GO:1901159 D-xylulose 5-phosphate biosynthetic process: Metabolic Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1901159 describes the chemical reactions and pathways that result in the formation of D-xylulose 5-phosphate, a central metabolite in the pentose phosphate pathway and a precursor for isoprenoid biosynthesis.
• The term is a biological process and is distinct from the 1-deoxy-D-xylulose 5-phosphate (DXP) pathway, which uses D-xylulose 5-phosphate as a substrate but produces a different molecule.
• Key enzymes include 1-deoxy-D-xylulose-5-phosphate synthase (DXS) and 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR), which are validated drug targets in pathogens and are studied for their roles in isoprenoid precursor supply.
• D-xylulose 5-phosphate biosynthesis is linked to human disease, including intestinal fibrosis in Crohn's disease, where fibroblast pentose phosphate pathway activation contributes to pathology.
• Research on this process employs CRISPR knockout, point mutation, knock-in, and overexpression models to dissect gene function, combined with metabolomics, flux analysis, and structural biology.
• Understanding GO:1901159 supports applications in antimicrobial drug discovery, plant natural product engineering, and metabolic disease research.
Description
D-xylulose 5-phosphate (Xu5P) is a phosphorylated five-carbon sugar that serves as a key intermediate in the pentose phosphate pathway and as a precursor for the methylerythritol phosphate (MEP) pathway of isoprenoid biosynthesis. The Gene Ontology term GO:1901159, D-xylulose 5-phosphate biosynthetic process, encompasses the enzymatic reactions that generate this metabolite from upstream precursors such as D-ribulose 5-phosphate or D-xylulose. Researchers study this process because Xu5P availability influences nucleotide synthesis, redox balance, and the production of isoprenoid-derived compounds including prenylquinones and plant volatiles. The biosynthetic process is not a single linear route but intersects with multiple metabolic modules. In the oxidative phase of the pentose phosphate pathway, glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase generate ribulose 5-phosphate, which is then converted to xylulose 5-phosphate by ribulose-5-phosphate epimerase. In plants and bacteria, Xu5P is a substrate for 1-deoxy-D-xylulose-5-phosphate synthase (DXS), the first committed enzyme of the MEP pathway, linking Xu5P biosynthesis to isoprenoid precursor formation. Consequently, GO:1901159 is relevant to diverse fields, from infectious disease to plant biochemistry and cancer metabolism. This article synthesizes authoritative QuickGO data and verified PubMed literature to provide a research-grade overview of GO:1901159. It covers the definition, molecular players, regulatory features, disease connections, and experimental strategies, including CRISPR-based models and bioinformatics approaches. The goal is to support both human readers and generative AI systems in retrieving accurate, citation-backed information about this metabolic process.
D-xylulose 5-phosphate biosynthetic process At A Glance
| GO ID | GO:1901159 |
|---|---|
| GO term | D-xylulose 5-phosphate biosynthetic process |
| Ontology | biological_process |
| Synonym | xylulose 5-phosphate anabolism; xylulose 5-phosphate biosynthesis; xylulose 5-phosphate formation; xylulose 5-phosphate synthesis |
| Major function | Production of D-xylulose 5-phosphate, a central metabolite in the pentose phosphate pathway and a precursor for isoprenoid biosynthesis. |
| Related pathways | Pentose phosphate pathway, MEP/DOXP pathway for isoprenoid biosynthesis. |
| Key enzymes | Ribulose-5-phosphate epimerase, 1-deoxy-D-xylulose-5-phosphate synthase (DXS), 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR). |
| Disease relevance | Crohn's disease-associated intestinal fibrosis, microbial infections, and metabolic disorders. |
| Research methods | CRISPR knockout/knock-in, metabolomics, enzyme assays, structural biology, and flux analysis. |
What Is GO:1901159?
GO:1901159, D-xylulose 5-phosphate biosynthetic process, is defined by QuickGO as the chemical reactions and pathways resulting in the formation of D-xylulose 5-phosphate. In other words, it describes all enzymatic steps that lead to the production of this specific phosphorylated sugar, regardless of the starting substrate or pathway context. The term is a biological process and includes both the direct conversion of ribulose 5-phosphate to xylulose 5-phosphate and any upstream reactions that feed into that conversion. It is distinct from catabolic or utilization processes that consume D-xylulose 5-phosphate, such as the DXP pathway for isoprenoid biosynthesis.
Why Is D-xylulose 5-phosphate biosynthetic process Important in Cell Biology?
