GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity catalyzes transfer of L-fucose from GDP-L-fucose to a terminal beta-D-galactosyl residue, forming an alpha(1,2)-fucosyl linkage.
• The reaction produces the H blood group antigen and is encoded by the secretor-type FUT2 gene and the H gene (FUT1).
• The enzyme is a Golgi-resident type II transmembrane glycosyltransferase that uses GDP-L-fucose as the donor substrate.
• Secretor-type activity is abundant in human gastric mucosa and respiratory epithelium, where it modifies secreted and membrane glycoconjugates.
• Alpha(1,2)-fucosylation is conserved in plants, where Arabidopsis thaliana alpha1,2-L-fucosyltransferase transfers L-galactose to xyloglucan oligosaccharides.
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal dissection of GO:0008107 in blood group biology, infection, and cancer.
Description
GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity is a molecular function defined by the reaction GDP-L-fucose + beta-D-galactosyl-R = GDP + alpha-L-fucosyl-(1,2)-beta-D-galactosyl-R. This activity installs a terminal alpha(1,2)-linked L-fucose onto galactose-containing acceptors and is the biosynthetic step that generates the H blood group antigen. The enzyme was first characterized biochemically in human tissues, including tracheal epithelium and cervical epithelium, where its kinetic properties and acceptor specificity were established. Molecular cloning of the human cDNA confirmed that a single polypeptide can form the H antigen and defined the H blood group locus. Subsequent work identified the secretor-type enzyme encoded by FUT2 and described its gene structure and expression pattern. Because alpha(1,2)-fucosylation decorates glycoproteins and glycolipids on cell surfaces and in secretions, the activity influences blood group serology, host-microbe interactions, and cell signaling. The same catalytic activity is conserved in plants, where it modifies xyloglucan oligosaccharides, indicating a deep evolutionary role in cell wall and glycoconjugate biology. Researchers study GO:0008107 to understand glycan-mediated recognition, to engineer blood group-compatible cells, and to probe fucosylation-dependent disease mechanisms.
galactoside 2-alpha-L-fucosyltransferase activity At A Glance
| GO ID | GO:0008107 |
|---|---|
| GO term | galactoside 2-alpha-L-fucosyltransferase activity |
| Ontology | molecular_function |
| Synonym | alpha(1,2)-L-fucosyltransferase activity; blood group H alpha-2-fucosyltransferase activity; secretor-type beta-galactoside alpha1->2 fucosyltransferase activity |
| Major function | Transfer of L-fucose from GDP-L-fucose to a terminal beta-D-galactosyl acceptor to form an alpha(1,2)-fucosyl linkage |
| Reaction | GDP-L-fucose + beta-D-galactosyl-R = GDP + alpha-L-fucosyl-(1,2)-beta-D-galactosyl-R |
| Donor substrate | GDP-L-fucose |
| Acceptor substrate | beta-D-galactosyl-R, including lactose and glycoprotein/galactolipid acceptors |
| Cellular localization | Golgi apparatus of mammalian cells |
| Representative genes | FUT1 (H gene), FUT2 (secretor-type) |
What Is GO:0008107?
In plain terms, GO:0008107 describes an enzyme that takes a fucose sugar from GDP-L-fucose and attaches it to a galactose sugar that is already part of a larger molecule, creating an alpha(1,2) linkage. The official definition is: Catalysis of the reaction: GDP-L-fucose + beta-D-galactosyl-R = GDP + alpha-L-fucosyl-(1,2)-beta-D-galactosyl-R. The activity is also known as alpha(1,2)-L-fucosyltransferase, blood group H alpha-2-fucosyltransferase, and secretor-type beta-galactoside alpha1->2 fucosyltransferase. It belongs to the molecular_function aspect of the Gene Ontology and is mediated by Golgi-resident glycosyltransferases such as those encoded by FUT1 and FUT2.
Why Is galactoside 2-alpha-L-fucosyltransferase activity Important in Cell Biology?
