Search Ontology:
GO: Cellular Component

type III site-specific deoxyribonuclease complex

Term ID
GO:0019813
Synonyms
  • type III restriction enzyme complex
Definition
A heterodimeric enzyme complex composed of two subunits, Res and Mod, that functions as an endonuclease and cleaves DNA. Cleavage will only occur when there are two un-methylated copies of a specific recognition site in an inverse orientation on the DNA. Cleavage occurs at a specific distance away from one of the recognition sites. The Mod subunit can act alone as a methyltansferase. DNA restriction systems such as this are used by bacteria to defend against phage and other foreign DNA that may enter a cell. 12654995
References
Ontology
GO: Cellular Component    QuickGO    AmiGO
Relationships
is part of
is a type of
Phenotype
Phenotype caused by Genes