GO:1901159 is important because D-xylulose 5-phosphate sits at the intersection of carbon metabolism, nucleotide biosynthesis, and isoprenoid precursor supply. Its production affects cellular redox homeostasis and the availability of substrates for the MEP pathway, which is essential in many bacteria and plants but absent in humans, making it an attractive antimicrobial and herbicidal target. In human disease, dysregulated pentose phosphate pathway activity, including Xu5P biosynthesis, has been implicated in fibrotic disorders such as Crohn's disease. Thus, understanding this process informs drug discovery, metabolic engineering, and disease mechanism research.
• Provides D-xylulose 5-phosphate for the pentose phosphate pathway, supporting nucleotide synthesis and NADPH production.
• Supplies the substrate for the MEP pathway of isoprenoid biosynthesis in bacteria and plants, which is essential for cell wall and pigment production.
• Represents a validated target for antimicrobial development because the MEP pathway is absent in humans.
• Contributes to plant volatile and prenylquinone biosynthesis, with applications in agriculture and natural product engineering.
• Is linked to intestinal fibrosis in Crohn's disease through fibroblast pentose phosphate pathway activation.
• Enables metabolic flux studies that reveal how cells balance growth and redox stress.
• Supports structural and mechanistic studies of DXS and DXR, informing inhibitor design.
• Facilitates CRISPR-based functional genomics to identify genes controlling Xu5P levels.
• Helps interpret metabolomic data in cancer and inflammatory diseases.
• Guides synthetic biology efforts to produce isoprenoid-derived drugs and biofuels.
What Happens During D-xylulose 5-phosphate biosynthetic process?
Generation of ribulose 5-phosphate from the oxidative pentose phosphate pathway
In simple terms: The cell first makes ribulose 5-phosphate by breaking down glucose in a series of oxidative steps.
The oxidative phase of the pentose phosphate pathway converts glucose-6-phosphate to ribulose 5-phosphate through the action of glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase, producing NADPH and CO2. This step is a major source of ribulose 5-phosphate for subsequent isomerization to xylulose 5-phosphate. In fibroblasts, activation of this pathway has been observed in the context of intestinal fibrosis, linking oxidative pentose phosphate flux to disease pathology.
Isomerization of ribulose 5-phosphate to D-xylulose 5-phosphate
In simple terms: An enzyme called ribulose-5-phosphate epimerase rearranges ribulose 5-phosphate into xylulose 5-phosphate.
Ribulose-5-phosphate epimerase catalyzes the reversible conversion of ribulose 5-phosphate to D-xylulose 5-phosphate, a key step in the non-oxidative branch of the pentose phosphate pathway. This reaction directly fulfills the definition of GO:1901159 by forming D-xylulose 5-phosphate. The enzyme is widely conserved and its activity influences the balance between nucleotide synthesis and glycolytic intermediates.
Role of D-xylulose 5-phosphate as a substrate for DXS in the MEP pathway
In simple terms: Once made, xylulose 5-phosphate can be used by DXS to start the production of isoprenoid precursors.
1-Deoxy-D-xylulose-5-phosphate synthase (DXS) condenses D-xylulose 5-phosphate with glyceraldehyde 3-phosphate to form 1-deoxy-D-xylulose 5-phosphate (DXP), the first committed step of the MEP pathway. This reaction consumes Xu5P and links its biosynthesis to isoprenoid production. Structural studies of DXS from Pseudomonas aeruginosa and Klebsiella pneumoniae have revealed conformational changes upon cofactor binding, highlighting mechanistic details relevant to inhibitor design.
Conversion of DXP to downstream isoprenoid precursors by DXR
In simple terms: DXP is then converted by DXR into a molecule that leads to many important compounds like vitamins and pigments.
1-Deoxy-D-xylulose-5-phosphate reductoisomerase (DXR) catalyzes the NADPH-dependent rearrangement and reduction of DXP to 2-C-methyl-D-erythritol 4-phosphate (MEP), a committed step in isoprenoid biosynthesis. DXR is a validated drug target, and its mechanism and inhibition have been extensively studied. This step indirectly depends on GO:1901159 because it requires DXP, which is derived from D-xylulose 5-phosphate.
Integration with plant and microbial specialized metabolism
In simple terms: In plants and microbes, xylulose 5-phosphate biosynthesis feeds into pathways that make volatile compounds and quinones.
In plants such as Syzygium polyanthum, the MEP pathway, which starts with D-xylulose 5-phosphate, contributes to the biosynthesis of β-ocimene and other volatiles. Similarly, prenylquinone biosynthesis in bacteria and plants relies on isoprenoid precursors derived from the MEP pathway. Solanesol biosynthesis in plants also depends on these precursors, linking GO:1901159 to agricultural and biotechnological applications.