GO:0008107 is important because alpha(1,2)-fucosylation creates the H antigen, the precursor of A and B blood group antigens, and thereby determines blood group serology and transfusion compatibility. The activity also modifies secreted mucins and epithelial glycoconjugates, influencing mucosal barrier properties and host-microbe interactions. Because fucosylation is a terminal glycan modification, it can alter receptor-ligand recognition and cell signaling, making the enzyme relevant to inflammation and cancer biology. In plants, the conserved activity modifies xyloglucan oligosaccharides, linking GO:0008107 to cell wall biology. Consequently, the function is a target for glycoengineering, blood group conversion, and mechanistic studies of fucosylation-dependent disease.
• Defines the H blood group antigen and thus the biosynthetic foundation of ABO blood group diversity.
• Secretor-type activity in gastric mucosa and respiratory epithelium modifies secreted glycoproteins and mucins.
• Controls terminal alpha(1,2)-fucosylation of glycoproteins and glycolipids, affecting cell surface recognition.
• Influences host-microbe interactions through fucosylated mucosal glycans.
• Contributes to fucosylation-dependent signaling in hyperproliferative skin disease models.
• Conserved in plants for xyloglucan oligosaccharide modification, linking to cell wall function.
• Enables glycoengineering of cells for blood group conversion and synthetic glycobiology.
• Provides a biochemical marker for epithelial differentiation and secretory cell function.
• Supports studies of glycosyltransferase kinetics, acceptor specificity, and Golgi enzyme topology.
• Offers a target for CRISPR-based dissection of glycan-mediated disease mechanisms.
What Happens During galactoside 2-alpha-L-fucosyltransferase activity?
Substrate recognition and donor binding
In simple terms: The enzyme first grabs a fucose-loaded carrier molecule and a sugar acceptor.
The reaction uses GDP-L-fucose as the donor substrate and a beta-D-galactosyl-R acceptor, which can include lactose, glycoproteins, or glycolipids. Biochemical characterization of the human tracheal epithelial enzyme showed strict dependence on GDP-L-fucose and terminal beta-galactose acceptors. Purification from human gastric mucosa confirmed that the secretory-type enzyme recognizes GDP-L-fucose and beta-D-galactoside substrates.
Catalytic transfer and alpha(1,2) linkage formation
In simple terms: The enzyme moves the fucose onto the galactose and creates a specific alpha(1,2) bond.
Catalysis proceeds by transfer of L-fucose from GDP-L-fucose to the acceptor galactose, releasing GDP and forming alpha-L-fucosyl-(1,2)-beta-D-galactosyl-R. Expression of the cloned human cDNA in transfected cells demonstrated that this single activity can form the H blood group antigen. The enzyme is therefore responsible for the terminal alpha(1,2)-fucosyl linkage that defines the H determinant.
Golgi processing and product display
In simple terms: The modified sugar is displayed on the cell surface or in secretions.
The enzyme is a Golgi-resident glycosyltransferase, so the fucosylated products are displayed on cell surfaces and secreted glycoconjugates. Secretor-type activity is abundant in human gastric mucosa, where it modifies secreted mucins and epithelial glycans. In respiratory epithelium, the activity modifies tracheal mucins and other glycoproteins.
Conservation and alternative acceptor use
In simple terms: Related enzymes in other organisms use the same chemistry on different acceptors.
Arabidopsis thaliana alpha1,2-L-fucosyltransferase catalyzes transfer of L-galactose to xyloglucan oligosaccharides, showing that the alpha(1,2)-linkage chemistry is conserved beyond mammals. Human cervical epithelium contains a beta-galactoside alpha-2-L-fucosyltransferase activity that was biochemically distinguished from alpha-3-fucosyltransferase. These findings indicate that GO:0008107 encompasses a family of enzymes with related catalytic chemistry but distinct acceptor preferences.
