Molecular Mechanisms of Glycosylation-Mediated Regulation of Cell Surface Signaling
Molecular Mechanisms of Glycosylation-Mediated Regulation of Cell Surface Signaling
Glycosylation is one of the most important post-translational regulatory layers of cell surface molecules. Its role is not limited to increasing the structural complexity of proteins or lipids, but rather lies in continuously reshaping the initiation threshold, transmission efficiency, and termination mode of cell surface signaling by altering molecular folding stability, the conformation of extracellular domains, membrane surface crowding, the probability of lectin recognition, and receptor endocytic fate. In development and differentiation, immune recognition, inflammatory responses, tissue homeostasis, and tumor progression, glycosylation essentially constitutes a “second information layer” positioned above receptor protein sequences.
Keywords: glycosylation; glycan modification; cell surface signaling; N-glycosylation; O-glycosylation; glycolipids; glycocalyx; lectins; receptor clustering; signal transduction
I. Why Glycosylation Has Become an Important Regulatory Layer of Cell Surface Signaling
1.1 Glycans are not accessory decorations, but integral components of signaling systems
(1) Glycans directly participate in the formation of molecular recognition interfaces
Most cell surface receptors, adhesion molecules, and transport proteins exist in glycoprotein form. Glycans are not merely attached to the outer side of the protein scaffold, but instead constitute an actual part of the extracellular recognition interface. Their length, degree of branching, terminal residue composition, and local charge distribution can all alter ligand approach trajectories and binding stability.
(2) Glycans remodel the conformation of receptor extracellular domains
For the same receptor, the flexibility, compactness of folding, and spatial orientation of the extracellular region may all change when glycans are intact, shortened, or lack specific terminal modifications. Such conformational differences further affect receptor dimerization, clustering, and ligand-induced activation efficiency.
(3) Glycans shape the physicochemical environment of the cell surface
The glycocalyx on the cell surface is composed of glycoproteins, glycolipids, and proteoglycans and exhibits pronounced hydration-layer, negative-charge, and steric-barrier properties. This structural layer can alter receptor diffusion rates, the probability of molecular collision, and local adhesion strength, thereby influencing the conditions required for signal initiation.
1.2 Glycosylation exerts multilevel effects on signaling regulation
(1) At the molecular level, it affects ligand recognition
Through steric effects, alterations in hydrogen-bonding networks, and rearrangement of local charge, glycans can strengthen or weaken the specific interaction between ligands and receptors.
(2) At the membrane level, it affects receptor organization
Glycosylation can alter the tendency of receptors to form nanoclusters on the plasma membrane, their association with lipid rafts, and their lateral mobility, thereby influencing the assembly efficiency of signaling platforms.
(3) At the cellular level, it affects phenotypic output
The final consequences of glycosylation can be manifested as changes in cellular activation, adhesion, migration, proliferation, differentiation, phagocytosis, and apoptosis. In essence, glycosylation therefore belongs to an upstream regulatory layer within signaling networks.
II. Major Types of Cell Surface Glycosylation and Their Structural Basis
2.1 N-glycosylation and O-glycosylation constitute the principal forms of glycoprotein modification
(1) N-glycosylation
N-glycosylation generally occurs at asparagine residues, is initiated in the endoplasmic reticulum, and undergoes further maturation in the Golgi apparatus. This class of glycans plays fundamental roles in protein folding, quality control, membrane localization, and receptor stability, and it is one of the core steps in the maturation of cell surface receptors.
(2) O-glycosylation
O-glycosylation mainly occurs at serine or threonine residues and is widely found in mucin-like proteins, receptor extracellular domains, and secreted proteins. This type of modification often affects protein extended conformation, exposure of proteolytic cleavage sites, and surface adhesion behavior, and it has a pronounced influence on the accessibility of membrane surface signaling.
