FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term actomyosin contractile ring ID (Ontology) GO:0005826 (Gene Ontology)
Definition A cytoskeletal structure composed of actin filaments and myosin that forms beneath the plasma membrane of many cells, including animal cells and yeast cells, in a plane perpendicular to the axis of the spindle, i.e. the cell division plane. In animal cells, the contractile ring is located at the cleavage furrow. In budding fungal cells, e.g. mitotic S. cerevisiae cells, the contractile ring forms at the mother-bud neck before mitosis.[ ISBN:0805319409 ISBN:0815316194 PubMed:28914606 ]
Also Known As "CAR" ; "contractile actomyosin ring"
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Annotations
Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      13
Genes (FBgn)  GO_CELLULAR_COMPONENT       5
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       6
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Constructs
 actomyosin contractile ring (all annotations which use CV term, excluding "NOT" statements)      13      5      6
     actomyosin contractile ring | embryonic stage 5       3       --       1
     actomyosin contractile ring | embryonic stage 5 | maternal effect      11       --      10
     actomyosin contractile ring | heat sensitive       1       --       --
     actomyosin contractile ring | male       1       --       --
     actomyosin contractile ring | maternal effect       3       --       --
     is_active_in | actomyosin contractile ring       --       2       --
     located_in | actomyosin contractile ring       --       4       --
Spanning Tree (Parents/Children)
Only view relationship:
  cellular anatomical structure
   |__contractile ring
       |__actomyosin contractile ring  27 rec.
           |__meiotic actomyosin contractile ring
           |   |__prospore contractile ring
           |__mitotic actomyosin contractile ring 1 rec.
               |__cellular bud neck contractile ring
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Is a contractile ring
Part of cortical actin cytoskeleton
cell division site
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Synonyms
  • "actomyosin ring" RELATED
    "CAR" EXACT
    "constriction ring" RELATED
    "contractile actomyosin ring" EXACT
    "cytokinetic ring" RELATED
Secondary IDs
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