Ruminococcus albus 8
Introduction
Ruminococcus albus 8
Ruminococcus albus 8 is an obligately anaerobic, fibrolytic bacterium originally isolated from the rumen of an alfalfa-fed cow by Marvin P. Bryant.
While R. albus 8 shares core phenotypic characteristics with other strains, genomic and transcriptomic analyses indicate that it exhibits a specialized ecological preference for hemicellulose and xylan degradation over highly crystalline cellulose, distinguishing it from the highly cellulolytic R. albus 7 [1]. The strain secretes multiple endoxylanases and utilizes a unique phosphoketolase pathway for the rapid catabolism of pentose sugars, producing acetate, ethanol, formate, and hydrogen [2]. In the rumen, R. albus 8 contributes to the energy acquisition of the host animal through the production of volatile fatty acids, while acting in syntrophy with methanogenic archaea by providing the hydrogen necessary for enteric methane production.
LPSN: Ruminococcus albus Hungate 1957
NCBI: Ruminococcus albus 8
GTDB: Ruminococcus albus
Risk group: 1
Global Methane Hub Metadata
| Origin: | United States of America, Mackie lab |
| Sequenced by: | Makoto Adachi |
| Assembled by: | William G. Alexander |
| Methylome called by: | William G. Alexander |
| Methyltransferases cloned by: | Roy Rodriguez Carrero |
| MIC and Culturing Conditions by: | Roy Rodriguez Carrero |
| Transformation by: |
Genome
DefenseFinder Results
Methylome
| Motif | Percent methylated |
|---|---|
| G(6mA)TCC | 99.53 |
| GG(6mA)TC | 99.93 |
| GG(6mA)GG | 98.88 |
| GNC(6mA)YNNNNNNCCT | 97.47 |
| (6mA)GGNNNNNNRTGNC | 99.28 |
| G(6mA)TNNNNCTCA | 98.36 |
| TG(6mA)GNNNNATC | 97.64 |
| A(5mC)GGG | 97.16 |
| C(5mC)CGT | 87.25 |
| G(5mC)CTCC | 85.17 |
Methylating E. coli
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Culturing Conditions
R. albus 8 grown well in M2GSC and M10 medium at 37°C. Plating efficiency of R. albus 8 on M10 agar is close to 89%.
Antimicrobial MIC Tests
Note: Antimicrobial MIC was assessed using M2GSC liquid medium.
| Antibiotic | Concentration (µg/ml) |
|---|---|
| Ampicilin | 0.1 |
| Chlorhamphenicol | Resistance (>200) |
| Erythromycin | 0.1 |
| Gentamycin | 0.1 |
| Kanamycin | 0.6 |
| Streptomycin | Resistance (>200) |
| Tetracycline | 1 |
Protocols
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Transformation Results
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External Links
[1] Kwon I. 2016. Comparative whole genome transcriptional responses of Ruminococcus albus strain 7 and 8: a case for specialization and niche differentiation. Ph.D. dissertation. University of Illinois at Urbana-Champaign, Urbana, IL.
[2] Moon YH, Iakiviak M, Bauer S, Mackie RI, Cann IKO. 2011. Biochemical analyses of multiple endoxylanases from the rumen bacterium Ruminococcus albus 8 and their synergistic activities with accessory hemicellulose-degrading enzymes. Appl Environ Microbiol 77:5157–5169.
