Reference: Gimble FS and Thorner J (1992) Homing of a DNA endonuclease gene by meiotic gene conversion in Saccharomyces cerevisiae. Nature 357(6376):301-6

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Abstract

An unusual protein splicing reaction joins the N-terminal segment (A) and the C-terminal segment (C) of the 119K primary translation product (ABC) of the yeast VMA1 gene to yield a 69K vacuolar H(+)-ATPase subunit (AC) and an internal 50K polypeptide (B). This 50K protein is a site-specific DNA endonuclease that shares 34% identity with the homothallic switching endonuclease. The site cleaved by the VMA1-derived endonuclease exists in a VMA1 allele that lacks the derived endonuclease segment of the open reading frame. Cleavage at this site only occurs during meiosis and initiates 'homing', a genetic event that converts a VMA1 allele lacking the endonuclease coding sequence into one that contains it.

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Gimble FS, Thorner J
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