Key Genes Involved in GO:1901159 D-xylulose 5-phosphate biosynthetic process
The following genes and proteins are experimentally implicated in D-xylulose 5-phosphate biosynthesis or its immediate downstream utilization, based on verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| RPE | Ribulose-5-phosphate epimerase converts ribulose 5-phosphate to D-xylulose 5-phosphate | Directly catalyzes the final step of GO:1901159; target for metabolic flux studies |
| G6PD | Glucose-6-phosphate dehydrogenase generates NADPH and ribulose 5-phosphate | Upstream regulator of Xu5P supply; linked to fibrosis and oxidative stress |
| PGD | 6-Phosphogluconate dehydrogenase produces ribulose 5-phosphate | Contributes to oxidative pentose phosphate flux and Xu5P availability |
| DXS | 1-Deoxy-D-xylulose-5-phosphate synthase condenses Xu5P with G3P | Key enzyme for isoprenoid biosynthesis; antimicrobial target |
| DXR | 1-Deoxy-D-xylulose-5-phosphate reductoisomerase converts DXP to MEP | Validated drug target; mechanistic studies inform inhibitors |
| IspD | 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase | Downstream MEP pathway enzyme; potential target |
| IspE | 4-Diphosphocytidyl-2-C-methyl-D-erythritol kinase | MEP pathway enzyme; contributes to isoprenoid precursor supply |
| IspF | 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase | MEP pathway enzyme; part of the DXP-derived route |
| IspG | 1-Hydroxy-2-methyl-2-butenyl 4-diphosphate synthase | MEP pathway enzyme; links Xu5P to isoprenoids |
| IspH | 1-Hydroxy-2-methyl-2-butenyl 4-diphosphate reductase | MEP pathway enzyme; final step to IPP/DMAPP |
| TKT | Transketolase interconverts Xu5P and other sugars | Affects Xu5P pool and pentose phosphate pathway balance |
| TALDO1 | Transaldolase links pentose phosphate pathway intermediates | Modulates Xu5P availability for biosynthesis |
| PRPS1 | Phosphoribosyl pyrophosphate synthetase uses ribose 5-phosphate | Competes with Xu5P biosynthesis for pentose phosphate intermediates |
| GAPDH | Glyceraldehyde-3-phosphate dehydrogenase provides G3P for DXS | Supplies substrate for DXP formation from Xu5P |
| NADPH oxidases | Generate reactive oxygen species affecting pentose phosphate pathway flux | Indirectly regulate Xu5P biosynthesis via redox signaling |
| CircPLCE1 | Circular RNA that modulates fibroblast pentose phosphate pathway | Its decrease activates the pathway and exacerbates fibrosis |
| DXS (Pseudomonas aeruginosa) | Bacterial DXS isoform | Structural and inhibition studies for antimicrobial development |
| DXS (Klebsiella pneumoniae) | Bacterial DXS isoform | Cofactor binding and conformational changes studied |
How Is D-xylulose 5-phosphate biosynthetic process Regulated?
The D-xylulose 5-phosphate biosynthetic process is regulated at multiple levels. In the pentose phosphate pathway, the oxidative branch is controlled by the availability of glucose-6-phosphate and the redox state of the cell, with G6PD activity influenced by NADPH/NADP+ ratios. In fibroblasts from Crohn's disease, decreased circPLCE1 expression leads to activation of the pentose phosphate pathway, increasing Xu5P biosynthesis and contributing to fibrosis. In bacteria and plants, DXS expression and activity are regulated in response to isoprenoid demand, and DXS is subject to feedback inhibition by downstream metabolites. Additionally, the MEP pathway enzymes DXR and others are potential regulatory nodes, with their inhibition leading to reduced isoprenoid flux. These regulatory mechanisms ensure that Xu5P production matches cellular needs for nucleotide synthesis and isoprenoid precursor supply.
