A naturally evolved dominant core subset of the Model Soil Consortium-1 (MSC-1) containing 13 bacterial species from arid grassland soil. This stable consortium was enriched through serial dilution and passaging on chitin as the primary carbon source. The core members include representatives from Actinobacteria, Bacteroidetes, and Proteobacteria, with key species including Rhodococcus sp., Dyadobacter sp., Taibaiella sp., Bosea sp., and Streptomyces sp. The consortium exhibits cooperative chitin degradation and nitrogen mineralization functions essential for soil carbon and nitrogen cycling.
Taxonomy
| Taxon | Ontology ID | Functional Roles | Abundance |
|---|---|---|---|
| Rhodococcus sp. | NCBITaxon:1827 |
PRIMARY_DEGRADER
|
DOMINANT |
| Streptomyces sp. | NCBITaxon:1931 |
PRIMARY_DEGRADER
|
DOMINANT |
| Dyadobacter sp. | NCBITaxon:1914288 |
PRIMARY_DEGRADER
|
DOMINANT |
| Taibaiella sp. | NCBITaxon:1869185 |
SYNTROPHIC_PARTNER
|
COMMON |
| Bosea sp. | NCBITaxon:85413 |
SYNTROPHIC_PARTNER
|
COMMON |
| Neorhizobium sp. | NCBITaxon:1911909 |
SYNTROPHIC_PARTNER
|
COMMON |
| Sphingopyxis sp. | NCBITaxon:1908224 |
SYNTROPHIC_PARTNER
|
COMMON |
| Ensifer sp. | NCBITaxon:1872086 |
SYNTROPHIC_PARTNER
|
COMMON |
| Variovorax sp. | NCBITaxon:1871043 |
SYNTROPHIC_PARTNER
|
COMMON |
| Sinorhizobium sp. | NCBITaxon:42445 |
SYNTROPHIC_PARTNER
|
COMMON |
| Mycobacterium sp. | NCBITaxon:1785 |
SYNTROPHIC_PARTNER
|
COMMON |
| Actinobacteria bacterium | NCBITaxon:201174 |
SYNTROPHIC_PARTNER
|
RARE |
| Bacteroidetes bacterium | NCBITaxon:976 |
SYNTROPHIC_PARTNER
|
RARE |
Ecological Interactions
Chitin Polymer Degradation
SYNTROPHYMetabolites: chitin (CHEBI:18246), chitooligosaccharide (CHEBI:142816)
Biological Processes:
- chitin catabolic process (GO:0006032)
- chitinase activity (GO:0004568)
Evidence
-
PMID:32983014 - SUPPORT (IN_VITRO)"Chitin was chosen because it is an abundant carbon and nitrogen polymer in soil that often requires the coordinated action of several microorganisms for complete metabolic degradation"
N-Acetylglucosamine Processing
SYNTROPHYMetabolites: N-acetyl-D-glucosamine (CHEBI:28009), D-glucosamine (CHEBI:15767)
Biological Processes:
- glucosamine catabolic process (GO:0006046)
- carbohydrate metabolic process (GO:0005975)
Evidence
-
PMID:32983014 - SUPPORT (IN_VITRO)"Co-abundance analyses highlighted interspecies interactions and helped to define keystone species, including Mycobacterium, Rhodococcus, and Rhizobiales taxa"
Nitrogen Mineralization
SYNTROPHYMetabolites: ammonium (CHEBI:28938), organic nitrogen compound (CHEBI:35352)
Biological Processes:
- nitrogen cycle metabolic process (GO:0071941)
- cellular amino acid metabolic process (GO:0006520)
Evidence
-
PMID:32983014 - SUPPORT (IN_VITRO)"Chitin was chosen because it is an abundant carbon and nitrogen polymer in soil that often requires the coordinated action of several microorganisms for complete metabolic degradation"
Environmental Factors
| Factor | Value | Unit |
|---|---|---|
| Source environment | arid grassland soil | N/A |
| Primary substrate | chitin | N/A |
| Environmental conditions | arid conditions | N/A |
| Community complexity | reduced complexity model | N/A |
| Functional redundancy | genomic redundancy | N/A |
| Storage stability | cryopreservation | N/A |