroimmunological diseases, referred to as autoimmune neuropathies, affect the peripheral nervous systems (PNS). The PNS is structurally diverse with complex anatomical compartments enriched in many different myelin and neuronal glycolipids, notably gangliosides. Autoimmune neuropathies are a proportion of autoimmune neuropathies mediated by autoimmune attack due to antibodies reactive with these compartmentally localized gangliosides. Antiganglioside antibodies are principally associated with the acute paralytic disease, Guillain-Barré syndrome, and are also found in several chronic autoimmune neuropathy syndromes...
2018: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/29733585/clickable-and-high-sensitivity-metal-containing-tags-for-mass-cytometry
#5
Bedilu Allo, Xudong Lou, Alexandre Bouzekri, Olga I Ornatsky
Mass cytometry is a highly multiplexed single-cell analysis platform that uses metal tagged reagents to identify multiple cellular biomarkers. Current metal-tagged reagent preparation employs thiol-maleimide chemistry to covalently couple maleimide-functionalized metal-chelating polymers (MCPs) with antibodies (Abs), a process that requires partial reduction of the Ab to form reactive thiol groups. However, some classes of Abs (for example, IgM) as well as biomolecules lacking cysteine residues has been challenging to label using this method...
May 7, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29677181/exploiting-glycan-topography-for-computational-design-of-env-glycoprotein-antigenicity
#6
Wen-Han Yu, Peng Zhao, Monia Draghi, Claudia Arevalo, Christina B Karsten, Todd J Suscovich, Bronwyn Gunn, Hendrik Streeck, Abraham L Brass, Michael Tiemeyer, Michael Seaman, John R Mascola, Lance Wells, Douglas A Lauffenburger, Galit Alter
Mounting evidence suggests that glycans, rather than merely serving as a "shield", contribute critically to antigenicity of the HIV envelope (Env) glycoprotein, representing critical antigenic determinants for many broadly neutralizing antibodies (bNAbs). While many studies have focused on defining the role of individual glycans or groups of proximal glycans in bNAb binding, little is known about the effects of changes in the overall glycan landscape in modulating antibody access and Env antigenicity...
April 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29675741/collision-cross-sections-and-ion-mobility-separation-of-fragment-ions-from-complex-n-glycans
#7
David J Harvey, Yasunori Watanabe, Joel D Allen, Pauline Rudd, Kevin Pagel, Max Crispin, Weston B Struwe
Ion mobility mass spectrometry (IM-MS) holds great potential for structural glycobiology, in particular in its ability to resolve glycan isomers. Generally, IM-MS has largely been applied to intact glycoconjugate ions with reports focusing on the separation of different adduct types. Here, we explore IM separation and report the collision cross section (CCS) of complex type N-glycans and their fragments in negative ion mode following collision-induced dissociation (CID). CCSs of isomeric fragment ions were found, in some cases, to reveal structural details that were not present in CID spectra themselves...
April 19, 2018: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29531238/loss-and-gain-of-n-linked-glycosylation-sequons-due-to-single-nucleotide-variation-in-cancer
#8
Yu Fan, Yu Hu, Cheng Yan, Radoslav Goldman, Yang Pan, Raja Mazumder, Hayley M Dingerdissen
Despite availability of sequence site-specific information resulting from years of sequencing and sequence feature curation, there have been few efforts to integrate and annotate this information. In this study, we update the number of human N-linked glycosylation sequons (NLGs), and we investigate cancer-relatedness of glycosylation-impacting somatic nonsynonymous single-nucleotide variation (nsSNV) by mapping human NLGs to cancer variation data and reporting the expected loss or gain of glycosylation sequon...
March 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29523771/glycobiology-of-syndecan-1-in-bacterial-infections
#9
REVIEW
Rafael S Aquino, Yvonne Hui-Fang Teng, Pyong Woo Park
Syndecan-1 (Sdc1) is a major cell surface heparan sulfate (HS) proteoglycan of epithelial cells, a cell type targeted by many bacterial pathogens early in their pathogenesis. Loss of Sdc1 in mice is a gain-of-function mutation that significantly decreases the susceptibility to several bacterial infections, suggesting that subversion of Sdc1 is an important virulence strategy. HS glycosaminoglycan (GAG) chains of cell surface Sdc1 promote bacterial pathogenesis by facilitating the attachment of bacteria to host cells...