2.2 Glycolipids and proteoglycans expand the functional dimension of glycosylation
(1) Glycolipids
Glycolipids are located in the outer leaflet of the membrane. Their glycan headgroups participate not only in cell recognition, but also in membrane microdomain formation. Certain glycolipids can directly serve as pathogen-binding sites, lectin ligands, or receptor-organizing platforms.
(2) Proteoglycans
The glycosaminoglycan chains carried by proteoglycans possess high negative charge and substantial chain length, enabling them to enrich growth factors, chemokines, and cytokines, thereby forming local high-concentration signaling reservoirs on the cell surface.
2.3 Terminal modifications define “surface recognition identity”
(1) Sialylation
Terminal sialic acids markedly alter the negative-charge properties of the exposed glycan surface and influence immune recognition, lectin binding, and circulatory clearance behavior.
(2) Fucosylation
Fucose residues often participate in immune recognition, leukocyte rolling, and receptor activation. Alterations in fucosylation are closely associated with inflammation, tumorigenesis, and developmental processes.
(3) Branching extension and capping patterns
The number of glycan branches and the mode of terminal capping determine whether a glycan can be recognized by specific lectins, and also define its spatial occupancy characteristics and functional diversity.
2.4 Overview of glycosylation types and signaling functions
Type of Glycosylation | Major Molecular Targets | Structural Features | Major Effects on Cell Surface Signaling |
N-glycosylation | Receptor proteins, transport proteins, adhesion molecules | Linked through asparagine residues; can form high-mannose, hybrid, and complex glycans | Regulates protein folding, surface expression, ligand binding, and receptor stability |
O-glycosylation | Mucin-like proteins, receptor extracellular domains, secreted proteins | Linked through serine/threonine residues; highly variable in chain length and terminal capping | Regulates extracellular domain extension, adhesion interfaces, and sensitivity to proteolytic cleavage |
Glycolipids | Lipid components of the outer plasma membrane leaflet | Glycan headgroups exposed on the outer membrane surface | Influences lipid raft formation, cell recognition, and membrane surface signal organization |
Proteoglycans/glycosaminoglycans | Membrane proteins and matrix-associated molecules | Long-chain, negatively charged, often sulfated | Enrich growth factors and chemokines, forming local signaling reservoirs |
Terminal sialylation | Multiple glycoproteins and glycolipids | Increases negative charge and hydration layer | Alters immune recognition, receptor clearance, and lectin binding |
Terminal fucosylation | Multiple glycoproteins and glycolipids | Alters terminal spatial conformation | Affects leukocyte adhesion, receptor activation, and immune recognition |
III. How Glycosylation Influences Receptor Folding, Maturation, and Membrane Localization
3.1 Glycans participate in receptor biosynthesis and quality control
(1) Endoplasmic reticulum quality control depends on glycan status
After synthesis, many receptors require N-glycans to participate in endoplasmic reticulum quality control. Glycan trimming and remodeling determine whether the protein continues folding, is retained, is reprocessed, or enters degradation pathways.
(2) Aberrant glycosylation can lead to insufficient surface expression
If key glycosylation sites are absent or glycan processing is impaired, receptors may undergo misfolding, fail in membrane localization, or be prematurely degraded, ultimately leading to reduced surface expression and signaling defects.
3.2 Glycosylation determines receptor residence capacity on the cell surface
(1) Glycans enhance protein stability
By increasing the hydration layer, reducing aggregation tendency, and decreasing nonspecific proteolysis, glycans prolong receptor lifespan on the cell surface.
(2) Glycans affect membrane trafficking efficiency
Some receptors with insufficient glycosylation can complete translation but cannot be stably transported to the membrane surface, leading to a decrease in the number of functionally available receptors.
(3) Glycans alter post-endocytic fate partitioning
Whether receptors are recycled back to the membrane surface or directed to lysosomal degradation after endocytosis is often associated with their glycan pattern and the background of lectin-network recognition.
IV. Glycosylation Regulates Signal Initiation Through Membrane Organization and Receptor Clustering
4.1 Glycans alter the spatial relationships among receptors
(1) Glycans exert pronounced steric effects
Long-chain or highly branched glycans can alter the relative distances between receptor extracellular domains, thereby affecting receptor dimerization, oligomerization, and the probability of contact with coreceptors.
