GO:0050004 isoflavone 7-O-glucosyltransferase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0050004 describes the enzymatic activity that transfers glucose from UDP-glucose to the 7-hydroxyl group of an isoflavone, producing an isoflavone 7-O-beta-D-glucoside and UDP.
• The reaction is a central step in isoflavonoid biosynthesis, converting aglycones such as daidzein and genistein into their more stable and soluble 7-O-glucosides.
• The founding enzyme for this activity was purified and cloned from soybean (Glycine max) seedling roots, establishing the biochemical and phylogenetic basis of the family.
• Isoflavone 7-O-glucosides are often further modified by malonylation, a reaction catalyzed by a distinct BAHD acyltransferase, linking GO:0050004 to downstream storage and transport pathways.
• Transcriptome and metabolome studies in soybean and other legumes repeatedly identify isoflavone 7-O-glucosyltransferase genes as key regulators of isoflavone accumulation under developmental and environmental cues.
• Heterologous expression in yeast demonstrates that isoflavone 7-O-glucosyltransferase activity can be reconstituted in a microbial chassis for de novo biosynthesis of bioactive isoflavonoid glucosides such as calycosin-7-glucoside.
Description
Isoflavone 7-O-glucosyltransferase activity (GO:0050004) is a molecular function defined by the transfer of glucose from UDP-glucose to the 7-hydroxyl position of an isoflavone acceptor, yielding UDP and an isoflavone 7-O-beta-D-glucoside. This glycosylation step is a hallmark of isoflavonoid metabolism in legumes and is responsible for converting hydrophobic aglycones into more water-soluble, chemically stable, and biologically distinct glucosides. Because isoflavonoids such as daidzein and genistein are associated with plant defense and nutritional quality, the enzyme activity encoded by GO:0050004 sits at the interface of plant specialized metabolism and crop improvement. Researchers study GO:0050004 to understand how plants allocate isoflavone precursors between aglycone pools and conjugated storage forms, and to engineer microbial or plant systems that produce specific isoflavonoid glucosides. The activity was first characterized biochemically in soybean roots, where a UDP-glucose:isoflavone 7-O-glucosyltransferase was purified and its corresponding cDNA cloned, providing a reference sequence and mechanistic framework for the family. Subsequent work has shown that the 7-O-glucoside products can be further acylated, for example by an isoflavone 7-O-glucoside-6''-O-malonyltransferase, connecting GO:0050004 to a broader metabolic grid. From a practical standpoint, GO:0050004 is relevant to legume nutritional evaluation, germination studies, and synthetic biology efforts aimed at producing bioactive isoflavonoid glycosides in heterologous hosts. Transcriptome-metabolome integration in soybean has highlighted isoflavone biosynthetic regulators, including glycosyltransferases, as targets for enhancing nutritional quality. This article summarizes the definition, mechanism, key genes, disease-related biology, and experimental methods associated with GO:0050004, with all factual statements supported by the cited literature.
isoflavone 7-O-glucosyltransferase activity At A Glance
| GO ID | GO:0050004 |
|---|---|
| GO term | isoflavone 7-O-glucosyltransferase activity |
| Ontology | molecular_function |
| Synonym | UDPglucose:isoflavone 7-O-beta-D-glucosyltransferase activity; UDP-glucose:isoflavone 7-O-beta-D-glucosyltransferase activity; UDPglucose-flavonoid 7-O-glucosyltransferase activity; uridine diphosphoglucose-isoflavone 7-O-glucosyltransferase activity |
| Major function | Transfer of glucose from UDP-glucose to the 7-hydroxyl group of an isoflavone, producing an isoflavone 7-O-beta-D-glucoside and UDP |
| Reaction | UDP-glucose + isoflavone = UDP + isoflavone 7-O-beta-D-glucoside |
| Substrate class | Isoflavones such as daidzein and genistein, with UDP-glucose as the sugar donor |
| Product class | Isoflavone 7-O-beta-D-glucosides, which can be further malonylated |
| Representative enzyme | Soybean UDP-glucose:isoflavone 7-O-glucosyltransferase purified and cloned from roots |
What Is GO:0050004?
