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Mannose binding lectin

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https://www.readbyqxmd.com/read/28937743/rational-design-of-an-anticalin-type-sugar-binding-protein-using-a-genetically-encoded-boronate-side-chain
#1
Selvakumar Edwardraja, Andreas Eichinger, Ina Theobald, Carina Andrea Sommer, Andreas J Reichert, Arne Skerra
The molecular recognition of carbohydrates plays a fundamental role in many biological processes. However, the development of carbohydrate-binding reagents for biomedical research and use poses a challenge due to the generally poor affinity of proteins towards sugars in aqueous solution. Here, we describe the effective molecular recognition of pyranose monosaccharides (in particular, galactose and mannose) by a rationally designed protein receptor based on the human lipocalin scaffold (Anticalin). Complexation relies on reversible covalent cis-diol boronate diester formation with a genetically encoded L-boronophenylalanine (Bpa) residue which was incorporated as a non-natural amino acid at a sterically permissive position in the binding site of the Anticalin, as confirmed by X-ray crystallography...
September 22, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28934853/responsive-photonic-crystal-carbohydrate-hydrogel-sensor-materials-for-selective-and-sensitive-lectin-protein-detection
#2
Zhongyu Cai, Aniruddha Sasmal, Xinyu Liu, Sanford A Asher
Lectin proteins, such as the highly toxic lectin protein, ricin, and the immunochemically important lectin, jacalin, play significant roles in many biological functions. It is highly desirable to develop a simple but efficient method to selectively detect lectin proteins. Here we report the development of carbohydrate containing responsive hydrogel sensing materials for the selective detection of lectin proteins. The copolymerization of a vinyl linked carbohydrate monomer with acrylamide and acrylic acid forms a carbohydrate hydrogel that shows specific "multivalent" binding to lectin proteins...
September 22, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28931061/binding-of-a-c-type-lectin-s-coiled-coil-domain-to-the-domeless-receptor-directly-activates-the-jak-stat-pathway-in-the-shrimp-immune-response-to-bacterial-infection
#3
Jie-Jie Sun, Jiang-Feng Lan, Xiao-Fan Zhao, Gerardo R Vasta, Jin-Xing Wang
C-type lectins (CTLs) are characterized by the presence of a C-type carbohydrate recognition domain (CTLD) that by recognizing microbial glycans, is responsible for their roles as pattern recognition receptors in the immune response to bacterial infection. In addition to the CTLD, however, some CTLs display additional domains that can carry out effector functions, such as the collagenous domain of the mannose-binding lectin. While in vertebrates, the mechanisms involved in these effector functions have been characterized in considerable detail, in invertebrates they remain poorly understood...
September 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28922762/three-myb-genes-co-regulate-the-phloem-based-defence-against-english-grain-aphid-in-wheat
#4
Yan Zhai, Ping Li, Yu Mei, Mingye Chen, Xiaochen Chen, Heng Xu, Xuan Zhou, Hansong Dong, Chunling Zhang, Weihua Jiang
Plant phloem-based defence (PBD) against phloem-feeding insects is characteristic of the sieve occlusion by phloem lectins and β-1,3-glucan callose, both of which are produced under regulation by ethylene and MYB transcription factors. Wheat PBD requires β-1,3-glucan synthase-like proteins GSL2, GSL10, and GSL12, and may also require insect-resistant mannose-binding lectins Hfr-1 and Wci-1, which can accumulate in the phloem upon aphid feeding. This study elucidates whether any of the 73 MYB genes identified previously in the common wheat Triticum aestivum genome plays a role in wheat PBD activation with regard to the GSLs and lectins...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28906588/surface-glycan-pattern-of-canine-equine-and-ovine-bone-marrow-derived-mesenchymal-stem-cells
#5
Salvatore Desantis, Gianluca Accogli, Antonio Crovace, Edda G Francioso, Alberto Maria Crovace
The use of bone marrow-derived mesenchymal stem cells (MSCs) for clinical and experimental studies is increasing, but full characterization of MSCs in veterinary species is hindered by the variability in species-specific cell surface marker expression and antibody cross reactivity. Recent studies demonstrated that the glycans in the glycocalyx of MSCs are promising candidates as cell biomarkers. In the present study, we analyzed the glycocalyx of canine MSCs (cMSCs), ovine MSCs (oMSCs), and equine MSCs (eMSCs) using a cell microarray procedure in which MSCs were spotted on microarray slides and incubated with a panel of 14 biotinylated lectins and Cy3-conjugated streptavidin...