(2) Glycans can regulate receptor nanocluster formation
Many surface receptors are not evenly distributed, but are instead organized in dynamic nanoclusters. By regulating receptor collision frequency and dwell time, glycosylation influences the formation and stability of these microscale signaling platforms.
4.2 Glycosylation is coupled to membrane microdomains
(1) Glycolipids participate in the construction of raft-like microdomains
Together with cholesterol and sphingolipids, glycolipids form more ordered membrane regions that provide clustering platforms for certain receptors and downstream signaling proteins.
(2) Glycoproteins can alter local membrane surface crowding
Changes in receptor glycans affect the overall spatial occupancy and hydration state of the membrane surface, thereby altering the diffusion and rearrangement behavior of neighboring molecules.
4.3 Receptor activation thresholds are finely regulated by glycosylation
(1) Glycan reduction can enhance interface exposure
For some receptors, shortening of glycans makes ligand-binding interfaces more readily exposed, thereby lowering the receptor activation threshold.
(2) Increased glycan complexity can improve recognition precision
Highly complex glycans do not always directly enhance signaling, but may instead improve recognition specificity, enabling receptors to respond only to high-quality stimuli.
V. Lectin Networks Are the “Reading System” for Glycan Information
5.1 Lectins convert glycan differences into signaling events
(1) Endogenous lectins recognize specific glycan patterns
Multiple classes of lectins exist on the cell surface and in the extracellular environment, including galectins, C-type lectins, and the Siglec family. These molecules recognize specific glycan structures and regulate receptor crosslinking, adhesion, and signal transduction accordingly.
(2) Lectin recognition has a platform-organizing function
The binding between lectins and glycans is not static adhesion, but is often accompanied by multimolecular crosslinking, membrane-region rearrangement, and signaling-platform reconstruction. Accordingly, lectins function more as “glycan information decoders.”
5.2 Galectin networks influence receptor residence and signaling duration
(1) They can form extracellular glycan lattices
Galectins can bind multiple glycoproteins simultaneously, thereby constructing dynamic extracellular glycan lattices that enhance receptor residence time on the membrane surface.
(2) They can enhance or buffer signaling output
Glycan lattices may enhance signaling by prolonging receptor surface residence, but they may also suppress certain signaling processes that depend on rapid lateral rearrangement by restricting receptor mobility.
5.3 Siglecs and sialylation constitute an immune inhibitory recognition axis
(1) Sialylated glycans can be read by Siglecs
Receptors of the Siglec family typically recognize sialic acid-capped glycans and transmit inhibitory signals in immune cells.
(2) This axis helps maintain immune homeostasis
The abundance of sialylated glycans on the surface of normal cells helps reduce nonspecific immune attack, whereas abnormal glycan remodeling may alter this balance.
VI. How Glycosylation Regulates Typical Cell Surface Signaling Pathways
6.1 Receptor tyrosine kinase signaling
(1) Glycosylation affects ligand binding and receptor dimerization
Many receptor tyrosine kinases contain multiple N-glycosylation sites. Glycans can influence the conformational stability of extracellular domains, thereby altering ligand-binding affinity, receptor dimerization probability, and autophosphorylation efficiency.
(2) Glycan branching can prolong surface residence time
Certain complex branched glycans can enhance the stable persistence of receptors on the cell surface, thereby promoting sustained growth signaling.
6.2 Immune receptor signaling
(1) T cell receptors and costimulatory molecules are influenced by glycan context
Glycosylation can affect the spatial organization of the T cell receptor complex, the stability of the immune synapse, and the effective activation threshold of costimulatory molecules.
(2) B cell receptors and Fc receptors are likewise regulated by glycosylation
Glycans affect not only the receptors themselves, but also antigen recognition and downstream amplification processes through lectin recognition and changes in the membrane surface microenvironment.
