FB2026_03 , released September 17, 2026

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

Links to External Ontologies

SO.org

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Results list data from multiple species. Choose a record type above to open its HitList.

Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Sequence Features (FBsf)	FEATURE_TYPE

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Genes	Sequence Features
TSS (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

promoter
 |__core_promoter_element______
primary_transcript             |
 |__primary_transcript_region__|
transcript_region              |
 |__primary_transcript_region__|
promoter_element               |
 |__core_promoter_element______|
                               TSS  51362 rec.
                                |__major_TSS
                                |__minor_TSS

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	primary_transcript_region core_promoter_element
Part of
Synonyms & Secondary IDs
Synonyms
	"INSDC_feature:misc_feature" BROAD "INSDC_note:transcription_start_site" EXACT "transcription start site" EXACT "transcription_start_site" EXACT
Secondary IDs

External Crossreferences & Linkouts