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The Sequence Types and Features Ontology (SO) is downloaded weekly from the SourceForge CVS repository at For more information about this ontology, see the Sequence Ontology Home Page at

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Accession:SO:0002320 term browser browse the term
Definition:A sequence variant that leads to a change in the location of a termination codon in a transcript but allows the transcript to escape nonsense-mediated decay (NMD). The change in location of a termination codon can be caused by several different types of sequence variants, including stop_gained (SO:0001587), frameshift_variant (SO:0001589), splice_donor_variant (SO:0001575), and splice_acceptor_variant (SO:0001574) types of variants.
Comment:Added as per request from Ang Roberts as part of GenCC November 2020.
Synonyms:exact_synonym: NMD escaping variant;   nonsense-mediated decay escaping variant

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  SO ontology 0
    sequence_variant 0
      functional_effect_variant 0
        functionally_abnormal 0
          NMD_escaping_variant 0
            frameshift_variant_NMD_escaping 0
            splice_acceptor_variant_NMD_escaping 0
            splice_donor_variant_NMD_escaping 0
            stop_gained_NMD_escaping 0
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