6.3 Adhesion receptors and migration signaling
(1) Selectin recognition depends on specific glycan epitopes
Leukocyte rolling and initial adhesion processes depend on the interaction between selectins and specific glycan epitopes. Glycosylation is therefore one of the prerequisites for cellular migration.
(2) Integrin activation is influenced by glycosylation state
Glycans can alter integrin conformational switching, ligand-binding efficiency, and coupling to the cytoskeleton, thereby influencing cell adhesion, migration, and mechanotransduction.
6.4 Overview of glycosylation functions in typical cell surface signaling pathways
Receptor/Pathway Type | Major Glycosylation-Dependent Regulatory Points | Typical Functional Outcome | Representative Biological Consequences |
Receptor tyrosine kinases | Ligand binding, dimerization, membrane residence time | Alters autophosphorylation intensity and signaling duration | Proliferation, differentiation, tumor progression |
T cell receptor complex | Immune synapse organization, costimulatory threshold | Alters T cell activation sensitivity | Immune response intensity, tolerance establishment |
B cell receptor/Fc receptor | Antigen recognition and membrane microdomain rearrangement | Alters downstream activation and phagocytic effects | Antibody responses, inflammatory amplification |
Selectin-glycan epitope axis | Initial rolling and adhesion recognition | Alters leukocyte recruitment efficiency | Inflammatory migration, immune surveillance |
Integrin signaling | Conformational switching, adhesion coupling | Alters migration and mechanotransduction | Tissue infiltration, cell adhesion |
Siglec-sialic acid axis | Inhibitory recognition and immune braking | Lowers activation thresholds or enhances inhibitory signaling | Immune homeostasis, immune evasion |
VII. Effects of Glycosylation on Signal Termination, Endocytosis, and Receptor Fate Partitioning
7.1 Glycans affect receptor endocytic efficiency
(1) Glycans can regulate the recognition background for endocytosis
Receptor glycan patterns affect interactions with endocytosis-related proteins and lectin networks, thereby altering endocytic rates.
(2) Glycan changes can reset signaling duration
If glycans cause receptors to remain on the membrane surface for prolonged periods, signaling duration is extended; if endocytosis is enhanced, signaling is more readily terminated rapidly.
7.2 Glycosylation determines the choice between recycling and degradation pathways
(1) Specific glycan patterns favor receptor recycling
Certain glycosylation states facilitate the return of receptors from endosomes to the membrane surface, thereby maintaining the capacity for subsequent signaling responses.
(2) Aberrant glycans can promote degradation
If glycans are incomplete or abnormally processed, receptors are more likely to be directed to lysosomal degradation, leading to diminished surface signaling capacity.
VIII. How Aberrant Glycosylation Causes Signaling Imbalance and Disease Phenotypes
8.1 Glycan reprogramming in tumors
(1) Aberrant glycosylation can enhance growth signaling
Tumor cells are often characterized by increased glycan branching, enhanced sialylation, and accumulation of truncated O-glycans. These changes can enhance receptor residence and sustain growth signaling.
(2) Aberrant glycans can promote immune evasion
Certain forms of glycan remodeling enhance recognition by inhibitory lectins and attenuate immune cell activation, thereby creating a tumor immune evasion environment.
8.2 Glycan mismatching in inflammation and immune diseases
(1) Aberrant glycosylation affects immune cell migration
Changes in key glycan epitopes can directly alter leukocyte rolling, adhesion, and tissue extravasation capacity.
(2) Aberrant glycosylation can reset immune thresholds
Alterations in receptor glycosylation may lead either to excessive immune cell activation or insufficient activation, corresponding respectively to autoimmune tendencies and immunohyporesponsive states.
8.3 Signaling abnormalities in congenital disorders of glycosylation
(1) Maturation of multiple membrane proteins is impaired
Defects in glycosylation cause widespread abnormalities in the folding, transport, and stability of numerous surface proteins, resulting in systemic phenotypes.