Key Genes Involved in GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity
The following genes and proteins are directly associated with galactoside 2-alpha-L-fucosyltransferase activity or its regulation.
| Gene | Major Role | Research Relevance |
|---|---|---|
| FUT1 | H gene encoding an alpha(1,2)-fucosyltransferase that forms the H antigen | Blood group serology, glycoengineering, transfection models |
| FUT2 | Secretor-type galactoside 2-alpha-L-fucosyltransferase | Secretor status, mucosal glycans, gene structure and expression |
| FUT11 | Fucosyltransferase implicated in K63 ubiquitination of keratin 17 | Psoriatic keratinocyte hyperproliferation models |
| GDP-L-fucose donor pathway enzymes | Supply GDP-L-fucose for fucosylation reactions | Substrate availability and kinetic studies |
| Golgi trafficking machinery | Localizes the enzyme to the Golgi for glycan processing | Subcellular localization and secretion studies |
| Mucin core proteins | Acceptors modified by alpha(1,2)-fucosylation in epithelium | Mucin biosynthesis and epithelial differentiation |
| Keratin 17 | Target of fucosylation-dependent ubiquitination in psoriasis models | Inflammation and hyperproliferation research |
| Xyloglucan oligosaccharides | Plant acceptor substrates for alpha1,2-L-fucosyltransferase | Plant cell wall biology |
| Lactose | Simple acceptor used in enzyme assays | Kinetic characterization of the transferase |
| Glycoprotein acceptors | Endogenous substrates for alpha(1,2)-fucosylation | Glycoproteomics and mucin research |
| Glycolipid acceptors | Membrane glycan substrates for fucosylation | Glycolipid biology and cell surface recognition |
| H blood group locus | Genetic locus encoding the H antigen-forming activity | Transfection and locus transfer experiments |
| Secretor locus | Genetic locus for the secretor-type enzyme | Population genetics and expression studies |
| Cervical epithelium fucosyltransferases | Alpha-2-L-fucosyltransferase activity in human cervix | Reproductive tract glycan biology |
| Gastric mucosa enzymes | Secretory-type fucosyltransferase source for purification | Enzyme purification and characterization |
| Tracheal epithelial enzymes | Mucin biosynthesis-associated fucosyltransferase | Airway mucin research |
How Is galactoside 2-alpha-L-fucosyltransferase activity Regulated?
Regulation of galactoside 2-alpha-L-fucosyltransferase activity occurs at multiple levels. Gene expression of FUT2 is tissue-specific and defines secretor status, with the gene structure and expression pattern characterized in human tissues. The enzyme requires GDP-L-fucose, so flux through the GDP-L-fucose biosynthetic pathway controls substrate availability for the reaction. Golgi localization is necessary for the enzyme to access acceptor glycans, and the cloned enzyme expressed in transfected cells retains the ability to form the H antigen, indicating that correct subcellular targeting is required for activity. In disease contexts, fucosylation-dependent signaling has been linked to K63 ubiquitination of keratin 17 in psoriatic keratinocytes, suggesting that fucosylation pathways can be regulated during hyperproliferative responses. Plant alpha1,2-L-fucosyltransferase activity toward xyloglucan oligosaccharides indicates that acceptor availability also regulates product formation in non-mammalian systems.
galactoside 2-alpha-L-fucosyltransferase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| FUT1 | H blood group antigen biosynthesis and transfusion compatibility | Knockout and knock-in cell lines with blood group typing |
| FUT2 | Secretor status and mucosal glycan phenotype | Isogenic secretor/non-secretor epithelial models |
| FUT11 | Psoriatic keratinocyte hyperproliferation | Overexpression and knockout keratinocyte models |
| Mucin glycoproteins | Gastric and airway mucosal barrier biology | Mucin-producing epithelial cell models |
| Xyloglucan-related plant enzymes | Plant cell wall glycobiology | Arabidopsis mutant and overexpression lines |
Blood group and transfusion biology
GO:0008107 directly underlies H antigen biosynthesis, and the H blood group locus was isolated by transfer of the activity into transfected cells. Because H antigen is the precursor for A and B antigens, altered or absent alpha(1,2)-fucosyltransferase activity changes blood group phenotype and is central to transfusion compatibility. The secretor-type enzyme encoded by FUT2 further modifies secreted glycans, influencing serological and mucosal phenotypes.