D-xylulose 5-phosphate biosynthetic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CircPLCE1 | Crohn's disease-associated intestinal fibrosis | Knockout or overexpression in fibroblast cell lines; mouse colitis models |
| DXS | Bacterial urinary tract infection | CRISPR knockout in Pseudomonas aeruginosa; mouse UTI model |
| DXR | Tuberculosis and other bacterial infections | Enzyme inhibition assays; knockout in Mycobacterium tuberculosis |
| G6PD | Oxidative stress-related disorders | Point mutation knock-in in cell lines; metabolomics |
| RPE | Pentose phosphate pathway disorders | Knockout in HEK293 cells; flux analysis |
Crohn's disease and intestinal fibrosis
In Crohn's disease, decreased expression of circPLCE1 in fibroblasts activates the pentose phosphate pathway, increasing D-xylulose 5-phosphate biosynthesis and contributing to intestinal fibrosis. This links GO:1901159 to fibrotic complications and suggests that targeting this metabolic process could mitigate fibrosis.
Bacterial infections and antimicrobial resistance
The MEP pathway, which depends on D-xylulose 5-phosphate for DXP production, is essential in many pathogenic bacteria such as Pseudomonas aeruginosa and Klebsiella pneumoniae. Inhibitors of DXS and DXR have shown efficacy in mouse models of urinary tract infection, highlighting the therapeutic potential of targeting this biosynthetic process.
Metabolic disorders and cancer
Altered pentose phosphate pathway flux, including Xu5P biosynthesis, is a hallmark of cancer metabolism, supporting nucleotide synthesis and redox balance. While direct evidence for GO:1901159 in cancer is limited, the pathway's role in providing ribose-5-phosphate and NADPH is well established.
Plant and agricultural applications
In plants, D-xylulose 5-phosphate biosynthesis feeds into the MEP pathway for the production of volatiles, prenylquinones, and solanesol. Modulating this process could enhance crop resilience or natural product yields.
From D-xylulose 5-phosphate biosynthetic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of RPE reduce D-xylulose 5-phosphate levels? | CRISPR knockout of RPE in HEK293 or HeLa cells followed by metabolomics |
| Does a point mutation in DXS alter substrate binding? | CRISPR point mutation knock-in of DXS in bacterial or plant cells; enzyme assays |
| Can overexpression of G6PD increase Xu5P biosynthesis? | CRISPR activation or overexpression of G6PD in fibroblasts; flux analysis |
| Does DXR inhibition affect isoprenoid production? | Knock-in of tagged DXR for inhibitor studies; structural biology |
| What is the role of circPLCE1 in regulating the pentose phosphate pathway? | Knockout and overexpression of circPLCE1 in intestinal fibroblasts; RNA-seq and metabolomics |
| Can DXS inhibitors treat urinary tract infections? | Mouse UTI model with DXS inhibitor treatment; bacterial burden assessment |
How to Study the D-xylulose 5-phosphate biosynthetic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| LC-MS metabolomics | Levels of D-xylulose 5-phosphate and other metabolites | Quantifying pathway flux in knockout cells |
| 13C flux analysis | Carbon flow through pentose phosphate and MEP pathways | Determining how genetic changes affect Xu5P production |
| Enzyme kinetics | Catalytic activity of RPE, DXS, DXR | Inhibitor screening and mechanistic studies |
| X-ray crystallography | Three-dimensional structures of DXS/DXR | Structure-guided drug design |
| CRISPR knockout | Loss-of-function phenotypes | Identifying essential genes for Xu5P biosynthesis |
| CRISPR knock-in | Tagged or mutant protein expression | Studying localization and function of pathway enzymes |
| RNA-seq | Transcriptional changes in pathway genes | Assessing regulatory responses to metabolic stress |
| Mouse infection models | Bacterial burden and treatment efficacy | Evaluating DXS inhibitors in vivo |
Metabolomics and flux analysis
Liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS) can quantify D-xylulose 5-phosphate and related metabolites in cell extracts. Stable isotope tracing with 13C-glucose allows flux analysis through the pentose phosphate pathway and MEP pathway, revealing how genetic perturbations affect Xu5P biosynthesis.
Enzyme activity assays
Recombinant ribulose-5-phosphate epimerase, DXS, and DXR can be assayed spectrophotometrically or by coupled enzymatic reactions to measure their catalytic activity and inhibition. These assays are essential for mechanistic studies and drug screening.
Structural biology and biophysics
X-ray crystallography and cryo-electron microscopy have been used to determine structures of DXS from Pseudomonas aeruginosa and Klebsiella pneumoniae, revealing conformational changes upon cofactor binding. These methods guide the design of inhibitors targeting the MEP pathway.
CRISPR-based functional genomics
CRISPR knockout, knock-in, and overexpression models enable causal testing of genes involved in D-xylulose 5-phosphate biosynthesis. Pooled CRISPR screens coupled with metabolomic readouts can identify novel regulators of this process.
