ID   2.4.99.21
DE   dolichyl-phosphooligosaccharide-protein glycotransferase.
AN   archaeal oligosaccharyl transferase.
AN   dolichyl-monophosphooligosaccharide-protein glycotransferase.
CA   an archaeal dolichyl phosphooligosaccharide + [protein]-L-asparagine =
CA   an archaeal dolichyl phosphate + a glycoprotein with the oligosaccharide
CA   chain attached by N-beta-D-glycosyl linkage to a protein L-asparagine.
CC   -!- The enzyme, characterized from the archaea Methanococcus voltae and
CC       Haloferax volcanii, transfers a glycan component from dolichyl
CC       phosphooligosaccharide to external proteins.
CC   -!- It is different from EC 2.4.99.18 which uses dolichyl diphosphate as
CC       carrier compound in bacteria and eukaryotes.
CC   -!- The enzyme participates in the N-glycosylation of proteins in some
CC       archaea.
CC   -!- Dolichol used by archaea is different from that used by eukaryotes;
CC       it is much shorter (C55-C60), it is alpha,omega-saturated and it may
CC       have additional unsaturated positions in the chain.
DR   O29918, AGLB1_ARCFU;  Q8U4D2, AGLB1_PYRFU;  O74088, AGLB1_PYRHO;
DR   O30195, AGLB2_ARCFU;  Q8U3P6, AGLB2_PYRFU;  O58981, AGLB2_PYRHO;
DR   O29867, AGLB3_ARCFU;  D4GYH4, AGLB_HALVD ;  Q58920, AGLB_METJA ;
DR   Q2EMT4, AGLB_METVO ;
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