April 17, 2018: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29521143/human-disease-glycomics-technology-advances-enabling-protein-glycosylation-analysis-part-2
#10
Arun V Everest-Dass, Edward S X Moh, Christopher Ashwood, Abdulrahman M M Shathili, Nicolle H Packer
The changes in glycan structures have been attributed to disease states for several decades. The surface glycosylation pattern is a signature of physiological state of a cell. In this review we provide a link between observed substructural glycan changes and a range of diseases. Areas covered: We highlight biologically relevant glycan substructure expression in cancer, inflammation, neuronal diseases and diabetes. Furthermore, the alterations in antibody glycosylation in a disease context are described. Expert commentary: Advances in technologies, as described in Part 1 of this review have now enabled the characterization of specific glycan structural markers of a range of disease states...
April 2018: Expert Review of Proteomics
https://www.readbyqxmd.com/read/29495275/the-interactions-between-host-glycobiology-bacterial-microbiota-and-viruses-in-the-gut
#11
REVIEW
Vicente Monedero, Javier Buesa, Jesús Rodríguez-Díaz
Rotavirus (RV) and norovirus (NoV) are the major etiological agents of viral acute gastroenteritis worldwide. Host genetic factors, the histo-blood group antigens (HBGA), are associated with RV and NoV susceptibility and recent findings additionally point to HBGA as a factor modulating the intestinal microbial composition. In vitro and in vivo experiments in animal models established that the microbiota enhances RV and NoV infection, uncovering a triangular interplay between RV and NoV, host glycobiology, and the intestinal microbiota that ultimately influences viral infectivity...
February 24, 2018: Viruses
https://www.readbyqxmd.com/read/29470639/arabinogalactan-proteins-and-their-sugar-chains-functions-in-plant-reproduction-research-methods-and-biosynthesis
#12
REVIEW
Shihao Su, Tetsuya Higashiyama
The arabinogalactan protein (AGP) family is one of the most complex protein families and is ubiquitous in the plant kingdom. Moreover, it has been demonstrated to play various roles during plant reproduction. A typical AGP contains a hydroxyproline-rich core protein with high heterogeneity and varying numbers of polysaccharide side chains. However, the functions of the polysaccharide components (i.e. AG sugar chains) remain largely unknown due to the general difficulties associated with studying sugar chains in glycobiology...
March 2018: Plant Reproduction
https://www.readbyqxmd.com/read/29469568/venturing-beyond-donor-controlled-glycosylation-new-perspectives-toward-anomeric-selectivity
#13
Wei-Lin Leng, Hui Yao, Jing-Xi He, Xue-Wei Liu
Glycans are complex compounds consisting of sugars linked glycosidically, existing either as pure polysaccharides or as part of glycoconjugates. They are prevalent in nature and possess important functions in regulating biological pathways. However, their diversity coupled with physiochemical similarities makes it challenging to isolate them in large quantities for biochemical studies, hence hampering progress in glycobiology and glycomedicine. Glycochemistry presents an alternative strategy to obtain pure glycan compounds through artificial synthetic methods...
March 20, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29393868/galectin-3-the-impact-on-the-clinical-management-of-patients-with-thyroid-nodules-and-future-perspectives
#14
REVIEW
Armando Bartolazzi, Salvatore Sciacchitano, Calogero D'Alessandria
Galectins (S-type lectins) are an evolutionarily-conserved family of lectin molecules, which can be expressed intracellularly and in the extracellular matrix, as well. Galectins bind β-galactose-containing glycoconjugates and are functionally active in converting glycan-related information into cell biological programs. Altered glycosylation notably occurring in cancer cells and expression of specific galectins provide, indeed, a fashionable mechanism of molecular interactions able to regulate several tumor relevant functions, among which are cell adhesion and migration, cell differentiation, gene transcription and RNA splicing, cell cycle and apoptosis...