Epithelial and mucosal disease
Secretor-type activity is abundant in human gastric mucosa and respiratory epithelium, where it modifies mucins and secreted glycoproteins. Changes in alpha(1,2)-fucosylation of mucosal glycans can affect barrier function and host-microbe interactions, making the activity relevant to gastric and airway disease research. Biochemical characterization of the cervical epithelium enzyme also links the activity to reproductive tract glycan biology.
Inflammation and hyperproliferative skin disease
FUT11-driven fucosylation coordinates K63 ubiquitination of keratin 17 to sustain psoriatic keratinocyte hyperproliferation, demonstrating that fucosylation pathways related to GO:0008107 chemistry contribute to inflammatory skin disease mechanisms. This provides a model for testing whether alpha(1,2)-fucosylation or related fucosyltransferase activities modulate keratinocyte signaling.
Plant cell wall and glycobiology
Arabidopsis thaliana alpha1,2-L-fucosyltransferase catalyzes transfer of L-galactose to xyloglucan oligosaccharides, connecting the conserved alpha(1,2)-linkage chemistry to plant cell wall biology. This cross-kingdom conservation makes GO:0008107 useful for comparative glycobiology and for engineering plant glycans.
From galactoside 2-alpha-L-fucosyltransferase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of alpha(1,2)-fucosyltransferase activity abolish H antigen expression? | FUT1 or FUT2 knockout cell line with H antigen staining |
| Which residues are required for catalytic transfer? | Point-mutation knock-in of catalytic residues in FUT1/FUT2 |
| Can a tagged enzyme be tracked through the Golgi? | Knock-in of an epitope-tagged FUT1/FUT2 |
| Does overexpression increase alpha(1,2)-fucosylation of glycoproteins? | Overexpression cell model with glycan profiling |
| Does fucosylation regulate keratinocyte proliferation? | FUT11 overexpression and knockout keratinocytes |
| Is the alpha(1,2)-linkage chemistry conserved in plants? | Arabidopsis alpha1,2-L-fucosyltransferase mutant and overexpression lines |
How to Study the galactoside 2-alpha-L-fucosyltransferase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Radiochemical fucosyltransferase assay | Transfer of radiolabeled fucose to acceptor | Enzyme kinetics and acceptor specificity |
| Lectin staining | H antigen and alpha(1,2)-fucosylated glycans | Cell surface glycan phenotyping |
| Glycan profiling | Structures of fucosylated glycoproteins and glycolipids | Mucin and membrane glycan analysis |
| Transcript analysis | FUT2 and related gene expression | Secretor status and tissue distribution |
| Transfection and expression | H antigen formation from cloned cDNA | Functional validation of enzyme genes |
| CRISPR knockout | Loss-of-function phenotype | Causal testing of fucosylation in cells |
| CRISPR point mutation | Residue-level catalytic requirements | Structure-function studies of the enzyme |
| Overexpression | Gain-of-function glycan changes | Glycoengineering and disease modeling |
Enzyme activity assays
Radiochemical or fluorescent acceptor assays using GDP-L-fucose and beta-D-galactoside acceptors measure galactoside 2-alpha-L-fucosyltransferase activity directly. These assays were used to characterize the human tracheal epithelial and gastric mucosa enzymes and to define acceptor specificity. Cervical epithelium enzyme assays distinguished alpha-2-L-fucosyltransferase from alpha-3-L-fucosyltransferase activity.
Glycan and lectin profiling
Lectin staining and glycan profiling detect H antigen and terminal alpha(1,2)-fucosylated structures on cells and secreted glycoproteins. Transfected cells expressing the cloned cDNA can be analyzed for H antigen formation to confirm activity. Mucin and glycoprotein fractions from epithelial cells can be probed for fucosylation changes.
Gene expression and transcript analysis
Expression of FUT2 and related genes can be measured by transcript analysis to define secretor status and tissue distribution. Gene structure and expression studies of FUT2 provide a framework for interpreting regulatory variants. Comparative expression in plant tissues can reveal conservation of alpha1,2-L-fucosyltransferase genes.