GO:0050004, isoflavone 7-O-glucosyltransferase activity, is a molecular function that catalyzes the reaction UDP-glucose + isoflavone = UDP + isoflavone 7-O-beta-D-glucoside. In other words, the enzyme uses UDP-glucose as the glucose donor and attaches that glucose to the 7-hydroxyl group of an isoflavone acceptor, forming a 7-O-beta-D-glucoside and releasing UDP. The activity is also known by synonyms such as UDPglucose:isoflavone 7-O-beta-D-glucosyltransferase activity and uridine diphosphoglucose-isoflavone 7-O-glucosyltransferase activity. It belongs to the molecular_function aspect of the Gene Ontology and is distinct from other flavonoid glycosyltransferase activities that act on different acceptor positions or substrates.
Why Is isoflavone 7-O-glucosyltransferase activity Important in Cell Biology?
GO:0050004 is important because it controls a committed glycosylation step that determines the fate, solubility, stability, and biological activity of isoflavonoids in legumes and in engineered systems. By converting aglycones into 7-O-glucosides, the enzyme influences the pool of defense-related phytoalexins and the nutritional profile of soybean and related crops. The activity is also a target for synthetic biology, as demonstrated by the de novo biosynthesis of calycosin-7-glucoside in yeast, where expression of an isoflavone 7-O-glucosyltransferase is required to produce the final glycosylated product. Understanding GO:0050004 therefore supports both fundamental plant biochemistry and applied efforts in crop quality improvement and microbial production of bioactive compounds.
• Defines a key glycosylation step in isoflavonoid biosynthesis, converting aglycones into 7-O-glucosides.
• Influences the accumulation of isoflavone glucosides that serve as storage and transport forms in legumes.
• Connects to downstream malonylation by isoflavone 7-O-glucoside-6''-O-malonyltransferase, expanding the metabolic grid.
• Contributes to plant defense-related isoflavonoid and pterocarpan phytoalexin pathways in legumes such as chickpea.
• Is relevant to soybean nutritional quality, as indicated by transcriptome and metabolome studies of germinated seeds.
• Enables synthetic biology production of bioactive isoflavonoid glucosides such as calycosin-7-glucoside in yeast.
• Provides a biochemical marker for elicitor-induced metabolic changes in legume cell cultures.
• Links to cGMP-mediated regulation of the flavonoid biosynthetic pathway in soybean.
• Supports research on isoflavone partitioning between aglycone and conjugated pools during development and stress.
• Offers a target for engineering improved isoflavonoid content and composition in crops and microbial chassis.
What Happens During isoflavone 7-O-glucosyltransferase activity?
Substrate recognition and binding
In simple terms: The enzyme first grabs the isoflavone and the glucose donor so they are positioned correctly.
The reaction begins when the enzyme binds an isoflavone acceptor, such as daidzein or genistein, and the sugar donor UDP-glucose. The soybean enzyme was purified on the basis of its ability to catalyze this transfer, and its cloning confirmed that it belongs to the UDP-glycosyltransferase family. Substrate specificity studies of the purified enzyme established that it acts on isoflavones with a free 7-hydroxyl group, distinguishing GO:0050004 from glycosyltransferases that modify other positions.
Glucose transfer and product formation
In simple terms: The enzyme moves glucose from UDP-glucose onto the isoflavone, making a glucoside and leaving UDP behind.
During catalysis, the glucose moiety of UDP-glucose is transferred to the 7-hydroxyl oxygen of the isoflavone, forming an isoflavone 7-O-beta-D-glucoside and releasing UDP. This is the defining chemical transformation of GO:0050004. The product retains the beta-D-glucosidic linkage specified in the GO definition, and the reaction is reversible in principle but is driven in vivo by metabolic flux toward conjugated isoflavonoids.
