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carbon-nitrogen lyase activity (GO:0016840)
Annotations: Rat: (13) Mouse: (13) Human: (15) Chinchilla: (9) Bonobo: (13) Dog: (16) Squirrel: (12) Pig: (14)
Parent Terms Term With Siblings Child Terms
lyase activity +     
3'-deoxyribose phosphate lyase activity 
alkylmercury lyase activity 
carbon phosphorus lyase activity +  
carbon-carbon lyase activity +   
carbon-halide lyase activity +  
carbon-nitrogen lyase activity +   
Catalysis of the release of ammonia or one of its derivatives, with the formation of a double bond or ring. Enzymes with this activity may catalyze the actual elimination of the ammonia, amine or amide, e.g. CH-CH(-NH-R) = C=CH- + NH2-R. Others, however, catalyze elimination of another component, e.g. water, which is followed by spontaneous reactions that lead to breakage of the C-N bond, e.g. L-serine ammonia-lyase (EC:, so that the overall reaction is C(-OH)-CH(-NH2) = CH2-CO- + NH3, i.e. an elimination with rearrangement. The sub-subclasses of EC:4.3 are the ammonia-lyases (EC:4.3.1), lyases acting on amides, amidines, etc. (EC:4.3.2), the amine-lyases (EC:4.3.3), and other carbon-nitrogen lyases (EC:4.3.99).
carbon-oxygen lyase activity +   
carbon-sulfur lyase activity +   
ferrochelatase activity +   
indoleacetaldoxime dehydratase activity 
phosphorus-oxygen lyase activity +   
sirohydrochlorin cobaltochelatase activity 

Narrow Synonyms: other carbon-nitrogen lyase activity
Xrefs: EC:4.3
Definition Sources: EC:4.3.-.-

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