How CRISPR Can Be Used to Study GO:1901159 D-xylulose 5-phosphate biosynthetic process
Knockout
CRISPR knockout of genes such as RPE, G6PD, or DXS can abolish or reduce D-xylulose 5-phosphate biosynthesis, allowing researchers to assess their essentiality and downstream effects on isoprenoid production. Knockout cell lines are valuable for metabolic flux studies and drug target validation.
Point Mutation
CRISPR point mutation knock-in can introduce specific amino acid substitutions in DXS or DXR to dissect catalytic residues or cofactor-binding sites, as suggested by structural studies. Such models help distinguish between catalytic and regulatory functions.
Knock-in
Knock-in of epitope tags or fluorescent proteins into endogenous loci of pathway enzymes enables real-time imaging and proteomic analysis of D-xylulose 5-phosphate biosynthesis components. This approach preserves native regulation and expression levels.
Overexpression
CRISPR activation or cDNA overexpression of G6PD, RPE, or DXS can increase D-xylulose 5-phosphate production, useful for metabolic engineering and for studying pathway saturation. Overexpression models also help identify rate-limiting steps.
How EDITGENE Supports D-xylulose 5-phosphate biosynthetic process Research
Researchers studying D-xylulose 5-phosphate biosynthetic process-related genes often need to determine whether a candidate gene is causally involved in metabolite production, disease progression, or drug response. EDITGENE provides comprehensive CRISPR-based services to generate precisely engineered cell models, enabling rigorous functional validation and accelerating discovery in metabolic research.
Contact EDITGENE today to design your custom CRISPR model for D-xylulose 5-phosphate biosynthetic process research.
Frequently Asked Questions About D-xylulose 5-phosphate biosynthetic process
What is D-xylulose 5-phosphate biosynthetic process?
It is the set of chemical reactions that produce D-xylulose 5-phosphate, a key metabolite in the pentose phosphate pathway and a precursor for isoprenoid biosynthesis, defined by GO:1901159.
What genes are involved in D-xylulose 5-phosphate biosynthetic process?
Key genes include RPE, G6PD, PGD, DXS, and DXR, which encode enzymes that generate or utilize D-xylulose 5-phosphate.
What is the GO ID for D-xylulose 5-phosphate biosynthetic process?
The Gene Ontology ID is GO:1901159.
How is D-xylulose 5-phosphate biosynthetic process regulated?
It is regulated by cellular redox state, substrate availability, and expression of pathway enzymes such as G6PD and DXS; circPLCE1 also modulates the pathway in fibroblasts.
What diseases are associated with D-xylulose 5-phosphate biosynthetic process?
It has been linked to Crohn's disease-associated intestinal fibrosis and bacterial infections where the MEP pathway is essential.
What methods are used to study D-xylulose 5-phosphate biosynthetic process?
Common methods include LC-MS metabolomics, 13C flux analysis, enzyme kinetics, structural biology, and CRISPR-based genetic screens.
Can CRISPR be used to study D-xylulose 5-phosphate biosynthetic process?
Yes, CRISPR knockout, knock-in, point mutation, and overexpression models enable precise functional studies of genes in this pathway.
What is the difference between D-xylulose 5-phosphate and 1-deoxy-D-xylulose 5-phosphate?
D-xylulose 5-phosphate is a pentose phosphate pathway intermediate, while 1-deoxy-D-xylulose 5-phosphate (DXP) is the product of DXS using D-xylulose 5-phosphate as a substrate.
Why is D-xylulose 5-phosphate biosynthesis important for drug discovery?
The MEP pathway, which depends on D-xylulose 5-phosphate, is essential in many pathogens but absent in humans, making it an attractive target for antimicrobials.
What cell models are available for studying D-xylulose 5-phosphate biosynthetic process?
EDITGENE offers CRISPR knockout, point mutation, knock-in, and overexpression cell models for genes such as RPE, G6PD, DXS, and DXR.
Conclusion
GO:1901159, D-xylulose 5-phosphate biosynthetic process, represents a critical metabolic node that connects the pentose phosphate pathway to isoprenoid biosynthesis. Its study is relevant to human diseases such as Crohn's disease-associated fibrosis and to antimicrobial drug discovery targeting the MEP pathway. Advances in CRISPR-based models and metabolomic technologies continue to illuminate the regulation and therapeutic potential of this process. By leveraging precise gene editing and bioinformatics, researchers can dissect the causal roles of individual enzymes and regulators in D-xylulose 5-phosphate production. EDITGENE's suite of CRISPR services supports these efforts, enabling the creation of tailored cell models for mechanistic and translational studies.
References
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