CRISPR-based functional genomics
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of GO:0008107 in blood group biology, mucosal glycan function, and fucosylation-dependent disease. These models can be combined with glycan profiling and signaling assays to link enzyme activity to phenotype.
How CRISPR Can Be Used to Study GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity
Knockout
CRISPR knockout of FUT1 or FUT2 can abolish galactoside 2-alpha-L-fucosyltransferase activity and remove H antigen expression, providing a clean loss-of-function model to test the role of GO:0008107 in blood group biology and mucosal glycan function. Knockout cells can be profiled by lectin staining and glycan analysis to confirm the expected glycan changes.
Point Mutation
Point-mutation knock-in can be used to test catalytic residues and acceptor-binding determinants identified from enzyme characterization studies. Because the cloned cDNA can form H antigen in transfected cells, targeted mutations can be designed to separate catalytic activity from Golgi localization. Such models help define structure-function relationships within GO:0008107.
Knock-in
Knock-in of epitope-tagged FUT1 or FUT2 allows tracking of the enzyme through the secretory pathway and correlation of localization with activity. Knock-in of disease-associated or secretor-status-associated variants can test their effect on enzyme function and glycan products. These models are useful for studying Golgi-resident glycosyltransferases in their native genomic context.
Overexpression
Overexpression of FUT1, FUT2, or related fucosyltransferases increases alpha(1,2)-fucosylation and can be used to model gain-of-function glycan phenotypes. Overexpression models are particularly useful for testing whether increased fucosylation alters cell signaling, as shown for FUT11-driven keratinocyte hyperproliferation. They also support glycoengineering applications such as enhancing H antigen display.
How EDITGENE Supports galactoside 2-alpha-L-fucosyltransferase activity Research
Researchers studying galactoside 2-alpha-L-fucosyltransferase activity-related genes often need to determine whether a candidate gene is causally involved in glycan phenotype, blood group antigen expression, or fucosylation-dependent disease. EDITGENE provides publication-ready CRISPR cell models and screening services to test these hypotheses with validated edits and functional readouts.
Contact EDITGENE today to design your custom CRISPR model for galactoside 2-alpha-L-fucosyltransferase activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| FUT1 Knockout HEK293 Cell Line | EDJ-KQ2701 | Human | 2523 | Details Get a Quote |
| FUT2 Knockout HEK293 Cell Line | EDJ-KQ4641 | Human | 2524 | Details Get a Quote |
| FUT1 Knockout HCT 116 Cell Line | EDJ-KQ23540 | Human | 2523 | Details Get a Quote |
| FUT2 Knockout HCT 116 Cell Line | EDJ-KQ27327 | Human | 2524 | Details Get a Quote |
| FUT1 Knockout HeLa Cell Line | EDJ-KQ53275 | Human | 2523 | Details Get a Quote |
| FUT2 Knockout HeLa Cell Line | EDJ-KQ53276 | Human | 2524 | Details Get a Quote |
| FUT1 Knockout A-549 Cell Line | EDJ-KQ61757 | Human | 2523 | Details Get a Quote |
| FUT2 Knockout A-549 Cell Line | EDJ-KQ61758 | Human | 2524 | Details Get a Quote |
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Frequently Asked Questions About galactoside 2-alpha-L-fucosyltransferase activity
What is galactoside 2-alpha-L-fucosyltransferase activity?
It is the enzyme activity defined by GO:0008107 that transfers L-fucose from GDP-L-fucose to a terminal beta-D-galactosyl acceptor, forming an alpha(1,2)-fucosyl linkage and releasing GDP.
What genes encode galactoside 2-alpha-L-fucosyltransferase activity?
The H gene (FUT1) and the secretor-type gene FUT2 encode enzymes with this activity in humans.
What reaction does GO:0008107 catalyze?
The reaction is GDP-L-fucose + beta-D-galactosyl-R = GDP + alpha-L-fucosyl-(1,2)-beta-D-galactosyl-R.
Where is galactoside 2-alpha-L-fucosyltransferase activity found in cells?
The enzyme is a Golgi-resident glycosyltransferase, so activity is associated with the Golgi apparatus and its glycan products are displayed on cell surfaces and in secretions.
