Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase

Search
PMC	articles
PubMed	articles
NCBI	proteins

Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase
Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase
Identifiers
EC no.	2.4.1.258
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
PMC
Search
PMC	articles
PubMed	articles
NCBI	proteins

Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol alpha-1,3-mannosyltransferase (EC 2.4.1.258, Man5GlcNAc2-PP-Dol mannosyltransferase, ALG3, dolichyl-P-Man:Man(5)GlcNAc(2)-PP-dolichyl mannosyltransferase, Not56-like protein, Alg3 alpha-1,3-mannosyl transferase, Dol-P-Man:Man5GlcNAc2-PP-Dol alpha-1,3-mannosyltransferase) is an enzyme with systematic name dolichyl beta-D-mannosyl phosphate:D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-(D-Man-alpha-(1->6))-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol alpha-1,3-mannosyltransferase.^[1]^[2] This enzyme catalyses the following chemical reaction

dolichyl beta-D-mannosyl phosphate + D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-[D-Man-alpha-(1->6)]-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol

\rightleftharpoons

D-Man-alpha-(1->2)-D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-[D-Man-alpha-(1->3)-D-Man-alpha-(1->6)]-D-Man-beta-(1->4)-D-GlcNAc-beta-(1->4)-D-GlcNAc-diphosphodolichol + dolichyl phosphate

The formation of N-glycosidic linkages of glycoproteins involves the ordered assembly of the common Glc3Man9GlcNAc2 core-oligosaccharide on the lipid carrier dolichyl diphosphate.

References

^ Sharma CB, Knauer R, Lehle L (February 2001). "Biosynthesis of lipid-linked oligosaccharides in yeast: the ALG3 gene encodes the Dol-P-Man:Man5GlcNAc2-PP-Dol mannosyltransferase". Biological Chemistry. 382 (2): 321–8. doi:10.1515/bc.2001.039. PMID 11308030.
^ Cipollo JF, Trimble RB (February 2000). "The accumulation of Man(6)GlcNAc(2)-PP-dolichol in the Saccharomyces cerevisiae Deltaalg9 mutant reveals a regulatory role for the Alg3p alpha1,3-Man middle-arm addition in downstream oligosaccharide-lipid and glycoprotein glycan processing". The Journal of Biological Chemistry. 275 (6): 4267–77. doi:10.1074/jbc.275.6.4267. PMID 10660594.

Rearick JI, Fujimoto K, Kornfeld S (1981). "Identification of the mannosyl donors involved in the synthesis of lipid-linked oligosaccharides". J. Biol. Chem. 256 (8): 3762–9. PMID 6163773.

External links

Dolichyl-P-Man:Man5GlcNAc2-PP-dolichol+alpha-1,3-mannosyltransferase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

[1] Sharma CB, Knauer R, Lehle L (February 2001). "Biosynthesis of lipid-linked oligosaccharides in yeast: the ALG3 gene encodes the Dol-P-Man:Man5GlcNAc2-PP-Dol mannosyltransferase". Biological Chemistry. 382 (2): 321–8. doi:10.1515/bc.2001.039. PMID 11308030.

[2] Cipollo JF, Trimble RB (February 2000). "The accumulation of Man(6)GlcNAc(2)-PP-dolichol in the Saccharomyces cerevisiae Deltaalg9 mutant reveals a regulatory role for the Alg3p alpha1,3-Man middle-arm addition in downstream oligosaccharide-lipid and glycoprotein glycan processing". The Journal of Biological Chemistry. 275 (6): 4267–77. doi:10.1074/jbc.275.6.4267. PMID 10660594.

[1]

[2]