September 14, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28898115/mannose-binding-lectin-deficiency-and-miscarriages-in-rheumatoid-arthritis
#6
Juliana Z Cieslinski, Isabela Goeldner, Thelma L Skare, Renato Nisihara, Fabiana A De Andrade, Thirumalaisamy P Velavan, Iara Messias-Reason, Shirley R R Utiyama
OBJECTIVE: To investigate the association between mannose-binding lectin (MBL) serum level and MBL2 polymorphisms, and the frequency of spontaneous miscarriages in rheumatoid arthritis (RA) patients. METHODS: One hundred seventy seven women (mean age 50 years) with RA from Southern Brazil were studied and 4.5% had a history of abortion (8/177). The MBL levels were determined by ELISA. MBL2 polymorphisms in the promoter (-550H/L, -221X/Y), 5' untranslated region (4 P/Q) and exon 1 (p...
September 12, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28894916/structural-and-functional-diversity-of-collectins-and-ficolins-and-their-relationship-to-disease
#7
REVIEW
Mark Howard, Conrad A Farrar, Steven H Sacks
Pattern recognition molecules are sensors for the innate immune system and trigger a number of pathophysiological functions after interaction with the corresponding ligands on microorganisms or altered mammalian cells. Of those pattern recognition molecules used by the complement system, collagen-like lectins (collectins) are an important subcomponent. Whereas the best known of these collectins, mannose-binding lectin, largely occurs as a circulating protein following production by hepatocytes, the most recently described collectins exhibit strong local biosynthesis...
September 11, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28885759/host-guest-complexes-of-cyclodextrins-and-nanodiamonds-as-strong-non-covalent-binding-motif-for-self-assembled-nanomaterials
#8
Frauke Schibilla, Jens Voskuhl, Natalie Fokina, Jeremy Dahl, Peter R Schreiner, Bart Jan Ravoo
We report on the inclusion of carboxy- and amine-substituted molecular nanodiamonds (NDs) adamantane, diamantane and triamantane by β- and γ-cyclodextrin (β-CD and γ-CD) with particularly suited hydrophobicity and symmetry for an optimal fit of host and guest. We studied the host-guest interactions in detail and generally observed 1:1 association of the NDs with the larger γ-CD cavity but 1:2 association for the largest ND in the series (triamantane) with β-CD. We found higher binding affinities of carboxy-substituted NDs compared to amine-substituted NDs...
September 8, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28879439/mannose-binding-lectin-mbl-deficiency-and-tuberculosis-infection-in-patients-with-ankylosing-spondylitis
#9
Renato Nisihara, Thelma Skare, Vinícius Maestri, Juliana S Alegretti, Ana Paula B Campos, Iara Messias-Reason
Ankylosing spondylitis (AS) patients may have higher prevalence of mannose-binding lectin (MBL) deficiency than normal individuals. MBL deficiency may influence susceptibility to infections. The aim of the study was to verify if MBL deficiency in patients with AS predisposes to infections. We studied 60 patients with AS diagnosed according to the Assessment of SpondyloArthritis international Society (ASAS) criteria. These patients had their MBL serum levels determinated. Twenty-five individuals were identified as MBL deficient (serum values 100 ng/mL)...
September 6, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28876382/detection-purification-and-characterization-of-a-lectin-from-freshwater-green-algae-spirogyra-spp
#10
Antônia S DE Oliveira, Cláudia F Lóssio, Anne J Rangel, Maria G Q Martins, Fernando E P DO Nascimento, Maria L L DE Andrade, Benildo S Cavada, Sírleis R Lacerda, Kyria S DO Nascimento
Freshwater algae are rich sources of structurally biologically active metabolites, such as fatty acids, steroids, carotenoids and polysaccharides. Among these metabolites, lectins stand out. Lectins are proteins or glycoproteins of non-immune origin which bind to carbohydrates or glycoconjugates, without changing ligand structure. Many studies have reported on the use of Spirogyra spp. as effective bioindicators of heavy metals; however, reports on Spirogyra molecular bioprospecting are quite limited. Therefore, this study aimed to detect, isolate, purify and characterize a lectin present in the freshwater green algae Spirogyra...
August 31, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28864337/complement-genomics-and-antibody-mediated-rejection-in-heart-recipients
#11
EDITORIAL
Javier Carbone
In this issue of the Journal of Heart and Lung Transplantation, Marrón-Liñares et al report the results of an interesting study in which they evaluated 51 genes associated with the complement pathway in a small number of heart recipients to explore their relationship with antibody-mediated rejection (AMR). Next-generation sequencing was used in 46 heart transplant recipients (23 with AMR and 23 without AMR). The authors identified a significant association of 2 single-nucleotide polymorphisms with the absence or presence of AMR, respectively, p...
