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{{enzyme
| Name = beta-glucogallin O-galloyltransferase
| EC_number = 2.3.1.90
| CAS_number = 87502-55-4
| IUBMB_EC_number = 2/3/1/90
| GO_code = 0047201
| image = 
| width = 
| caption = 
}}
In [[enzymology]], a '''beta-glucogallin O-galloyltransferase''' ({{EC number|2.3.1.90}}) is an [[enzyme]] that [[catalysis|catalyzes]] the [[chemical reaction]]

:2 1-O-galloyl-beta-D-glucose <math>\rightleftharpoons</math> D-glucose + 1-O,6-O-digalloyl-beta-D-glucose

Hence, this enzyme has one [[substrate (biochemistry)|substrate]], [[1-O-galloyl-beta-D-glucose]], and two [[product (chemistry)|products]], [[D-glucose]] and [[1-O,6-O-digalloyl-beta-D-glucose]].

This enzyme belongs to the family of [[transferase]]s, specifically those [[acyltransferase]]s transferring groups other than aminoacyl groups.  The systematic name of this enzyme class is '''1-O-galloyl-beta-D-glucose:1-O-galloyl-beta-D-glucose O-galloyltransferase'''. 

==References==
{{reflist|1}}
* {{cite journal | author = Denzel K, Schilling G and Gross, GG | date = 1988 | title = Biosynthesis of gallotannins - enzymatic conversion of 1,6-digalloylglucose to 1,2,6-trigalloylglucose | journal = Planta  | volume = 176 | pages = 135&ndash;137 | doi = 10.1007/BF00392489 }}
* {{cite journal | author = Gross, GG | date = 1983 | title = Synthesis of mono-galloyl-beta-D-glucose di-galloyl-beta-D-glucose and trigalloyl-beta-D-glucose by beta-glucogallin-dependent galloyltransferases from oak leaves | journal = Z. Natursforsch. C: Biosci.  | volume = 38 | pages = 519&ndash;523 }}

{{transferase-stub}}

[[Category:EC 2.3.1]]
[[Category:Enzymes of unknown structure]]