GO_term: GO:0000372   

GO:0000372	Definition	The splicing of Group I introns. This occurs by a ribozymic mechanism where the intron sequence forms a distinct 3D structure, characteristic of Group I introns and involved in determining the locations of the splice sites (there do not appear to be consensus splice site sequences) as well as having a role in catalyzing the splicing reactions, though protein factors are also required in vivo. Splicing occurs by a series of two transesterification reactions, generally with exogenous guanosine as the initiating nucleophile. The intron is excised as a linear piece (though it may subsequently circularize).
	Term	Group I intron splicing
	Type	Biological_process
	Parent	Instance_of	GO:0000376
	Attributes_of	Index (2)

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