Downstream conversion of the 7-O-glucoside
In simple terms: The glucoside made by this enzyme can be further decorated, for example by adding a malonyl group.
Isoflavone 7-O-glucosides produced by GO:0050004 are not necessarily end products. A soybean BAHD acyltransferase, isoflavone 7-O-glucoside-6''-O-malonyltransferase, catalyzes the addition of a malonyl group to the glucose moiety, generating malonylated isoflavone glucosides. This downstream step links GO:0050004 to a larger network of isoflavonoid conjugation, storage, and transport, and it explains why 7-O-glucosides are often intermediates rather than terminal metabolites.
Role in the isoflavonoid pathway
In simple terms: This activity is one step in the broader assembly line that makes legume isoflavonoids.
GO:0050004 operates within the isoflavonoid branch of flavonoid metabolism. In soybean, the flavonoid pathway is transcriptionally regulated, and cGMP acts as a common regulator for the transcriptional activation of flavonoid biosynthetic genes. A cis-element responsible for cGMP responsiveness was identified in the promoter of the soybean chalcone synthase gene, providing a mechanistic link between upstream signaling and downstream isoflavonoid enzymes such as the 7-O-glucosyltransferase. In chickpea cell cultures, elicitor-induced metabolic changes involve enzyme activities of isoflavone and pterocarpan phytoalexin biosynthesis, indicating that 7-O-glucosylation participates in defense-related flux.
Reconstitution in heterologous systems
In simple terms: Scientists can put this enzyme into yeast to make isoflavonoid glucosides from scratch.
The activity can be reconstituted in microbial hosts. De novo biosynthesis of the Astragalus bioactive isoflavonoid calycosin-7-glucoside in yeast required expression of an isoflavone 7-O-glucosyltransferase, demonstrating that GO:0050004 is a functional and portable module for synthetic biology. Such reconstitution experiments help define the minimal set of enzymes needed to produce specific isoflavonoid glucosides and provide a platform for testing enzyme variants and pathway bottlenecks.
Key Genes Involved in GO:0050004 isoflavone 7-O-glucosyltransferase activity
The following genes and proteins are experimentally linked to isoflavone 7-O-glucosyltransferase activity (GO:0050004) or to the surrounding isoflavonoid pathway in legumes and heterologous systems.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GmIF7GT (soybean UDP-glucose:isoflavone 7-O-glucosyltransferase) | Catalyzes transfer of glucose from UDP-glucose to the 7-hydroxyl of isoflavones | Founding enzyme purified and cloned from soybean seedling roots; reference for GO:0050004 |
| GmIF7MaT (isoflavone 7-O-glucoside-6''-O-malonyltransferase) | Malonylates isoflavone 7-O-glucosides produced by GO:0050004 | Defines downstream modification of 7-O-glucoside products in soybean |
| CHS (chalcone synthase) | Early flavonoid pathway enzyme upstream of isoflavonoid biosynthesis | Promoter contains a cGMP-responsive cis-element linking signaling to isoflavonoid flux |
| Flavonoid pathway transcriptional regulators | Control expression of flavonoid and isoflavonoid biosynthetic genes | cGMP acts as a common regulator of flavonoid pathway transcriptional activation in soybean |
| Isoflavone biosynthetic regulators identified by transcriptome-metabolome integration | Modulate isoflavone accumulation in soybean | Key regulators of isoflavone biosynthesis for enhanced nutritional quality |
| Isoflavonoid pathway enzymes in chickpea | Participate in isoflavone and pterocarpan phytoalexin biosynthesis | Elicitor-induced enzyme activity changes in resistant and susceptible cultivars |
| Heterologous yeast pathway genes for calycosin-7-glucoside | Reconstitute isoflavonoid glucoside biosynthesis | Demonstrate de novo production requiring isoflavone 7-O-glucosyltransferase activity |
| Soybean germination-associated isoflavone genes | Contribute to isoflavone changes during germination | Transcriptome analyses of short-time germinated seeds |
| UDP-glucose supply genes | Provide the sugar donor for GO:0050004 | UDP-glucose availability influences glycosylation flux |
| Isoflavone aglycone biosynthetic enzymes | Produce daidzein and genistein substrates | Substrate supply for 7-O-glucosylation |
| BAHD acyltransferase family members | Acylate glucosides and other acceptors | Related to downstream modification of isoflavone 7-O-glucosides |
| cGMP signaling components | Regulate flavonoid pathway transcription | Link upstream signals to isoflavonoid enzyme expression |
| Soybean isoflavone quantitative trait loci candidates | Associate with isoflavone content variation | Relevant to nutritional quality improvement |
| Legume phytoalexin pathway enzymes | Produce defense-related isoflavonoids and pterocarpans | Studied in chickpea cultivars differing in resistance |
| Microbial pathway enzymes for isoflavonoid production | Support de novo biosynthesis in yeast | Used to test GO:0050004 in a heterologous chassis |
| Soybean seed nutritional quality genes | Influence isoflavone and other seed metabolites | Identified through germination and transcriptome studies |
How Is isoflavone 7-O-glucosyltransferase activity Regulated?
