FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term TSS ID (Ontology) SO:0000315 (Sequence Ontology)
Definition The first base where RNA polymerase begins to synthesize the RNA transcript.
Also Known As "INSDC_note:transcription_start_site" ; "transcription start site" ; "transcription_start_site"
Comment
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SO.org
Annotations
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Sequence Features (FBsf)  FEATURE_TYPE   43532
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 Full annotation statements 
Relevant FlyBase reports
 Genes Sequence Features
 TSS (all annotations which use CV term, excluding "NOT" statements)    7830  43532
Spanning Tree (Parents/Children)
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transcript_region
 |__primary_transcript_region__
promoter_element               |
 |__core_promoter_element______|
                               TSS  51362 rec.
                                |__major_TSS
                                |__minor_TSS
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Is a primary_transcript_region
core_promoter_element
Part of
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Synonyms
  • "INSDC_feature:misc_feature" BROAD
    "INSDC_note:transcription_start_site" EXACT
    "transcription start site" EXACT
    "transcription_start_site" EXACT
Secondary IDs
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