A defined two-strain Yarrowia lipolytica consortium engineered to convert lignocellulose-derived oligosaccharides into lipids through metabolic division of labor. The system partitions hydrolysis and assimilation between a cellobiose-specialized YBGL3/YBGL1 lineage and a xylooligosaccharide-specialized YBXT-XR lineage, then benchmarks the consortium against a single multifunctional YBXT-XR-BGL3 strain. In mixed glucose, cellobiose, and xylooligosaccharide coculture, the division-of-labor consortium raised lipid accumulation above the monoculture benchmark and shifted toward the YBXT-XR partner after cellobiose depletion.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| cellobiose-specialized Yarrowia lipolytica strain — ontology label: Yarrowia lipolytica | NCBITaxon:4952 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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COMMON |
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| xylooligosaccharide-specialized Yarrowia lipolytica YBXT-XR — ontology label: Yarrowia lipolytica | NCBITaxon:4952 · TaxonMech · TraitMech |
PRIMARY_DEGRADER
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COMMON |
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Ecological Interactions
The graph shows only explicitly linked interaction participants. Community members without an asserted participant link are omitted; membership alone does not imply an interaction.
Oligosaccharide Hydrolysis Division of Labor
YBGL3 and YBXT-XR distribute cellobiose and xylooligosaccharide hydrolysis, respectively. Both can use glucose, and the experiments did not achieve simultaneous glucose/xylose consumption. The tested coculture uses YBGL3, not an interchangeable YBGL1 partner. Division of enzyme production is not proof of reduced competition, cross-feeding or relief of a demonstrated prohibitive metabolic burden.
Participating Taxa: cellobiose-specialized Yarrowia lipolytica strain, xylooligosaccharide-specialized Yarrowia lipolytica YBXT-XR
Metabolites: cellobiose (CHEBI:17057 · MediaIngredientMech · CMMMech), xylose (CHEBI:18222 · MediaIngredientMech · CMMMech)
PARTIAL: Differential substrate capacities are consistent with the population shift after cellobiose depletion. The time course supports temporal succession but does not isolate depletion from other changing culture conditions.
PARTIAL: The tested division-of-labor design yielded the higher final lipid fraction in the nitrogen-limited 1:5 consortium. The comparison does not identify burden relief as mediator or establish superior titer or performance at every inoculum ratio.
Evidence
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doi:10.64898/2025.12.19.695487 - SUPPORT (IN_VITRO)"we also developed a cellobiose-specialized strain (YBGL3 or YBGL1) and a xylooligosaccharide-specialized strain (YBXT-XR)"
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doi:10.64898/2025.12.19.695487 - SUPPORT (IN_VITRO)"the YBGL3 + YBXT-XR cocultures"
Population Shift to YBXT-XR
NICHE_PARTITIONINGIn the mixed-substrate cocultures, YBXT-XR became predominant after cellobiose depletion, while YBGL3 could not use the remaining xylose resource. This is observed temporal succession consistent with differential substrate use, not proof that engineered partners avoid early glucose competition or that depletion was selectively manipulated as the sole cause.
Participating Taxa: cellobiose-specialized Yarrowia lipolytica strain, xylooligosaccharide-specialized Yarrowia lipolytica YBXT-XR
Metabolites: cellobiose (CHEBI:17057 · MediaIngredientMech · CMMMech), xylose (CHEBI:18222 · MediaIngredientMech · CMMMech)
Biological Processes:
- lipid biosynthetic process (GO:0008610 · PathwayMech)
Evidence
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doi:10.64898/2025.12.19.695487 - SUPPORT (IN_VITRO)"following cellobiose depletion (after 72 h), YBXT-XR became predominant and utilized the remaining xylooligosaccharides almost exclusively for lipid synthesis"
Higher Lipid Fraction in the 1:5 Consortium
The nitrogen-limited 1:5 YBGL3:YBXT-XR consortium reached a lipid fraction of 34% versus 26.3% in the multifunctional monoculture. The best consortium and monoculture reached comparable lipid titers, while the 1:2 consortium performed worse. A higher lipid fraction is not a general increase in titer, growth or productivity, nor evidence of lower metabolic burden.
Participating Taxa: cellobiose-specialized Yarrowia lipolytica strain, xylooligosaccharide-specialized Yarrowia lipolytica YBXT-XR
Metabolites: lipid (CHEBI:18059 · MediaIngredientMech · CMMMech)
Biological Processes:
- lipid biosynthetic process (GO:0008610 · PathwayMech)
Evidence
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doi:10.64898/2025.12.19.695487 - SUPPORT (IN_VITRO)"the division-of-labor approach led to higher lipid accumulation (34% versus 26.3% in the monoculture)"
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doi:10.64898/2025.12.19.695487 - SUPPORT (IN_VITRO)"the 1:5 consortium ultimately reached a comparable lipid titer at 168 h"
Knowledge gaps & discussions (1)
KNOWLEDGE_GAP OPEN Which strain-level processes account for the lipid-fraction difference without a titer advantage?
The full-text Results and Discussion identify YBGL3/YBXT-XR, shared glucose use and an inoculum-dependent outcome. Distinguish lipid fraction from titer and rate, and substrate succession from true co-consumption. Resolve apparent Methods/Results inoculum-ratio wording inconsistencies before extending quantitative metadata. The source is bioRxiv version 1, not certified peer-reviewed evidence.
Attaches to: ecological_interactions#Oligosaccharide Hydrolysis Division of Labor, ecological_interactions#Population Shift to YBXT-XR, ecological_interactions#Higher Lipid Fraction in the 1:5 Consortium
1 evidence item(s)
the 1:5 consortium ultimately reached a comparable lipid titer at 168 h
The primary comparison limits the performance claim.
External Resources
| Name | Repository | Resource ID |
|---|---|---|
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Primary preprint - Y. lipolytica division-of-labor lipid consortium
bioRxiv preprint describing the engineered Y. lipolytica oligosaccharide-to-lipid consortium. |
OTHER | doi:10.64898/2025.12.19.695487 |
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Environmental Factors
| Factor | Value | Unit |
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| Mixed lignocellulose-derived oligosaccharide substrate | glucose, cellobiose, and xylooligosaccharides | N/A |
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Growth Media
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