Mannose 1-phosphate

Mannose 1-phosphate, an endogenous metabolite, serves as a substrate for the enzyme GDP-mannose pyrophosphorylase to synthesize GDP-Man [1].

Clervonafusp alfa (VAL-1221) is a fusion protein targeting both cytosolic and lysosomal glycogen, addressing the mechanisms of Pompe disease. It combines the Fab segment of a cell-penetrating antibody with recombinant human acid alpha-glucosidase (rhGAA). The Fab portion utilizes the nucleoside transporter ENT-2 for cytosolic entry, while rhGAA accesses lysosomes via mannose-6-phosphate receptors (M6PRs). This dual-targeting approach suggests Clervonafusp alfa as a potential therapeutic research candidate for late-onset Pompe disease [1].

Phosphomannose isomerase, the initial enzyme in GDP-Man biosynthesis, catalytically facilitates the interconversion of fructose-6-phosphate (Fru6P) and mannose-6-phosphate (Man6P), playing a crucial role in cell wall synthesis and protein glycosylation. It is also recognized as a significant antifungal target against threats from A. flavus [1].