August 19, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28862488/some-lectin-binding-properties-of-the-tongue-of-the-mole-rat-nannospalax-xanthodon
#12
N Kuru, K Cinar, E Demirbag, R Ilgun
We investigated carbohydrate residues on the epithelial surface, in the epithelial cells and in gland cells of the tongue of the mole rat using histochemical methods. We used horseradish peroxidase-conjugated lectins from Helix pomatia (HPA), Arachishypogaea (PNA), Ulexeuropaeus (UEA I), Canavaliaensiformis (Con A). The most intense reactivity was observed in the keratin layer with HPA, UEA I and Con A, and in the epithelial cells with UEA I and Con A. In the glands, we found strong reactivity in serous cells with HPA and Con A, and in mucous cells with HPA and UEA I...
September 1, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28837214/combined-genotypes-of-the-mbl2-gene-related-to-low-mannose-binding-lectin-levels-are-associated-with-vaso-occlusive-events-in-children-with-sickle-cell-anemia
#13
Fernanda Silva Medeiros, Taciana Furtado de Mendonça, Katiuscia Araújo de Miranda Lopes, Laís Medeiros da Câmara França, Andreia Soares da Silva, Luydson Richardson Silva Vasconcelos, Maria do Carmo Valgueiro Costa de Oliveira, Ana Cláudia Mendonça Dos Anjos, Betânia Lucena Domingues Hatzlhofer, Marcos André Cavalcanti Bezerra, Aderson da Silva Araújo, Patrícia Moura, Maria do Socorro de Mendonça Cavalcanti
Sickle cell anemia (SCA) presents heterogenous clinical manifestations that cannot be explained solely by alterations to hemoglobin (Hb); other components such as endothelial adhesion, thrombosis and inflammation may be involved. The mannose-binding lectin (MBL) has an important role in innate immunity and inflammatory diseases. In this report, we describe an association between MBL2 polymorphism related to low production of serum MBL and the frequency of vasoocclusive events (FVOE) in children ≤ 5 years old with SCA (p = 0...
July 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28819174/interleukin-17-receptor-a-il-17ra-as-a-central-regulator-of-the-protective-immune-response-against-giardia
#14
Oonagh Paerewijck, Brecht Maertens, Leentje Dreesen, Frederik Van Meulder, Iris Peelaers, Dariusz Ratman, Robert W Li, Erik Lubberts, Karolien De Bosscher, Peter Geldhof
The protozoan parasite Giardia is a highly prevalent intestinal pathogen with a wide host range. Data obtained in mice, cattle and humans revealed the importance of IL-17A in the development of a protective immune response against Giardia. The aim of this study was to further unravel the protective effector mechanisms triggered by IL-17A following G. muris infection in mice, by an RNA-sequencing approach. C57BL/6 WT and C57BL/6 IL-17RA KO mice were orally infected with G. muris cysts. Three weeks post infection, intestinal tissue samples were collected for RNA-sequencing, with samples from uninfected C57BL/6 WT and C57BL/6 IL-17RA KO animals serving as negative controls...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813016/a-novel-high-mannose-specific-lectin-from-the-green-alga-halimeda-renschii-exhibits-a-potent-anti-influenza-virus-activity-through-high-affinity-binding-to-the-viral-hemagglutinin
#15
Jinmin Mu, Makoto Hirayama, Yuichiro Sato, Kinjiro Morimoto, Kanji Hori
We have isolated a novel lectin, named HRL40 from the green alga Halimeda renschii. In hemagglutination-inhibition test and oligosaccharide-binding experiment with 29 pyridylaminated oligosaccharides, HRL40 exhibited a strict binding specificity for high-mannose N-glycans having an exposed (α1-3) mannose residue in the D2 arm of branched mannosides, and did not have an affinity for monosaccharides and other oligosaccharides examined, including complex N-glycans, an N-glycan core pentasaccharide, and oligosaccharides from glycolipids...
August 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28803976/canavalia-bonariensis-lectin-molecular-bases-of-glycoconjugates-interaction-and-antiglioma-potential
#16
Benildo Sousa Cavada, Mayara Torquato Lima Silva, Vinicius Jose Silva Osterne, Vanir Reis Pinto-Junior, Ana Paula Machado do Nascimento, Ingrid Alessandra Victoria Wolin, Isabella Aparecida Heinrich, Clareane Avelino Simplicio Nobre, Cleane Gomes Moreira, Claudia Figueiredo Lossio, Cintia Renata Costa Rocha, Jorge Luiz Martins, Kyria Santiago Nascimento, Rodrigo Bainy Leal
CaBo is a mannose/glucose-specific lectin purified from seeds of Canavalia bonariensis. In the present work, we report the CaBo crystal structure determined to atomic resolution in the presence of X-man, a specific ligand. Similar to the structural characteristics of other legume lectins, CaBo presented the jellyroll motif, a metal binding site occupied by calcium and manganese ions close to the carbohydrate-recognition domain (CRD). In vitro test of CaBo cytotoxicity against glioma cells demonstrated its ability to decrease the cellular viability and migration by induction of autophagy and cell death...
