| Product Name | 
petromyzonol sulfotransferase | 
| Example Structure | 
  | 
| Synonyms | 
PZ-SULT | 
| EC Number | 
2.8.2.31 | 
| CAS Registry Number | 
 | 
| Comments | 
The enzyme from the lamprey?Petromyzon marinus?can also use the corresponding 3-ketone as a substrate. It is stereoselective (5¦Á-cholane) and regioselective, exhibiting a preference for an hydroxy group at C-24. The enzyme is inactive when allocholic acid, which has a carboxy group at C-24, is used as a substrate. | 
| Cofactor | 
 | 
| History | 
 | 
| Reactions | 
3′-phosphoadenylyl sulfate + 5-alpha-cholan-3-alpha,7-alpha,12-alpha,24- tetrol = adenosine 3′,5′-bisphosphate + 5-alpha-cholan-3-alpha,7- alpha,12-alpha-triol 24-sulfate. |