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{{Infobox enzyme
| Name = Beta-seco-amyrin synthase
| EC_number = 5.4.99.54
| CAS_number = 
| IUBMB_EC_number = 5/4/99/54
| GO_code = 
| image = 
| width = 
| caption =
}}
'''Beta-seco-amyrin synthase''' ({{EC number|5.4.99.54}}) is an [[enzyme]] with system name ''(3S)-2,3-epoxy-2,3-dihydrosqualene mutase (cyclizing, beta-seco-amyrin-forming)''.<ref>{{cite journal | title = Origin of structural diversity in natural triterpenes: direct synthesis of seco-triterpene skeletons by oxidosqualene cyclase |author = Shibuya, M., Xiang, T., Katsube, Y., Otsuka, M., Zhang, H. and Ebizuka, Y. |journal = J. Am. Chem. Soc. |year = 2007 |volume = 129 |pages = 1450–1455 |pmid = 17263431}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: (3S)-2,3-epoxy-2,3-dihydrosqualene <math>\rightleftharpoons</math> beta-seco-amyrin

The enzyme from ''[[Arabidopsis thaliana]]'' is multifunctional.

== References ==
{{reflist}}

== External links ==
* {{MeshName|Beta-seco-amyrin+synthase}}

[[Category:EC 5.4.99]]