Isoflavone 7-O-glucosyltransferase activity is regulated at multiple levels. Transcriptionally, the flavonoid biosynthetic pathway in soybean is activated by cGMP, which acts as a common regulator for the transcriptional activation of flavonoid biosynthetic genes. A cis-element responsible for cGMP responsiveness was identified in the promoter of the soybean chalcone synthase gene, providing a direct link between cyclic nucleotide signaling and flavonoid pathway gene expression. In chickpea cell cultures, elicitor treatment induces metabolic changes and alters enzyme activities involved in isoflavone and pterocarpan phytoalexin biosynthesis, indicating that biotic stress signals modulate flux through isoflavonoid pathways that include 7-O-glucosylation. At the metabolic level, substrate availability of UDP-glucose and isoflavone aglycones, as well as downstream malonylation by isoflavone 7-O-glucoside-6''-O-malonyltransferase, can influence the net accumulation of 7-O-glucoside products. Transcriptome-metabolome integration in soybean has further identified regulators associated with isoflavone biosynthesis, suggesting that developmental and environmental cues converge on the expression of isoflavonoid glycosyltransferases.
isoflavone 7-O-glucosyltransferase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GmIF7GT | Isoflavonoid phytoalexin biosynthesis and legume defense | Soybean root or cell culture with elicitor treatment |
| GmIF7MaT | Downstream modification of isoflavone 7-O-glucosides | Soybean cell-free assays and heterologous expression |
| CHS | Flavonoid pathway regulation via cGMP-responsive promoter | Soybean promoter-reporter assays |
| Isoflavone pathway regulators | Soybean nutritional quality and isoflavone accumulation | Germinated seed transcriptome-metabolome studies |
| Heterologous yeast pathway | Bioactive isoflavonoid glucoside production | Engineered yeast strains for calycosin-7-glucoside |
Isoflavonoids, phytoalexins, and plant defense
GO:0050004 contributes to the biosynthesis of isoflavone 7-O-glucosides, which are part of the broader isoflavonoid and pterocarpan phytoalexin pathways in legumes. In chickpea cell cultures, elicitor-induced metabolic changes involve enzyme activities of isoflavone and pterocarpan phytoalexin biosynthesis, and these responses differ between cultivars resistant and susceptible to Ascochyta rabiei. This places 7-O-glucosylation within a defense-related metabolic context relevant to crop disease resistance.
Nutritional quality and human health relevance of isoflavonoids
Isoflavonoids such as daidzein and genistein and their glucosides are associated with the nutritional quality of soybean and other legumes. Transcriptome and metabolome analyses of short-time germinated soybean seeds have been used to evaluate nutritional changes and identify genes linked to isoflavone metabolism. Integration of transcriptome and metabolome data has further revealed key regulators of isoflavone biosynthesis in soybean for enhanced nutritional quality, highlighting glycosyltransferases as part of the trait network. While these studies focus on plant nutrition rather than human disease, they provide the metabolic context in which isoflavonoid glucosides are consumed and studied.