(2) Signaling networks undergo broad deviation
Because glycosylation represents an information layer shared across receptors, its abnormalities often manifest as multipathway, multiorgan signaling disorders.
IX. Experimental Strategies for Studying Glycosylation-Mediated Regulation of Cell Surface Signaling
9.1 Structural-level analytical approaches
(1) Glycomics and glycoproteomics
These approaches are used to characterize glycan composition, branching pattern, terminal modification, and site occupancy, and they provide the foundation for understanding structural glycan changes.
(2) Site-directed mutagenesis
By removing or reconstructing specific glycosylation sites, the effects of a particular glycan on receptor conformation and function can be directly evaluated.
9.2 Functional-level analytical approaches
(1) Receptor activation and downstream readouts
The functional consequences of glycosylation can be evaluated through receptor phosphorylation, downstream pathway activation, endocytic rates, and cellular phenotypic changes.
(2) Lectin probes and surface imaging
Lectin probes, flow cytometry, and membrane surface imaging can be used to observe changes in glycan patterns and their relationships with receptor organizational states.
9.3 Integrated mechanistic studies
(1) Manipulation of glycosyltransferases and glycosidases
Regulating the expression of key glycan metabolic enzymes helps elucidate how glycan changes causally alter signaling output.
(2) Membrane microdomain and single-molecule analysis
Super-resolution imaging, single-molecule tracking, and membrane dynamics studies can reveal how glycosylation affects receptor nanoscale organization and membrane behavior.
X. Aladdin-Related Products
10.1 Products Related to Core Regulation of N-Glycosylation and O-Glycosylation
Catalog No. | Name | Grade and Purity | Suitable Research Direction/Application |
NGI 1 | ≥98%(HPLC) | Inhibition of N-glycosylation initiation; studies on receptor maturation, surface expression, and signaling thresholds | |
Protein O-Fucosyltransferase 1 |
| O-fucosylation studies; mechanistic analysis of glycosylation on the extracellular domains of Notch-like receptors | |
Protein O-Glucosyltransferase 1 |
| O-glucosylation studies; functional validation of glycosylation on extracellular receptor repeat domains | |
Mannosyl-oligosaccharide 1,2-α-mannosidase IA |
| Studies on N-glycan trimming and maturation processing; glycan quality-control analysis | |
PNGase F (Glycerol-free) (MS) | Animal Free, Carrier Free, Bioactive, Recombinant, suitable for mass spectrometry (MS), ActiBioPure™, EnzymoPure™, for protein sequencing, ≥95%(SDS-PAGE), 100000 U/mL | N-glycan removal; glycoprotein site analysis and pretreatment for mass spectrometry | |
PNGase F (MS) | Animal Free, Carrier Free, Bioactive, Recombinant, suitable for mass spectrometry (MS), ActiBioPure™, EnzymoPure™, for protein sequencing, ≥95%(SDS-PAGE), 100000 U/mL | N-glycan removal; glycoprotein structural analysis and glycan occupancy studies | |
N-Glycosidase F, Elizabethkingia meningosepticum | ≥20,000 units/mg protein；≥4500 units/mL | Global removal of N-glycans; validation of glycoprotein deglycosylation | |
PNGase F from Elizabethkingia miricola | buffered aqueous solution | N-glycan removal; glycan structural analysis and glycoprotein identification | |
PNGase F from Elizabethkingia meningoseptica | BioReagent, Proteomics grade, ≥95%(SDS-PAGE) | N-glycan cleavage; pretreatment for proteomics and glycoproteomics | |
Endoglycosidase H from Streptomyces plicatus | Recombinant, expressed in E. coli, buffered aqueous solution | Analysis of high-mannose/hybrid N-glycans; studies on ER-Golgi processing status | |
