FB2026_02 , released June 18, 2026

CV Term Report

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General Information

Term

RNA polymerase I complex

ID (Ontology)

GO:0005736 (Gene Ontology)

Definition

RNA polymerase I, one of three nuclear DNA-directed RNA polymerases found in all eukaryotes, is a multisubunit complex; typically it produces rRNAs. Two large subunits comprise the most conserved portion including the catalytic site and share similarity with other eukaryotic and bacterial multisubunit RNA polymerases. The remainder of the complex is composed of smaller subunits (generally ten or more), some of which are also found in RNA polymerase III and others of which are also found in RNA polymerases II and III. Although the core is competent to mediate ribonucleic acid synthesis, it requires additional factors to select the appropriate template.

Also Known As

"DNA-directed RNA polymerase I complex"

Comment

Links to External Ontologies

QuickGO data AmiGO data

Annotations

Records annotated with this term OR any of its CHILD TERMS

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

Data Class	Field	Direct annotations
Genes (FBgn)	GO_CELLULAR_COMPONENT

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	Gene Groups	Genes
RNA polymerase I complex (all annotations which use CV term, excluding "NOT" statements)
part_of \| RNA polymerase I complex	--

Spanning Tree (Parents/Children)

nucleus
 |__nuclear protein-containing complex___
RNA polymerase complex                   |
 |__DNA-directed RNA polymerase complex__|
nuclear lumen                            |
 |__nucleolus____________________________|
protein-containing complex               |
 |__nuclear protein-containing complex___|
intracellular membraneless organelle     |
 |__nucleolus____________________________|
                                         RNA polymerase I complex  14 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	DNA-directed RNA polymerase complex nuclear protein-containing complex
Part of	nucleolus
Synonyms & Secondary IDs
Synonyms
	"DNA-directed RNA polymerase I activity" RELATED "DNA-directed RNA polymerase I complex" EXACT
Secondary IDs

External Crossreferences & Linkouts