Synthetic biology and bioactive glucoside production
The relevance of GO:0050004 extends to the production of bioactive isoflavonoid glucosides. De novo biosynthesis of the Astragalus bioactive isoflavonoid calycosin-7-glucoside in yeast required an isoflavone 7-O-glucosyltransferase, demonstrating that this activity can be used to generate pharmacologically interesting glycosides in a heterologous host. Such systems enable controlled production and testing of isoflavonoid glucosides, supporting research into their biological activities.
From isoflavone 7-O-glucosyltransferase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a candidate isoflavone 7-O-glucosyltransferase reduce 7-O-glucoside levels? | CRISPR knockout in soybean or legume cell culture |
| Which amino acid residues determine substrate specificity for isoflavones? | Point-mutation knock-in of the glycosyltransferase gene followed by enzyme assays |
| Can a tagged enzyme be used to track localization and complex formation? | Tagged knock-in of the endogenous locus |
| Does overexpression increase isoflavonoid glucoside accumulation? | Overexpression in soybean hairy roots or heterologous yeast |
| Can the pathway be reconstituted from scratch in a microbe? | Yeast chassis expressing the full isoflavonoid pathway including the 7-O-glucosyltransferase |
| How does elicitor treatment alter 7-O-glucosyltransferase activity? | Legume cell cultures with elicitor treatment and enzyme activity assays |
How to Study the isoflavone 7-O-glucosyltransferase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Enzyme activity assay with UDP-glucose and isoflavone acceptor | Formation of isoflavone 7-O-glucoside and UDP release | Functional assignment of candidate glycosyltransferases |
| RNA-seq | Transcript levels of isoflavonoid pathway genes | Identifying glycosyltransferase candidates in germinating seeds or tissues |
| Metabolomics | Isoflavone aglycone and glucoside profiles | Linking gene expression to metabolite accumulation |
| Heterologous yeast expression | Reconstitution of isoflavonoid glucoside biosynthesis | De novo production of calycosin-7-glucoside and related compounds |
| Promoter-reporter assay | Transcriptional activity of pathway gene promoters | Testing cGMP-responsive cis-elements |
| Elicitor treatment of cell cultures | Changes in isoflavonoid enzyme activities | Studying defense-related phytoalexin biosynthesis |
| Phylogenetic analysis | Evolutionary relationships among glycosyltransferases | Classifying the soybean 7-O-glucosyltransferase within the family |
| Malonyltransferase assay | Malonylation of isoflavone 7-O-glucosides | Characterizing downstream modification of GO:0050004 products |
Enzyme activity assays
Direct measurement of isoflavone 7-O-glucosyltransferase activity uses UDP-glucose and an isoflavone acceptor such as daidzein or genistein, followed by detection of the 7-O-glucoside product. This approach was used to purify and characterize the founding soybean enzyme, and it remains the gold standard for assigning GO:0050004 to a candidate protein. Activity assays can also be applied to elicitor-treated legume cell cultures to monitor changes in isoflavonoid pathway flux.
Transcriptomics and metabolomics
RNA-seq and metabolomics are widely used to link glycosyltransferase gene expression to isoflavonoid accumulation. Transcriptome analyses of short-time germinated soybean seeds have been combined with nutritional evaluation to identify genes associated with isoflavone changes. Transcriptome-metabolome integration has further revealed key regulators of isoflavone biosynthesis in soybean, providing candidate genes for functional testing.
Heterologous expression and synthetic biology
Expressing candidate glycosyltransferases in yeast or other heterologous hosts allows functional assignment and pathway reconstitution. De novo biosynthesis of calycosin-7-glucoside in yeast demonstrated that an isoflavone 7-O-glucosyltransferase is required for the final glycosylation step. Such platforms enable testing of enzyme variants, substrate specificity, and pathway bottlenecks in a controlled background.
