title: Splicing of yeast tRNA precursors: structure of the reaction intermediates.
abstract: The intermediates of the yeast tRNA splicing reaction have been characterized. The intervening sequence is excised as an unique linear molecule. It has 5'-hydroxyl and 3'-phosphate termini. Correspondingly, the half-tRNA molecules are shown to have a 3'-phosphate terminus on the 5' half and 5'-hydroxyl terminus on the 3' half. These isolated halves have been shown to be active in the ligation step of tRNA splicing. Removal of the 3'-phosphate from the 5' half eliminates the ability of the 5' half to participate in ligation.
mesh_terms: D001483:Base Sequence; D009690:Nucleic Acid Conformation; D009694:Nucleic Acid Precursors / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism; D012331:RNA, Fungal / Q000378:metabolism*; D012346:RNA, Transfer, Amino Acyl / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
chemical_list: D009694:Nucleic Acid Precursors; D010710:Phosphates; D012331:RNA, Fungal; D012346:RNA, Transfer, Amino Acyl