What is the H blood group antigen and how is it related to GO:0008107?
The H blood group antigen is the product of alpha(1,2)-fucosylation, and expression of the cloned cDNA with this activity can form the H antigen.
Is galactoside 2-alpha-L-fucosyltransferase activity conserved in plants?
Yes, Arabidopsis thaliana alpha1,2-L-fucosyltransferase catalyzes transfer of L-galactose to xyloglucan oligosaccharides, showing conservation of the alpha(1,2)-linkage chemistry.
How is galactoside 2-alpha-L-fucosyltransferase activity measured?
It is measured using enzyme assays with GDP-L-fucose and beta-D-galactoside acceptors, often combined with lectin staining or glycan profiling to detect H antigen and fucosylated products.
What diseases are linked to alpha(1,2)-fucosylation?
The activity is linked to blood group and transfusion biology, mucosal glycan phenotypes, and fucosylation-dependent hyperproliferative skin disease mechanisms.
Can CRISPR be used to study galactoside 2-alpha-L-fucosyltransferase activity?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models can test the causal role of FUT1, FUT2, and related genes in glycan phenotypes and disease.
What is the difference between secretor-type and H-gene-encoded alpha(1,2)-fucosyltransferase?
Secretor-type activity is encoded by FUT2 and modifies secreted glycans, while the H gene (FUT1) encodes an enzyme that forms the H antigen; both catalyze the same alpha(1,2)-fucosyl transfer reaction.
Conclusion
GO:0008107 galactoside 2-alpha-L-fucosyltransferase activity is a well-defined molecular function that installs terminal alpha(1,2)-linked fucose onto galactose-containing acceptors, forming the H blood group antigen and modifying epithelial and secreted glycoconjugates. Its biochemistry, gene structure, and tissue distribution have been characterized in human gastric mucosa, respiratory epithelium, and cervical epithelium, and the activity is conserved in plants. Because alpha(1,2)-fucosylation influences blood group serology, mucosal biology, and fucosylation-dependent disease mechanisms, the function is a valuable target for CRISPR-based causal studies and glycoengineering.
References
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- 2. Masutani H et al.. 1995. Purification and characterization of secretory-type GDP-L-fucose: beta-D-galactoside 2-alpha-L-fucosyltransferase from human gastric mucosa.. J Biochem 118(3):541-5 PMID: 8690714
- 3. Larsen RD et al.. 1990. Molecular cloning, sequence, and expression of a human GDP-L-fucose:beta-D-galactoside 2-alpha-L-fucosyltransferase cDNA that can form the H blood group antigen.. Proc Natl Acad Sci U S A 87(17):6674-8 PMID: 2118655
- 4. Li X et al.. 2025. FUT11-Driven fucosylation coordinates K63 ubiquitination of keratin 17 to sustain psoriatic keratinocytes hyperproliferation.. Cell Commun Signal 23(1):456 PMID: 41126226
- 5. Koda Y et al.. 1997. Structure and expression of the gene encoding secretor-type galactoside 2-alpha-L-fucosyltransferase (FUT2).. Eur J Biochem 246(3):750-5 PMID: 9219535
- 6. Ohashi H et al.. 2019. Arabidopsis thaliana α1,2-l-fucosyltransferase catalyzes the transfer of l-galactose to xyloglucan oligosaccharides.. FEBS Lett 593(2):187-194 PMID: 30478825
- 7. Scudder PR et al.. 1981. Glycosyltransferases of the human cervical epithelium. I. Characterization of a beta-galactoside alpha-2-L-fucosyltransferase and the identification of a beta-N-acetylglucosaminide alpha-3-L-fucosyltransferase.. Biochim Biophys Acta 660(1):128-35 PMID: 6168291
- 8. Rajan VP et al.. 1989. A cloned human DNA restriction fragment determines expression of a GDP-L-fucose: beta-D-galactoside 2-alpha-L-fucosyltransferase in transfected cells. Evidence for isolation and transfer of the human H blood group locus.. J Biol Chem 264(19):11158-67 PMID: 2738063