Promoter and signaling analyses
Because isoflavonoid pathway genes are transcriptionally regulated, promoter-reporter assays and signaling studies help define upstream control of GO:0050004. A cGMP-responsive cis-element was identified in the soybean chalcone synthase promoter, and cGMP acts as a common regulator of flavonoid pathway transcriptional activation. These methods connect upstream signals to the expression of downstream enzymes such as isoflavone 7-O-glucosyltransferases.
How CRISPR Can Be Used to Study GO:0050004 isoflavone 7-O-glucosyltransferase activity
Knockout
CRISPR knockout of a candidate isoflavone 7-O-glucosyltransferase gene can test whether the encoded enzyme is responsible for 7-O-glucoside production in planta. Loss-of-function lines are expected to show reduced isoflavone 7-O-glucoside levels and altered isoflavonoid profiles, which can be measured by metabolomics and enzyme assays. Such experiments help distinguish the target glycosyltransferase from other family members with overlapping activities.
Point Mutation
Point mutations can be introduced into the catalytic or substrate-binding residues of the glycosyltransferase to dissect mechanism and specificity. Because the founding soybean enzyme was purified and cloned, its sequence provides a basis for selecting residues to mutate and then testing the variants in enzyme assays. Point-mutation models are useful for separating catalytic activity from substrate recognition and for engineering altered acceptor preference.
Knock-in
Knock-in of a tag or reporter at the endogenous locus allows tracking of enzyme expression, localization, and interaction partners without altering the native regulatory context. Tagged knock-in lines can be used in immunoprecipitation and imaging experiments to study where and when the isoflavone 7-O-glucosyltransferase acts. This approach complements overexpression, which may cause artifacts due to non-physiological expression levels.
Overexpression
Overexpression of an isoflavone 7-O-glucosyltransferase can increase flux toward 7-O-glucoside products and is a common strategy in both plant and microbial systems. In yeast, expression of the glycosyltransferase together with upstream pathway enzymes enabled de novo biosynthesis of calycosin-7-glucoside. In plants, overexpression can be used to test whether the enzyme is limiting for isoflavonoid glucoside accumulation.
How EDITGENE Supports isoflavone 7-O-glucosyltransferase activity Research
Researchers studying isoflavone 7-O-glucosyltransferase activity-related genes often need to determine whether a candidate gene is causally involved in isoflavonoid glucoside production, how its catalytic residues control substrate specificity, and whether its expression level or localization affects pathway flux. Answering these questions requires precise genetic models, including knockouts, point mutants, knock-ins, and overexpression lines, as well as unbiased screening and bioinformatic analysis of pathway genes.
Contact EDITGENE today to design your custom CRISPR model for isoflavone 7-O-glucosyltransferase activity research.
Frequently Asked Questions About isoflavone 7-O-glucosyltransferase activity
What is isoflavone 7-O-glucosyltransferase activity?
It is a molecular function defined by GO:0050004 that catalyzes the transfer of glucose from UDP-glucose to the 7-hydroxyl group of an isoflavone, producing an isoflavone 7-O-beta-D-glucoside and UDP.
What is the GO ID for isoflavone 7-O-glucosyltransferase activity?
The Gene Ontology identifier is GO:0050004, and the term belongs to the molecular_function aspect.
What reaction does GO:0050004 catalyze?
The reaction is UDP-glucose + isoflavone = UDP + isoflavone 7-O-beta-D-glucoside, as stated in the QuickGO definition and supported by biochemical characterization of the soybean enzyme.
Which organism was the founding isoflavone 7-O-glucosyltransferase cloned from?
The enzyme was purified and cloned from the roots of soybean (Glycine max) seedlings, providing the reference sequence for the activity.
What genes are involved in isoflavone 7-O-glucosyltransferase activity?
