maackia amurensis lectin ii  (Vector Laboratories)

Journal: bioRxiv

Article Title: Sialic acids are a barrier to the entry of non-influenza orthomyxoviruses

doi: 10.64898/2026.01.15.699645

Figure Lengend Snippet: A . Correlations between RNA-seq data for sialyltransferases and infectivity of VSV pseudotypes harbouring WBV, SINUV or OZV GPs, as well as PR8 influenza. Gene expression data were quantified as fragments per kilobase per million (FPKM) and infection rate as the percentage of infected cells. Both metrics were scaled between 0 and 100, transformed as log 2 (x+1), and their Pearson correlation was calculated. Genes for which at least one virus showed a significant ( P < 0.01) correlation are shown. The heatmap depicts the average Pearson correlation from two independent infection assays, as shown in the scale bar. The numbers inside the heatmap represent the levels of significance (1: P < 0.01, 2: P < 0.001, 3: P < 0.0001). VSV pseudotyped with its own glycoprotein was included as a control. B . Examples of scatter plots between infectivity and RNA-seq data for the ST6GALNAC2 and ST3GAL5 genes. Pearson correlation coefficients (r) and their statistical significance ( P ) are shown (ns: not significant). The data points for the SK-MEL-28 cell line are marked in red, and those for IGROV-1 cell line are marked in blue. C . SK-MEL-28 and IGROV-1 cells were incubated with biotin-labelled MAL II and SNA lectins to quantify by flow cytometry α2,3- and α2,6-linked SAs, respectively. Lectin-treated cells were incubated with Streptavidin-Dylight488TM (strep-dye) and the signal emitted by the dye was used to quantify SAs. Left: fluorescence data from two independent experiments. Cells treated without lectin and incubated with the strep-dye (strep-dye only) were used as negative control. A t-test between SK-MEL-28 and IGROV-1 values was carried out using log-transformed data (**: P < 0.01; ***: P < 0.001; ns: P > 0.05). Right: fluorescence level histogram from one representative experiment is shown. Y-axis shows the relative cell count (%) of α2,3- or α2,6-linked SAs-positive cells, and X-axis shows the intensity of fluorescence.

Article Snippet: Biotinylated lectins MAL II ( Maackia Amurensis Lectin II , L-1260-2, Vector labs) and SNA ( Sambucus Nigra Lectin , B-1305-2, Vector labs) that specifically bind to α2,3- and α2,6-SAs, respectively, were added at 4°C for 30 min at a concentration of 20 μg/mL in FACS buffer.

Techniques: RNA Sequencing, Infection, Gene Expression, Transformation Assay, Virus, Control, Incubation, Flow Cytometry, Fluorescence, Negative Control, Cell Characterization

Journal: bioRxiv

Article Title: Sialic acids are a barrier to the entry of non-influenza orthomyxoviruses

doi: 10.64898/2026.01.15.699645

Figure Lengend Snippet: Effect of MALII (α2,3-SA specific) and SNA (α2,6-SA specific) lectins on the infectivity of VSV pseudotypes harbouring WBV, SINUV or OZV GPs, as well as PR8 influenza. VSV pseudotyped with its own glycoprotein was included as a control. Viral entry was measured as the percentage of GFP-positive cells at 18-24 hpi. Three independent assays were carried out for each lectin dose. Right: representative images showing the effects of the combined MALII and SNA treatment at a dose of 100 μg/mL each (scale bar, 1000 µm). Statistical tests comparing the infectivity data at 0 versus 100 μg/mL are provided in the text.

Article Snippet: Biotinylated lectins MAL II ( Maackia Amurensis Lectin II , L-1260-2, Vector labs) and SNA ( Sambucus Nigra Lectin , B-1305-2, Vector labs) that specifically bind to α2,3- and α2,6-SAs, respectively, were added at 4°C for 30 min at a concentration of 20 μg/mL in FACS buffer.

Techniques: Infection, Control

Journal: The Journal of Biological Chemistry

Article Title: Maackia amurensis seed lectin structure and sequence comparison with other M. amurensis lectins

doi: 10.1016/j.jbc.2025.108466

Figure Lengend Snippet: Amino acid sequence of dimerizing and nondimerizing Maackia amurensis lectins. Alignment of MASL (Sentrimed Maackia amurensis seed lectin) and MAL2 (Vector Labs L-1260-2 based on Yin et al. ) with MAA (EY Laboratories L-7801-1 based on Yamamoto et al. ) with sequences identified by LC-MS/MS in bold font . Signal peptides are italicized , and a cysteine or serine found near the carboxy tail of dimerizing and nondimerizing lectins, respectively, is indicated by a hashtag . A tyrosine at amino acid 250 in MASL and MAA, substituted with alanine in MAL2 is indicated by an exclamation mark . Glycosylation sites identified in MASL are indicated by an italicized dollar sign . Conserved residues, substitutions, and deletions are indicated by asterisks , periods , and dashes , respectively, with amino acids numbered as indicated.

Article Snippet: Alignment of MASL (Sentrimed Maackia amurensis seed lectin) and MAL2 (Vector Labs L-1260-2 based on Yin et al. ( )) with MAA (EY Laboratories L-7801-1 based on Yamamoto et al. ( )) with sequences identified by LC-MS/MS in bold font .

Techniques: Sequencing, Plasmid Preparation, Liquid Chromatography with Mass Spectroscopy, Glycoproteomics

Journal: The Journal of Biological Chemistry

Article Title: Maackia amurensis seed lectin structure and sequence comparison with other M. amurensis lectins

doi: 10.1016/j.jbc.2025.108466

Figure Lengend Snippet: Maackia amurensis lectins resolved by SDS-PAGE. A , MAA, MASL, and MAL2 (15 ug per lane) were resolved by nonreducing and reducing 12% SDS-PAGE and visualized by Coomassie staining along with molecular weight markers as indicated. B , MAA, MASL, and MAL2 (1 ug per lane) were resolved by 12% SDS-PAGE with migration of molecular weight markers as indicated. Lectins were detected by Western blotting with two independent rabbit antibodies as indicated. C , membranes were stained with India ink after Western blotting. MASL, Maackia amurensis seed lectin.

Article Snippet: Alignment of MASL (Sentrimed Maackia amurensis seed lectin) and MAL2 (Vector Labs L-1260-2 based on Yin et al. ( )) with MAA (EY Laboratories L-7801-1 based on Yamamoto et al. ( )) with sequences identified by LC-MS/MS in bold font .

Techniques: SDS Page, Staining, Molecular Weight, Migration, Western Blot

Journal: The Journal of Biological Chemistry

Article Title: Maackia amurensis seed lectin structure and sequence comparison with other M. amurensis lectins

doi: 10.1016/j.jbc.2025.108466

Figure Lengend Snippet: Comparison of MASL, MAA, and MAL2 binding to glycans. Lectins were hybridized to glycan arrays to compare target binding affinities. Signal intensities were normalized to positive controls with background subtracted and are shown as mean + SEM (n = 3). Twenty glycans with the highest affinity for MASL are shown. MASL, Maackia amurensis seed lectin.

Article Snippet: Alignment of MASL (Sentrimed Maackia amurensis seed lectin) and MAL2 (Vector Labs L-1260-2 based on Yin et al. ( )) with MAA (EY Laboratories L-7801-1 based on Yamamoto et al. ( )) with sequences identified by LC-MS/MS in bold font .

Techniques: Comparison, Binding Assay, Glycoproteomics