| 词条 | Sarsasapogenin 3β-glucosyltransferase |
| 释义 |
| Name = sarsasapogenin 3-β-glucosyltransferase | EC_number = 2.4.1.193 | CAS_number = 117698-14-3 | IUBMB_EC_number = 2/4/1/193 | GO_code = 0047249 | image = | width = | caption = }} In enzymology, a sarsasapogenin 3β-glucosyltransferase ({{EC number|2.4.1.193}}) is an enzyme that catalyzes the chemical reaction UDP-glucose + sarsasapogenin {{eqm}} UDP + sarsasapogenin 3-O-β-D-glucoside Thus, the two substrates of this enzyme are UDP-glucose and sarsasapogenin [(3β,5β,25S)-spirostan-3-ol], whereas its two products are UDP and sarsasapogenin 3-O-β-D-glucoside.[1] The enzyme was first isolated from the root of the common asparagus (Asparagus officinalis).[1] It is specific for substrate sterols with the uncommon 5β-configuration (sarsasapogenin and smilagenin), that is with a cis-linkage between the A and B rings of the steroid nucleus.[1] This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-glucose:(3β,5β,25S)-spirostan-3-ol 3-O-β-D-glucosyltransferase. This enzyme is also called uridine diphosphoglucose-sarsasapogenin glucosyltransferase. References1. ^1 2 {{citation | last1 = Paczkowski | first1 = Cezary | last2 = Wojciechowski | first2 = Zdzisław A. | title = The occurrence of UDPG-dependent glucosyltransferase specific for sarsasapogenin in Asparagus officinalis | journal = Phytochemistry | volume = 27 | issue = 9 | year = 1988 | pages = 2743–47 | doi = 10.1016/0031-9422(88)80654-X}}. {{Glycosyltransferases}}{{Enzymes}}{{Portal bar|Molecular and Cellular Biology|border=no}}{{2.4-enzyme-stub}}{{DEFAULTSORT:Sarsasapogenin 3betta-glucosyltransferase}} 2 : EC 2.4.1|Enzymes of unknown structure |
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