Key genes include the soybean UDP-glucose:isoflavone 7-O-glucosyltransferase itself, downstream isoflavone 7-O-glucoside-6''-O-malonyltransferase, upstream flavonoid pathway genes such as chalcone synthase, and pathway regulators identified by transcriptome-metabolome integration.
How is isoflavone 7-O-glucosyltransferase activity regulated?
It is regulated transcriptionally by signaling pathways such as cGMP-mediated activation of flavonoid biosynthetic genes, and metabolically by substrate availability and downstream malonylation.
What is the product of isoflavone 7-O-glucosyltransferase activity?
The product is an isoflavone 7-O-beta-D-glucoside, which can be further modified, for example by malonylation, in legumes such as soybean.
Can isoflavone 7-O-glucosyltransferase activity be reconstituted in yeast?
Yes, de novo biosynthesis of the Astragalus bioactive isoflavonoid calycosin-7-glucoside in yeast required an isoflavone 7-O-glucosyltransferase, demonstrating functional reconstitution.
Why is isoflavone 7-O-glucosyltransferase activity important for soybean nutrition?
It contributes to the conversion of isoflavone aglycones into glucosides, which affects the isoflavonoid profile of soybean seeds and is relevant to nutritional quality studies.
How do researchers study isoflavone 7-O-glucosyltransferase activity?
Common methods include enzyme activity assays with UDP-glucose and isoflavone acceptors, RNA-seq and metabolomics, heterologous expression in yeast, promoter-reporter assays, and elicitor treatment of legume cell cultures.
Conclusion
GO:0050004, isoflavone 7-O-glucosyltransferase activity, defines a specific glycosylation reaction that converts isoflavone aglycones into 7-O-beta-D-glucosides using UDP-glucose as the donor. This activity is central to isoflavonoid metabolism in legumes, connects to downstream modifications such as malonylation, and is regulated by signaling pathways including cGMP-mediated transcriptional activation. Its functional portability has been demonstrated by reconstitution in yeast for the production of bioactive isoflavonoid glucosides. For researchers, GO:0050004 provides a clear biochemical and genetic target for studying isoflavonoid biosynthesis, plant defense, nutritional quality, and synthetic biology. Combining enzyme assays, transcriptomics, metabolomics, and CRISPR-based genetic models enables precise dissection of the genes and mechanisms that control this activity and its downstream products.
References
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- 2. Suzuki H et al.. 2007. cDNA cloning of a BAHD acyltransferase from soybean (Glycine max): isoflavone 7-O-glucoside-6''-O-malonyltransferase.. Phytochemistry 68(15):2035-42 PMID: 17602715
- 3. Chen C et al.. 2025. De novo biosynthesis of Astragalus bioactive isoflavonoid calycosin-7-glucoside in yeast.. Biodes Res 7(4):100058 PMID: 42038705
- 4. Hu W et al.. 2021. Nutritional evaluation and transcriptome analyses of short-time germinated seeds in soybean (Glycine max L. Merri.).. Sci Rep 11(1):22714 PMID: 34811436
- 5. Abu Zahra H et al.. 2014. A cis-element responsible for cGMP in the promoter of the soybean chalcone synthase gene.. Plant Physiol Biochem 74:92-8 PMID: 24286716
- 6. Wang Y et al.. 2026. Transcriptome-Metabolome Integration Reveals Key Regulators of Isoflavone Biosynthesis in Soybean for Enhanced Nutritional Quality.. J Agric Food Chem 74(25):20089-20100 PMID: 42303412
- 7. Suita K et al.. 2009. Cyclic GMP acts as a common regulator for the transcriptional activation of the flavonoid biosynthetic pathway in soybean.. Planta 229(2):403-13 PMID: 18987879
- 8. Daniel S et al.. 1990. Elicitor-induced metabolic changes in cell cultures of chickpea (Cicer arietinum L.) cultivars resistant and susceptible to Ascochyta rabiei : I. Investigations of enzyme activities involved in isoflavone and pterocarpan phytoalexin biosynthesis.. Planta 182(2):270-8 PMID: 24197106
