D-Mannose 6-phosphate

Mannose 6-phosphate, also known as alpha-D-mannose-6-p or man-6-p, belongs to the class of organic compounds known as hexose phosphates. These are carbohydrate derivatives containing a hexose substituted by one or more phosphate groups. Mannose 6-phosphate exists in all eukaryotes, ranging from yeast to humans. Within humans, mannose 6-phosphate participates in a number of enzymatic reactions. In particular, mannose 6-phosphate can be converted into fructose 6-phosphate through its interaction with the enzyme mannose-6-phosphate isomerase. In addition, mannose 6-phosphate can be biosynthesized from D-mannose through the action of the enzyme hexokinase-1. Mannose 6-phosphate is a potent competitive inhibitor of pinocytosis of human platelet beta-glucuronidase and it is a necessary component of the recognition marker on the enzyme for pinocytosis by human fibroblasts as well (PMID 908752). In humans, mannose 6-phosphate is involved in fructose intolerance, hereditary.

ID EC Number Name
KEGG:R00772 5.3.1.8 D-mannose-6-phosphate aldose-ketose-isomerase
KEGG:R01326 2.7.1.1 ATP:D-mannose 6-phosphotransferase
KEGG:R01327 2.7.1.1 ITP:D-mannose 6-phosphotransferase
KEGG:R01330 2.7.1.1 dATP:D-mannose 6-phosphotransferase
KEGG:R01817 1.1.1.224 D-mannitol-1-phosphate:NADP+ 6-oxidoreductase
KEGG:R01818 5.4.2.8 D-mannose 6-phosphate 1,6-phosphomutase
KEGG:R01819 5.3.1.8 D-mannose-6-phosphate aldose-ketose-isomerase
KEGG:R02630 2.7.1.191 protein-N(pi)-phosphohistidine:D-mannose 6-phosphotransferase
KEGG:R08405 2.7.1.61 acyl-phosphate:D-mannose phosphotransferase
KEGG:R09645 3.2.1.- C16699 + C00001<=>C00275 + C00258
KEGG:R11439 2.5.1.132 phosphoenolpyruvate:D-mannose-6-phosphate 1-(2-carboxy-2-oxoethyl)transferase
KEGG:R13490 4.2.3.230 D-mannose-6-phosphate phosphate-lyase (2-deoxy-4-epi-scyllo-inosose-forming)