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{{Infobox enzyme
| Name = Adenosylcobinamide-GDP ribazoletransferase
| EC_number = 2.7.8.26
| CAS_number = 137672-85-6
| IUBMB_EC_number = 2/7/8/26
| GO_code = 
| image = 
| width = 
| caption =
}}
'''Adenosylcobinamide-GDP ribazoletransferase''' ({{EC number|2.7.8.26}}, ''CobS'', ''cobalamin synthase'', ''cobalamin-5'-phosphate synthase'', ''cobalamin (5'-phosphate) synthase'') is an [[enzyme]] with system name ''adenosylcobinamide-GDP:alpha-ribazole ribazoletransferase''.<ref>{{cite journal | title = In vitro synthesis of the nucleotide loop of cobalamin by ''Salmonella typhimurium'' enzymes |author = Maggio-Hall, L.A. and Escalante-Semerena, J.C. |journal = Proc. Natl. Acad. Sci. USA |year = 1999 |volume = 96 |pages = 11798–11803 |pmid = 10518530 |doi=10.1073/pnas.96.21.11798 |pmc=18366}}</ref><ref>{{cite journal | title = The biosynthesis of adenosylcobalamin (vitamin B<sub>12</sub>) |author = Warren, M.J., Raux, E., Schubert, H.L. and Escalante-Semerena, J.C. |journal = Nat. Prod. Rep. |year = 2002 |volume = 19 |pages = 390–412 |pmid = 12195810 |doi=10.1039/b108967f}}</ref><ref>{{cite journal | title = Genetic analysis, nucleotide sequence, and products of two ''Pseudomonas denitrificans'' ''cob'' genes encoding nicotinate-nucleotide:  dimethylbenzimidazole phosphoribosyltransferase and cobalamin  (5&prime;-phosphate) synthase |author = Cameron, B., Blanche, F., Rouyez, M.C., Bisch, D., Famechon, A., Couder, M., Cauchois, L., Thibaut, D., Debussche, L. and Crouzet, J. |journal = J. Bacteriol. |year = 1991 |volume = 173 |pages = 6066–6073 |pmid = 1917841 |issue=19 |pmc=208353}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: (1) adenosylcobinamide-GDP + alpha-ribazole <math>\rightleftharpoons</math> GMP + [[adenosylcobalamin]]
: (2)  adenosylcobinamide-GDP + alpha-ribazole 5'-phosphate <math>\rightleftharpoons</math> GMP + adenosylcobalamin 5'-phosphate

== References ==
{{reflist}}

== External links ==
* {{MeshName|Adenosylcobinamide-GDP+ribazoletransferase}}

[[Category:EC 2.7.8]]