ID   2.4.1.258
DE   dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase.
AN   Alg3 alpha-1,3-mannosyl transferase.
AN   Dol-P-Man:Man5GlcNAc2-PP-Dol alpha-1,3-mannosyltransferase.
AN   Man5GlcNAc2-PP-Dol mannosyltransferase.
CA   a dolichyl beta-D-mannosyl phosphate + alpha-D-Man-(1->2)-alpha-D-Man-
CA   (1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-
CA   GlcNAc-(1->4)-alpha-D-GlcNAc-diphosphodolichol = a dolichyl phosphate +
CA   alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-
CA   (1->3)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-alpha-
CA   D-GlcNAc-diphosphodolichol + H(+).
CC   -!- The formation of N-glycosidic linkages of glycoproteins involves the
CC       ordered assembly of the common Glc3Man9GlcNAc2 core-oligosaccharide
CC       on the lipid carrier dolichyl diphosphate.
CC   -!- Early mannosylation steps occur on the cytoplasmic side of the
CC       endoplasmic reticulum with GDP-Man as donor, the final reactions from
CC       Man5GlcNAc2-PP-dolichyl to Man9Glc-NAc2-PP-dolichyl on the lumenal
CC       side use dolichyl beta-D-mannosyl phosphate.
CC   -!- The first step of this assembly pathway on the luminal side of the
CC       endoplasmic reticulum is catalyzed by ALG3.
CC   -!- Formerly EC 2.4.1.130.
DR   O82244, ALG3_ARATH ;  A1CBE6, ALG3_ASPCL ;  Q4WVG2, ALG3_ASPFU ;
DR   A2RA94, ALG3_ASPNC ;  Q2U6A4, ALG3_ASPOR ;  Q6FXS2, ALG3_CANGA ;
DR   P0CN93, ALG3_CRYNB ;  P0CN92, ALG3_CRYNJ ;  Q6BYY8, ALG3_DEBHA ;
DR   Q55F69, ALG3_DICDI ;  Q751K5, ALG3_EREGS ;  Q92685, ALG3_HUMAN ;
DR   Q6CMF1, ALG3_KLULA ;  Q6DNA2, ALG3_KOMPG ;  Q8K2A8, ALG3_MOUSE ;
DR   A1DDZ3, ALG3_NEOFI ;  Q9C1K8, ALG3_NEUCR ;  Q0TVF9, ALG3_PHANO ;
DR   A5DJQ5, ALG3_PICGU ;  A3LTB7, ALG3_PICST ;  Q9Y7I4, ALG3_SCHPO ;
DR   P38179, ALG3_YEAST ;
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