BIO 122 Chapter Notes - Chapter 11: Mating Of Yeast, Adenylyl Cyclase, Paracrine Signalling
11 Nov 2016
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Document Summary
Cells use signals to communicate from other cells and environment. Cellular agents chop up dna and fragment organelles and other cytoplasmic components. Cell parts become packaged and digested by specialized scavenger cells leaving no trace: evolution of cell signaling. Two types of sexes/mating types in yeast (saccharomyces cerevisiae) Each mate secretes a factor binds to receptors on the other mate. A pair of cells opposite type change shape grow towards each other. Creates new a/alpha cell of all genes of the original cells. Mating signal is changed/transduced into a form that brings the cellular response of mating. Signal transduction pathway signals received at cell"s surface cellular response. Similarities b/w yeast and mammals early versions of cell signaling evolved before multicellular creatures. First evolution in proks and single cell euks. Quorum sensing - process used as concentration of signaling molecules allow bacteria to sense local population density. Ex) biofilm - bacterial cells adhered to surface of teeth, leaves.
