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{{Infobox enzyme
| Name = UDP-N-acetylgalactosamine diphosphorylase
| EC_number = 2.7.7.83
| CAS_number = 
| IUBMB_EC_number = 2/7/7/83
| GO_code = 
| image = 
| width = 
| caption =
}}
'''UDP-N-acetylgalactosamine diphosphorylase''' ({{EC number|2.7.7.83}}) is an [[enzyme]] with system name ''UTP:N-acetyl-alpha-D-galactosamine-1-phosphate uridylyltransferase''.<ref>{{cite journal | title = A 17-amino acid insert changes UDP-<em>N</em>-acetylhexosamine pyrophosphorylase specificity from UDP-GalNAc to UDP-GlcNAc |author = Wang-Gillam, A., Pastuszak, I. and Elbein, A.D. |journal = J. Biol. Chem. |date = 1998 |volume = 273 |pages = 27055-27057 |pmid = 9765219 |doi=10.1074/jbc.273.42.27055}}</ref><ref>{{cite journal | title = Crystal structures of two human pyrophosphorylase isoforms in complexes with UDPGlc(Gal)NAc: role of the alternatively spliced insert in the enzyme oligomeric assembly and active site architecture |author = Peneff, C., Ferrari, P., Charrier, V., Taburet, Y., Monnier, C., Zamboni, V., Winter, J., Harnois, M., Fassy, F. and Bourne, Y. |journal = EMBO J. |date = 2001 |volume = 20 |pages = 6191-6202 |pmid = 11707391 |doi=10.1093/emboj/20.22.6191 |pmc=125729}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: UTP + N-acetyl-alpha-D-galactosamine 1-phosphate <math>\rightleftharpoons</math> [[diphosphate]] + UDP-N-acetyl-alpha-D-galactosamine

The enzyme from [[plant]]s and [[animal]]s also acts on N-acetyl-alpha-D-glucosamine 1-phosphate.

== References ==
{{reflist}}

== External links ==
* {{MeshName|UDP-N-acetylgalactosamine+diphosphorylase}}

[[Category:EC 2.7.7]]