August 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28794230/analysis-of-factor-d-isoforms-in-malpuech-michels-mingarelli-carnevale-patients-highlights-the-role-of-masp-3-as-a-maturase-in-the-alternative-pathway-of-complement
#17
Rasmus Pihl, Lisbeth Jensen, Annette G Hansen, Ida B Thøgersen, Stephanie Andres, Frederik Dagnæs-Hansen, Konrad Oexle, Jan J Enghild, Steffen Thiel
Factor D (FD), which is also known as adipsin, is regarded as the first-acting protease of the alternative pathway (AP) of complement. It has been suggested that FD is secreted as a mature enzyme that does not require subsequent activation. This view was challenged when it was shown that mice lacking mannose-binding lectin (MBL)-associated serine protease-1 (MASP-1) and MASP-3 contain zymogenic FD (pro-FD), and it is becoming evident that MASP-3 is implicated in pro-FD maturation. However, the necessity of MASP-3 for pro-FD cleavage has been questioned, because AP activity is still observed in sera from MASP-1/3-deficient Malpuech-Michels-Mingarelli-Carnevale (3MC) patients...
August 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28783370/association-between-polymorphisms-of-the-mannose-binding-lectin-and-severity-of-periportal-fibrosis-in-schistosomiasis-in-the-northeast-of-brazil
#18
Taynan da Silva Constantino, Elker Lene Santos de Lima, Lidiane Régia Pereira Braga de Brito, Jamile Luciana Silva, Maria Rosângela Cunha Duarte Coêlho, Maria Tereza Cartaxo Muniz, Paula Carolina Valença Silva, Ana Lúcia Coutinho Domingues
AIMS: Mannose-binding lectin (MBL) is a protein synthesized by the liver and its immune response is associated with the development of liver fibrosis. We hypothesized that the polymorphisms in the Exon 1 region (52, 54, 57) and promoter regions (-550 H/L, -221 X/Y) of the MBL2 gene were associated with the severity of periportal fibrosis (PPF), and that these polymorphisms affect the MBL serum levels. MATERIALS AND METHODS: In this cross-sectional study we genotyped these polymorphisms within the MBL2 gene in 229 Brazilian subjects infected with Schistosoma mansoni, with different patterns of PPF...
September 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28743623/novel-mannose-binding-natterin-like-protein-in-the-skin-mucus-of-atlantic-cod-gadus-morhua
#19
Binoy Rajan, Deepti M Patel, Yoichiro Kitani, Kiron Viswanath, Monica F Brinchmann
This study presents the first report of purification of natterin-like protein (Nlp) in a non-venomous fish. The peptide identities of purified cod Nlp were confirmed through LC-MSMS and matched to a cod expressed sequence tag (EST). A partial cod nlp nucleotide sequence was amplified and sequenced based on this EST. Multiple sequence alignment of cod Nlp showed considerable homology with other teleost Nlps and the presence of an N-terminal jacalin-like lectin domain coupled with a C-terminal toxin domain. nlp expression was higher in skin, head kidney, liver and spleen than in other tissues studied...
July 22, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28739878/deconstructing-the-lectin-pathway-in-the-pathogenesis-of-experimental-inflammatory-arthritis-essential-role-of-the-lectin-ficolin-b-and-mannose-binding-protein-associated-serine-protease-2
#20
Nirmal K Banda, Sumitra Acharya, Robert I Scheinman, Gaurav Mehta, Minoru Takahashi, Yuichi Endo, Wuding Zhou, Conrad A Farrar, Steven H Sacks, Teizo Fujita, Hideharu Sekine, V Michael Holers
Complement plays an important role in the pathogenesis of rheumatoid arthritis. Although the alternative pathway (AP) is known to play a key pathogenic role in models of rheumatoid arthritis, the importance of the lectin pathway (LP) pattern recognition molecules such as ficolin (FCN) A, FCN B, and collectin (CL)-11, as well as the activating enzyme mannose-binding lectin-associated serine protease-2 (MASP-2), are less well understood. We show in this article that FCN A(-/-) and CL-11(-/-) mice are fully susceptible to collagen Ab-induced arthritis (CAIA)...
September 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
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