Endoglycosidase H, Streptomyces plicatus, Recombinant, E. coli | Endoglycosidase H, Streptomyces plicatus, Recombinant, E. coli | N-glycan processing subtype analysis; receptor maturation and glycan sensitivity analysis | |
Recombinant O-Glycosidase | Bioactive, ActiBioPure™, High Performance, EnzymoPure™, His Tag, ≥10000U/mg protein | O-glycan removal; functional validation of glycosylation in mucin-like extracellular domains | |
Recombinant O-Glycosidase (MS Grade) | Animal Free, Carrier Free, Bioactive, suitable for mass spectrometry (MS), ActiBioPure™, for protein sequencing, His Tag, ≥90%(SDS-PAGE), ≥40000U/μl | O-glycan structural analysis; pretreatment of glycoprotein samples for mass spectrometry |
10.2 Products Related to Terminal Glycan Modification
Catalog No. | Name | Grade and Purity | Suitable Research Direction/Application |
alpha-1,2-Fucosyltransferase (α1,2FucT) |
| Construction of terminal fucosylation; studies on remodeling of cell-surface recognition epitopes | |
Human Galactoside 2-alpha-L-fucosyltransferase 2 (FUT2) ELISA Kit | BioReagent | FUT2 expression analysis; studies on terminal fucosylation and surface recognition | |
Fucosyltransferase 6 |
| Fucosylation studies; analysis of adhesion-related glycoepitope construction | |
Mouse Alpha- (1,6) -fucosyltransferase (FUT8) ELISA Kit | BioReagent | FUT8 expression analysis; studies on core fucosylation and receptor activation | |
Fucosyltransferase 8 |
| Core fucosylation studies; mechanistic analysis of receptor dimerization and signal enhancement | |
Fucosyltransferase 9 |
| Terminal fucosylation studies; analysis of immune-recognition glycoepitope regulation | |
beta-1,3-Galactosyltransferase (CgtB) |
| Galactose extension modification; construction of lectin-recognized glycans | |
α-1,4-Galactosyltransferase | EnzymoPure™, ≥95%(SDS-PAGE) | Galactosylation studies; analysis of terminal glycan structure extension | |
Beta-1,4-Galactosyltransferase 1 (Y285L) | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, expressed in HEK293；>1000 U/mg protein；Protein concentration: See COA | Construction of β1,4-galactosylation; glycoengineering and receptor surface glycan remodeling | |
Beta-1,4-galactosyltransferase 1 | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, expressed in Baculovirus-BTI-TN-5B1-4 Cells；>2000 U/mg protein；Protein concentration: See COA | β1,4-galactosylation modification; studies on cell-surface glycan extension | |
Bovin beta-1,4-galactosyltransferase 1 | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, expressed in Baculovirus-BTI-TN-5B1-4 Cells；>2000 U/mg protein；Protein concentration: See COA | Galactosylation engineering; construction of terminal glycoprotein structures | |
Bovin beta-1,4-galactosyltransferase 1 (Y289L) | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, expressed in HEK293；>1000 U/mg protein；Protein concentration: See COA | Directed galactosylation engineering; studies on cell-surface glycan engineering | |
Mouse Beta-1,4-galactosyltransferase 1 (Y286L) | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, >2000 U/mg protein；Protein concentration: See COA；expressed in HEK293 | Mouse-derived galactosylation modification; studies on receptor glycan conformation | |
β-1,4-Galactosyltransferase, neisseria meningitides |
| Construction of galactosylated glycans; glycoepitope engineering studies | |
ST3 β-Gal α-2,3-Sialyltransferase 1 |
| α2,3-sialylation studies; analysis of lectin recognition and immune regulation | |
ST3 β-Gal α-2,3-Sialyltransferase 5 |
| α2,3-sialylation modification; studies on cell-surface glycan capping | |
ST6 Sialyltransferase 1 |
| α2,6-sialylation studies; analysis of Siglec recognition and the immune-inhibitory axis | |