February 2, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29346417/xylose-donor-transport-is-critical-for-fungal-virulence
#15
Lucy X Li, Carsten Rautengarten, Joshua L Heazlewood, Tamara L Doering
Cryptococcus neoformans, an AIDS-defining opportunistic pathogen, is the leading cause of fungal meningitis worldwide and is responsible for hundreds of thousands of deaths annually. Cryptococcal glycans are required for fungal survival in the host and for pathogenesis. Most glycans are made in the secretory pathway, although the activated precursors for their synthesis, nucleotide sugars, are made primarily in the cytosol. Nucleotide sugar transporters are membrane proteins that solve this topological problem, by exchanging nucleotide sugars for the corresponding nucleoside phosphates...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29343819/effects-of-silver-nanocolloids-on-plant-complex-type-n-glycans-in-oryza-sativa-roots
#16
Risa Horiuchi, Yukari Nakajima, Shosaku Kashiwada, Nobumitsu Miyanishi
Silver nanomaterials have been mainly developed as antibacterial healthcare products worldwide, because of their antibacterial activity. However, there is little data regarding the potential risks and effects of large amounts of silver nanomaterials on plants. In contrast, N-glycans play important roles in various biological phenomena, and their structures and expressions are sensitive to ambient environmental changes. Therefore, to assesse the effects of silver nanomaterials, we focused on the correlation between N-glycans and the effects of silver nanomaterials in plants and analyzed N-glycan structures in Oryza sativa seedlings exposed to silver nanocolloids (SNCs)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317507/identification-of-euglena-gracilis-%C3%AE-1-3-glucan-phosphorylase-and-establishment-of-a-new-glycoside-hydrolase-gh-family-gh149
#17
Sakonwan Kuhaudomlarp, Nicola J Patron, Bernard Henrissat, Martin Rejzek, Gerhard Saalbach, Robert A Field
Glycoside phosphorylases (EC 2.4.x.x) carry out the reversible phosphorolysis of glucan polymers, producing the corresponding sugar 1-phosphate and a shortened glycan chain. β-1,3-Glucan phosphorylase activities have been reported in the photosynthetic euglenozoan Euglena gracilis , but the cognate protein sequences have not been identified to date. Continuing our efforts to understand the glycobiology of E. gracilis , we identified a candidate phosphorylase sequence, designated EgP1, by proteomic analysis of an enriched cellular protein lysate...
February 23, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29306434/focused-glycomic-profiling-with-an-integrated-microfluidic-lectin-barcode-system
#18
Yuqin Shang, Yong Zeng
Protein glycosylation is one of the key processes that play essential roles in biological functions and dysfunctions. However, progress in glycomics has considerably lagged behind genomics and proteomics, due in part to the enormous challenges associated with the analysis of glycans. Here we present a new integrated and automated microfluidic lectin barcode platform to substantially improve the performance of lectin array for focused glycomic profiling. The chip design and flow control were optimized to promote the lectin-glycan binding kinetics and the speed of lectin microarrays...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29251719/expression-system-for-structural-and-functional-studies-of-human-glycosylation-enzymes
#19
Kelley W Moremen, Annapoorani Ramiah, Melissa Stuart, Jason Steel, Lu Meng, Farhad Forouhar, Heather A Moniz, Gagandeep Gahlay, Zhongwei Gao, Digantkumar Chapla, Shuo Wang, Jeong-Yeh Yang, Pradeep Kumar Prabhakar, Roy Johnson, Mitche Dela Rosa, Christoph Geisler, Alison V Nairn, Jayaraman Seetharaman, Sheng-Cheng Wu, Liang Tong, Harry J Gilbert, Joshua LaBaer, Donald L Jarvis
Vertebrate glycoproteins and glycolipids are synthesized in complex biosynthetic pathways localized predominantly within membrane compartments of the secretory pathway. The enzymes that catalyze these reactions are exquisitely specific, yet few have been extensively characterized because of challenges associated with their recombinant expression as functional products. We used a modular approach to create an expression vector library encoding all known human glycosyltransferases, glycoside hydrolases, and sulfotransferases, as well as other glycan-modifying enzymes...
February 2018: Nature Chemical Biology
https://www.readbyqxmd.com/read/29207682/over-forty-years-of-bladder-cancer-glycobiology-where-do-glycans-stand-facing-precision-oncology
#20
REVIEW
Rita Azevedo, Andreia Peixoto, Cristiana Gaiteiro, Elisabete Fernandes, Manuel Neves, Luís Lima, Lúcio Lara Santos, José Alexandre Ferreira
The high molecular heterogeneity of bladder tumours is responsible for significant variations in disease course, as well as elevated recurrence and progression rates, thereby hampering the introduction of more effective targeted therapeutics. The implementation of precision oncology settings supported by robust molecular models for individualization of patient management is warranted. This effort requires a comprehensive integration of large sets of panomics data that is yet to be fully achieved. Contributing to this goal, over 40 years of bladder cancer glycobiology have disclosed a plethora of cancer-specific glycans and glycoconjugates (glycoproteins, glycolipids, proteoglycans) accompanying disease progressions and dissemination...
October 31, 2017: Oncotarget
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