title: Isolation by genetic and physiological characteristics of a fuel-ethanol fermentative Saccharomyces cerevisiae strain with potential for genetic manipulation.
abstract: Fuel ethanol fermentation process is a complex environment with an intensive succession of yeast strains. The population stability depends on the use of a well-adapted strain that can fit to a particular industrial plant. This stability helps to keep high level of ethanol yield and it is absolutely required when intending to use recombinant strains. Yeast strains have been previously isolated from different distilleries in Northeast Brazil and clustered in genetic strains by PCR-fingerprinting. In this report we present the isolation and selection of a novel Saccharomyces cerevisiae strain by its high dominance in the yeast population. The new strain, JP1 strain, presented practically the same fermentative capacity and stress tolerance like the most used commercial strains, with advantages of being highly adapted to different industrial units in Northeast Brazil that used sugar cane juice as substrate. Moreover, it presented higher transformation efficiency that pointed out its potential for genetic manipulations. The importance of this strain selection programme for ethanol production is discussed.
authors.affiliation: Setor de Biologia Molecular/LIKA, Recife, PE, Brazil.
authors.forename: Eurípedes Alves
authors.initials: EA
authors.lastname: da Silva Filho
authors.forename: Hélio Fernandes
authors.initials: HF
authors.lastname: de Melo
authors.forename: Daiane Felberg
authors.initials: DF
authors.lastname: Antunes
authors.forename: Scheila Karina Brito
authors.initials: SK
authors.lastname: dos Santos
authors.forename: Alecsandra
authors.initials: A
authors.lastname: do Monte Resende
authors.forename: Diogo Ardaillon
authors.initials: DA
authors.lastname: Simões
authors.forename: Marcos Antonio
authors.initials: MA
authors.lastname: de Morais
mesh_terms: D000143:Acids; D000222:Adaptation, Physiological; D016172:DNA Fingerprinting; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D007218:Industrial Microbiology; D012441:Saccharomyces cerevisiae / Q000145:classification / Q000302:isolation & purification / Q000502:physiology*; D031786:Saccharum / Q000378:metabolism; D013045:Species Specificity
chemical_list: D000143:Acids; D000431:Ethanol