ST6 Sialyltransferase 4 |
| α2,6-sialylation regulation; studies on cell-surface capping patterns | |
ST6 Sialyltransferase 5 |
| α2,6-sialylation modification; studies on surface negative charge and recognition identity | |
ST8 alpha-2,8-Sialyltransferase 4 |
| α2,8-polysialylation studies; analysis of receptor spacing and membrane-surface organization | |
ST8 alpha-2,8-Sialyltransferase 6 |
| α2,8-sialylation extension studies; remodeling of cell-surface recognition patterns | |
ST8 alpha-2,8-Sialyltransferase 8B |
| Polysialylation studies; analysis of membrane-surface signal buffering effects | |
α-2,3-Sialyltransferase from Pasteurella multocida | Recombinant, expressed in E. coli BL21, ≥2 units/mg protein | Construction of α2,3-sialylation; studies on glycan capping and ligand recognition | |
α-2,6-Sialyltransferase, pasteurella multocida (P-1059) |
| Construction of α2,6-sialylation; studies on immunosuppressive glycans | |
α-2,6-Sialyltransferase from Photobacterium damsela | Recombinant, expressed in E. coli BL21, ≥5 units/mg protein | α2,6-sialylation engineering; studies on Siglec ligand construction | |
alpha-2,8-Sialyltransferase (CstII) |
| Studies on α2,8-sialylation and polysialic acid-related mechanisms |
10.3 Products Related to Glycan Removal and Functional Validation
Catalog No. | Name | Grade and Purity | Suitable Research Direction/Application |
α-1,2-Fucosidase solution | buffered aqueous solution | Removal of α1,2-fucose residues; functional validation of terminal fucosylation | |
α-1→(2,3,4)-Fucosidase solution from Xanthomonas sp. | buffered aqueous solution | Removal of fucose with multiple linkage types; glycoepitope mapping analysis | |
α1-3,4-Fucosidase, Xanthomonas sp. | Native α1-3,4-fucosidase from Xanthomonas species. Catalyzes the hydrolysis of α1,3- and α1,4-linked branched, non-reducing terminal fucose from complex carbohydrates. Note: 1 mU = 1 milliunit. | Removal of α1,3/α1,4-fucose; validation of inflammation-adhesion-related glycoepitopes | |
Recombinant α-1,6-Fucosidase (LpAlfC) | Bioactive, ActiBioPure™, High Performance, EnzymoPure™, His Tag, ≥90%(SDS-PAGE), ≥500 U/mg protein | Removal of core α1,6-fucose; functional validation of core fucosylation | |
Recombinant α1-3,4 Fucosidase (BbAfcB) | Bioactive, Recombinant, ActiBioPure™, High Performance, EnzymoPure™, His Tag, ≥90%(SDS-PAGE), ≥2U/mg protein；protein concentration: 5-10mg/ml | Removal of α1,3/α1,4-fucose; fine analysis of glycan epitopes | |
alpha-2-3,6-sialidase (BiNanH2) |
| Removal of α2,3/α2,6-sialic acid; functional validation of sialic acid capping | |
Sialidase (a2-3,6,8) | Animal Free, Carrier Free, Bioactive, Recombinant, suitable for mass spectrometry (MS), ActiBioPure™, EnzymoPure™, for protein sequencing, ≥95%(SDS-PAGE), ≥50U/μL；expressed in E.coli | Removal of α2,3/6/8-sialic acid; pretreatment for mass spectrometry and identification of sialylation | |
Sialidase (a2-3,6,8,9) | Animal Free, Carrier Free, Bioactive, Recombinant, suitable for mass spectrometry (MS), ActiBioPure™, EnzymoPure™, for protein sequencing, ≥95%(SDS-PAGE), ≥50U/μL；expressed in E.coli | Broad-spectrum desialylation; analysis of complex sialic acid capping patterns | |
Sialidase (α2-3-6-8-9) |
| Broad-spectrum desialylation; studies on cell-surface recognition and receptor residence | |
α(2→3,6,8,9) Neuraminidase from Arthrobacter ureafaciens | Proteomics grade, suitable for MALDI-TOF MS | Desialylation; structural analysis of glycoproteins by mass spectrometry | |
α(2→3,6,8,9) Neuraminidase from Arthrobacter ureafaciens | Recombinant, expressed in E. coli, buffered aqueous solution | Removal of multiple neuraminic acid residue types; functional validation of surface glycans | |
