Protein splicing: excision of intervening sequences at the protein level.
Protein splicing is an extraordinary post-translational reaction that removes an intact central "spacer" domain (Sp) from precursor proteins (N-Sp-C) while splicing together the N- and C-domains of the precursor, via a peptide bond, to produce a new protein (N-C). All of the available data on protein splicing fit a model in which these intervening sequences excise at the protein level via a self-splicing mechanism. Several proteins have recently been discovered that undergo protein splicing, and in two such cases, the excised spacer protein is an endonuclease. Such endonucleases are capable of conferring genetic mobility upon the intervening sequences that encodes them. These intervening sequences define a new family of mobile genetic elements that are translated yet remain phenotypically silent by excising at the protein rather than the RNA level.
Cooper
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Institute of Molecular Biology, University of Oregon, Eugene 97403.
Stevens
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D000595:Amino Acid Sequence; D001105:Archaea / Q000235:genetics / Q000378:metabolism; D003208:Concanavalin A / Q000096:biosynthesis; D004259:DNA-Directed DNA Polymerase / Q000235:genetics; D005656:Fungal Proteins / Q000096:biosynthesis / Q000235:genetics; D005798:Genes, Bacterial; D005800:Genes, Fungal; D008954:Models, Biological; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000235:genetics / Q000378:metabolism; D011498:Protein Precursors / Q000378:metabolism*; D011499:Protein Processing, Post-Translational; D006180:Proton-Translocating ATPases; D011938:Rec A Recombinases / Q000096:biosynthesis / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
D005656:Fungal Proteins; D011498:Protein Precursors; D011993:Recombinant Fusion Proteins; D029701:Saccharomyces cerevisiae Proteins; D003208:Concanavalin A; D011938:Rec A Recombinases; D004259:DNA-Directed DNA Polymerase; D006180:Proton-Translocating ATPases; C081687:VMA1 protein, S cerevisiae