cyclase activity (GO:0009975)

Catalysis of a ring closure reaction.

Specific

(-)-E-beta-caryophyllene synthase activity (GO:0080016) adenylate cyclase activity (GO:0004016) allene-oxide cyclase activity (GO:0046423) alpha-humulene synthase activity (GO:0080017) carboxy-cis,cis-muconate cyclase activity (GO:0047768) cyclic 2,3-diphosphoglycerate synthetase activity (GO:0036356) cytidylate cyclase activity (GO:0047805) D-glutamate cyclase activity (GO:0047820) delta-tocopherol cyclase activity (GO:0052604) FAD-AMP lyase (cyclizing) activity (GO:0034012) gamma-tocopherol cyclase activity (GO:0052605) geranyl-diphosphate cyclase activity (GO:0047926) glycosylphosphatidylinositol diacylglycerol-lyase activity (GO:0047396) guanylate cyclase activity (GO:0004383) halimadienyl-diphosphate synthase activity (GO:0035439) lycopene beta cyclase activity (GO:0045436) lycopene epsilon cyclase activity (GO:0045435) purine imidazole-ring cyclase activity (GO:0050230) RNA-3'-phosphate cyclase activity (GO:0003963) sabinene synthase activity (GO:0080015) solanapyrone synthase activity (GO:0033190) squalene cyclase activity (GO:0034072) tocopherol cyclase activity (GO:0009976)

References

gene ontology: GO:0009975