α2-3,6-Neuraminidase, Clostridium perfringens, Recombinant, E. coli |
| Removal of α2,3/α2,6-sialic acid; studies on exposure of receptor recognition interfaces | |
Neuraminidase (NRH) | EnzymoPure™, Bioactive, ActiBioPure™, High Performance, ≥90%(SDS-PAGE), ≥300 U/mg protein | Functional validation of desialylation; analysis of glycan capping patterns | |
Neuraminidase from Clostridium perfringens | EnzymoPure™, ≥0.5 units/mg dry weight | Desialylation; studies on remodeling of receptor surface glycans | |
Neuraminidase from Clostridium perfringens(Purified) | EnzymoPure™, ≥10 units/mg protein | Functional validation of desialylation; studies on receptor clustering and lectin recognition | |
Neuraminidase from Clostridium perfringens (C. welchii) | Type X, lyophilized powder, ≥50 units/mg protein (using 4MU-NANA) | Desialylation; analysis of surface glycan-dependent signaling | |
Neuraminidase from Clostridium perfringens (C. welchii) | Type VI, lyophilized powder, 6-15 units/mg protein (using 4MU-NANA), 2-10 units/mg protein (mucin) | Desialylation; studies on mucin-like glycans | |
Neuraminidase from Clostridium perfringens (C. welchii) | Type VIII, lyophilized powder, 10-20 units/mg protein (using 4MU-NANA), 3.5-8.0 units/mg protein (mucin) | Removal of sialic acid; validation of sialic acid capping-dependent signaling | |
Neuraminidase from Vibrio cholerae | sterile-filtered, Type III, buffered aqueous solution, 1-5 units/mg protein (Lowry, using NAN-lactose) | Desialylation; functional analysis of terminal glycan modifications | |
Neuraminidase from Vibrio cholerae | Type II, buffered aqueous solution, 8-24 units/mg protein (Lowry, using NAN-lactose) | Desialylation; studies on removal of cell-surface glycan capping | |
Recombinant Endo-β-galactosidase (BfEndoβGal) | Bioactive, ActiBioPure™, High Performance, EnzymoPure™, His Tag, ≥1000 U/mg protein | Cleavage of galactose-extended chains such as polyLacNAc; structural validation of lectin ligand chains |
10.4 Products Related to Glycolipids and Gangliosides
Catalog No. | Name | Grade and Purity | Suitable Research Direction/Application |
Recombinant endoglycoceramidase I |
| Glycolipid deglycosylation; studies on ganglioside-related membrane signaling | |
rEGCase II | EnzymoPure™, 2000 MU/mL | Glycolipid headgroup cleavage; functional validation of outer-membrane glycolipids | |
Recombinant endoglycoceramidase I assisted by activator II |
| Enhanced glycolipid hydrolysis systems; studies on ganglioside-dependent recognition | |
Recombinant endoglycoceramidase II assisted by activator II |
| Ganglioside deglycosylation; analysis of glycolipid platform functions | |
Ganglioside sialidase (AuSialidase M2) |
| Ganglioside desialylation; studies on glycolipid-membrane microdomain signaling | |
Ganglioside sialidase (AuSialidase S) |
| Analysis of terminal ganglioside modification; functional validation of glycolipid recognition |
The relationship between glycosylation-mediated regulation and cell surface signaling is not a local effect of a single glycan on a single receptor, but rather a multilayered information system jointly constituted by glycan structure, lectin networks, membrane microdomain organization, receptor conformation, and endocytic fate. Glycans are not only recognition-encoding elements, but also major components of membrane surface organizational rules and of signaling amplification or buffering mechanisms. Only by understanding glycosylation within the continuous framework of “molecular structure–membrane organization–receptor behavior–cell fate” can its true regulatory roles in complex biological processes such as development, immunity, inflammation, and tumorigenesis be accurately defined.