
|
Laboratory of Systems Microbial Biotechnology Brief Biograph In our laboratory, lactic acid bacteria and extremophiles with acid-, alkali-, and solvent-tolerance will be selected as research models. Insights into the molecular basis and the regulatory mechanism for the production of bulk chemicals by these microorganisms will be gained using genomics tool. By integrating the data generated from genomics, novel metabolic engineering strategies will be developed to improve the functionality of industrial microorganisms. We are also interested in developing novel methodology to support the development of systems biotechnology. This includes high-throughput screening method for obtaining desired microorganisms with industrial potential for producing bio-based chemicals; novel genetic tools for prokaryotes and genome-wide random mutagenesis strategy; methodology for integrating data generated from genome, transcriptome, proteome, metabolome, and fluxome studies; and development of genome-scale metabolic models by which the biological behavior of microorganisms can be predicted and simulated. Grants1. National Key Technologies R&D Program (863) “Key Technology for Bio-butanol Production” 2. Chinese Academy of Sciences (CAS) “Hundred-talent Project” 3. The Key Project of the Knowledge Innovation Program of Chinese Academy of Sciences (CAS): Key Technology for the Production of L-Lactic Acid. Awards and Honors Lactic Acid Bacteria: genomics, genetics, physiology, and application 1. Li Y, Canchaya C, Fang F, Raftis E, Ryan KA, van Pijkeren J-P, van Sinderen D, O’Toole PW. Distribution of megaplasmids in Lactobacillus salivarius and other lactobacilli. J. Bacteriol., 2007, 189(17): 6128-6139. 2. Zhang J, Fu R-Y, Hugenholtz J, Li Y* Chen J*. Glutathione protects Lactococcus lactis against acid stress. Appl. Environ. Microbiol., 2007, 73(16): 5268-5275. 3. Corr SC, Li Y, Riedel CU, O’Toole PW, Hill C, Gahan CGM. Bacteriocin production as a mechanism for the anti-infective activity of Lactobacillus salivarius UCC118. Proc. Natl. Acad. Sci. U. S. A., 2007, 104(18): 7617-7621. (cover article) 4. Claesson MJ*, Li Y*, Leahy S, Canchaya C, van Pijkeren JP, Cerdeño-Tárragad AM, Parkhill J, Flynn S, Collins JK, Higgins D, Shanahan F, Fitzgerald GF, van Sinderen D, O'Toole PW. Multi-replicon genome architecture of Lactobacillus salivarius. Proc. Natl. Acad. Sci. U. S. A., 2006, 103(17): 6718-6723. (cover article) (*equally contributed to this work). 5. Li Y, Raftis E, Canchaya C, Fitzgerald GF, van Sinderen D, O'Toole PW. Polyphasic analysis indicates that Lactobacillus salivarius subsp. salivarius and Lactobacillus salivarius subsp. salicinius do not merit separate subspecies status. Int. J. Syst. Evol. Microbiol., 2006, 56(10): 2397-2403. 6. van Pijkeren JP, Canchaya C, Ryan KA, Li Y, Claesson MJ, Sheil B, Steidler L, O’Mahony L, Fitzgerald GF, van Sinderen D, O’Toole PW. Comparative and functional analysis of sortase-dependent proteins in the predicted secretome of Lactobacillus salivarius. Appl. Environ. Microbiol., 2006, 72(6): 4143-4153. 7. Ventura M, Canchaya C, Bernini V, Altermann E, Barrangou R, Mc Grath S, Claesson MJ, Li Y, Leahy S, Walker CD, Zink R, Neviani E, Steele J, Broadbent J, Klaenhammer TR, Fitzgerald GF, O’Toole PW, van Sinderen D. Comparative genomics and transcriptional analysis of prophages identified in the genomes of Lactobacillus gasseri,Lactobacillus salivarius and Lactobacillus casei. Appl. Environ. Microbiol., 2006, 72(5): 3130-3146. 8. Fu R-Y, Bongers BS, van Swam II, Chen J, Molenaar D, Kleerebezem M, Hugenholtz J, Li Y*. Introducing glutathione biosynthetic capability into Lactococcus lactis subsp. cremoris NZ9000 improves the oxidative-stress resistance of the host. Metab. Eng., 2006, 8(6): 662-671. 9. Fu R-Y, Chen J, Li Y*. Heterologous production of transglutaminase in Lactococcus lactis significantly enhances the growth performance of the host. Appl. Environ. Microbiol., 2005, 71(12): 8911-8919. 10. Li Y, Hugenholtz J, Sybesma W, Abee J, Molenaar D. Using Lactococcus lactis for glutathione overproduction. Appl. Microbiol. Biotechnol., 2005, 67(1): 83-90. 11. Li Y, Hugenholtz J, Abee J, Molenaar D. Glutathione protects Lactococcus lactis against oxidative stress. Appl. Environ. Microbiol., 2003, 69(10): 5739-5745.
Industrial Biotechnology: efficient production of commodity and specialty chemicals 12. Du C, Zhang Y, Li Y, Cao Z. A novel redox-potential-based screening strategy for rapid isolation of Klebsiella pneumoniae mutants with enhanced 1,3-propanediol producing capability. Appl. Environ. Microbiol., 2007, 73(14): 4515-4521 13. Liu L-M, Li Y, Zhu Y, Du G, Chen J. Redistribution of carbon flux in Torulopsis glabrata by altering vitamin and calcium level. Metab. Eng., 2007, 9(1): 21-29. 14. Zhang Y, Li Y, Du C, Liu M, Cao Z. Inactivation of aldehyde dehydrogenase: a key factor for engineering 1,3-propanediol production by Klebsiella pneumoniae. Metab. Eng., 2006, 8(6): 578-586. 15. Liu L-M, Li Y, Chen J. Redirection of the NADH oxidation pathway in Torulopsis glabrata leads to an enhanced pyruvate production. Appl. Microbiol. Biotechnol., 2006, 72(2): 377-385. 16. Du C, Yan H, Zhang Y, Li Y, Cao Z. Use oxidoreduction potential as an indicator to regulate 1,3- propanediol fermentation by Klebsiella pneumoniae. Appl. Microbiol. Biotechnol., 2006, 69(5): 554-563. 17. Li Y, Wei G, Chen J. Glutathione: a review on biotechnological production. Appl. Microbiol. Biotechnol., 2004, 66(3): 233-242 (Mini-review) 18. Li Y, He N, Guan H, Du G, Chen J. A novel poly-galacturonic acid bioflocculant REA-11 produced by Corynebacterium glutamicum: A proposed biosynthetic pathway and experimental confirmation. Appl. Microbiol. Biotechnol., 2003, 63(2): 200-206. 19. Li Y, Hugenholtz J, Chen J, Lun S. Enhancement of pyruvate production by Torulopsis glabrata using a two-stage oxygen supply control strategy. Appl. Microbiol. Biotechnol., 2002, 60(1-2): 101-106. 20. Li Y, Chen J, Lun S, Rui X. Efficient production of pyruvic acid by Torulopsis glabrata: the key role of vitamins and its' optimization. Appl. Microbiol. Biotechnol., 2001, 55(6): 680-685. 21. Li Y, Chen J, Lun S. Biotechnological production of pyruvic acid. Appl. Microbiol. Biotechnol., 2001, 57(4): 471-479 (Invited mini-review)
Laboratory Staff Qiuwei Zhao, MSc
|