Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom. The first yeast originated hundreds of millions of years ago, and at least 1,500 species are currently recognized. They are estimated to constitute 1% of all described fungal species.
Pichia pastoris is a species of methylotrophic yeast. It was found in the 1960s, with its feature of using methanol as a source of carbon and energy. After years of study, P. pastoris was widely used in biochemical research and biotech industries. With strong potential for being an expression system for protein production, as well as being a model organism for genetic study, P. pastoris has become important for biological research and biotech applications. In the last decade, some reports reassigned P. pastoris to the genus Komagataella with phylogenetic analysis, by genome sequencing of P. pastoris. The genus was split into K. phaffii, K. pastoris, and K. pseudopastoris.
The Saccharomycetaceae are a family of yeasts in the order Saccharomycetales that reproduce by budding. Species in the family have a cosmopolitan distribution, and are present in a wide variety of habitats, especially those with a plentiful supply of carbohydrate sources. The family contains the species Saccharomyces cerevisiae, perhaps the most economically important fungus.
Candida glabrata is a species of haploid yeast of the genus Candida, previously known as Torulopsis glabrata. Despite the fact that no sexual life cycle has been documented for this species, C. glabrata strains of both mating types are commonly found. C. glabrata is generally a commensal of human mucosal tissues, but in today's era of wider human immunodeficiency from various causes, C. glabrata is often the second or third most common cause of candidiasis as an opportunistic pathogen. Infections caused by C. glabrata can affect the urogenital tract or even cause systemic infections by entrance of the fungal cells in the bloodstream (Candidemia), especially prevalent in immunocompromised patients.
Pichia is a genus of yeasts in the family Pichiaceae with spherical, elliptical, or oblong acuminate cells. Pichia is a teleomorph, and forms hat-shaped, hemispherical, or round ascospores during sexual reproduction. The anamorphs of some Pichia species are Candida species. The asexual reproduction is by multilateral budding.
Kluyveromyces is a genus of ascomycetous yeasts in the family Saccharomycetaceae. Some of the species, such as K. marxianus, are the teleomorphs of Candida species.
Ogataea polymorpha is a methylotrophic yeast with unusual characteristics. It is used as a protein factory for pharmaceuticals.
A yeast expression platform is a strain of yeast used to produce large amounts of proteins, sugars or other compounds for research or industrial uses. While yeast are often more resource-intensive to maintain than bacteria, certain products can only be produced by eukaryotic cells like yeast, necessitating use of a yeast expression platform. Yeasts differ in productivity and with respect to their capabilities to secrete, process and modify proteins. As such, different types of yeast are better suited for different research and industrial applications.
Lachancea kluyveri is an ascomycetous yeast associated with fruit flies, slime fluxes, soils and foods.
Autophagy related 7 is a protein in humans encoded by ATG7 gene. Related to GSA7; APG7L; APG7-LIKE.
A killer yeast is a yeast, such as Saccharomyces cerevisiae, which is able to secrete one of a number of toxic proteins which are lethal to susceptible cells. These "killer toxins" are polypeptides that kill sensitive cells of the same or related species, often functioning by creating pores in target cell membranes. These yeast cells are immune to the toxic effects of the protein due to an intrinsic immunity. Killer yeast strains can be a problem in commercial processing because they can kill desirable strains. The killer yeast system was first described in 1963. Study of killer toxins helped to better understand the secretion pathway of yeast, which is similar to those of more complex eukaryotes. It also can be used in treatment of some diseases, mainly those caused by fungi.
The Pichiaceae are a family of yeasts in the order Saccharomycetales. According to the 2007 Outline of Ascomycota, the family contains four genera, but GBIF lists 15 genera. The family was named by Zender in 1925.
Nakazawaea is a genus of yeast in the order Saccharomycetales. The relationship of this taxon to other taxa within the order is not fully unknown.
Herman Jan Phaff was a scientist who specialised in yeast ecology. He was born in the Netherlands before moving to California at age of 26. He was active in Californian universities until his death. During his career he accumulated thousands of strains of yeast from the wild, and described 60 new taxa of yeast.
Pichia heedii is a species of yeast in the family Saccharomycetaceae. Described in 1978, it was found growing on a dead senita cactus plant in the Sonoran Desert of Baja California, Mexico. The species was named to honor William B. Heed and his contributions to the study of desert-adapted yeasts.
The Lilieae are a monophyletic tribe of monocotyledon perennial, herbaceous mainly bulbous flowering plants in the lily family (Liliaceae).
Saitoella is a genus of two species of yeast in the family Protomycetaceae.
Rhodobacter capsulatus is a species of purple bacteria, a group of bacteria that can obtain energy through photosynthesis. Its name is derived from the Latin adjective "capsulatus", itself derived Latin noun "capsula", and the associated Latin suffix for masculine nouns, "-atus".
Ogataea is a genus of ascomycetous yeasts in the family Saccharomycetaceae. It was separated from the former genus Hansenula via an examination of their 18S and 26S rRNA partial base sequencings by Yamada et al. 1994.
