COMPARATIVE GENOME SEQUENCE ANALYSIS AND GENETIC ENGINEERING OF TOLERANT ETHANOLOGENIC YEAST SACCHAROMYCES CEREVISIAE NRRL Y-50049
Bioenergy Research Unit
2009 Annual Report
1a.Objectives (from AD-416)
Identify genomic basis and relationships between enhanced inhibitor tolerance and efficient heterogeneous sugars utilization derived from lignocelluolosic biomass; engineer tolerant Saccharomyces cerevisiae NRRL Y-50049 for improved and balanced utilization of pentoses and hexoses from lignocellulosic hydrolysates.
1b.Approach (from AD-416)
Comparative genome sequence analysis will be carried out to underline genetic fundamentals of the tolerance and in situ detoxification of the biomass conversion inhibitors. Comparative genome expression analysis will be carried out to establish gene regulatory networks involving tolerance and heterogeneous sugar utilizations including pentoses and hexoses. Genetic engineering will be carried out to incorporate heterogeneous genes into the tolerant Y-50049 for improved pentose utilization.
Genomic deoxyribonucleic acid (DNA) and yeast cultures of NRRL Y-50049 and NRRL Y-12632 were sent to Qingdao Institute of Bioenergy and Bioprocessing Technology (QIBEBT), Chinese Academy of Sciences, Qingdao, China, under MTA #6412. Currently, the DNA sequencing preparation is underway at QIBEBT. At NCAUR, we have constructed proper tools of genetic engineering suitable for the stress tolerant yeast. The collaborative efforts have been coordinated/monitored by frequent emails, phone conversations, and occasional visits. A visiting scientist sponsored by QIBEBT is scheduled to visit and work at NCAUR.