FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

radial spoke

ID (Ontology)

GO:0001534 (Gene Ontology)

Definition

Protein complex that links the outer microtubule doublet of a 9+2 type ciliary or flagellar axoneme with the sheath that surrounds the central pair of microtubules. Composed of a stalk that attaches to each doublet microtubule and a globular structure (spoke head) that projects toward the central pair of microtubules.[ ISBN:0124325653 PubMed:22118931 PubMed:25694453 PubMed:34871179 PubMed:9450971 ]

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
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
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	Alleles	Genes
radial spoke (all annotations which use CV term, excluding "NOT" statements)
part_of \| radial spoke	--

Spanning Tree (Parents/Children)

cellular_component
 |__protein-containing complex__
cytoskeleton                    |
 |__axoneme_____________________|
ciliary plasm                   |
 |__axoneme_____________________|
cellular anatomical structure   |
 |__axoneme_____________________|
                                radial spoke  2 rec.
                                 |__radial spoke 1
                                 |   |__radial spoke base 1
                                 |   |__radial spoke head 1
                                 |__radial spoke 2
                                 |   |__radial spoke base 2
                                 |   |__radial spoke head 2
                                 |__radial spoke 3
                                 |   |__radial spoke base 3
                                 |   |__radial spoke head 3
                                 |__radial spoke base
                                 |   |__radial spoke base 1
                                 |   |__radial spoke base 2
                                 |   |__radial spoke base 3
                                 |__radial spoke head
                                 |   |__radial spoke head 1
                                 |   |__radial spoke head 2
                                 |   |__radial spoke head 3
                                 |__radial spoke neck
                                 |__radial spoke stalk

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	protein-containing complex
Part of	axoneme
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts
	Wikipedia:Radial_spoke