Fungal cell wall mannoprotein

Fungal cell wall mannoproteins are highly glycosylated proteins that constitute the outermost layer of the fungal cell wall, serving as the primary interface between the fungus and its environment (PMID: 16460230). These proteins are essential for maintaining structural integrity and are critical for virulence, mediating adhesion to host surfaces and the formation of biofilms (PMID: 19151350). In the context of infection, mannoproteins act as pathogen-associated molecular patterns (PAMPs) recognized by host immune receptors like Dectin-2 and Mannose Receptor, though they also facilitate immune evasion by masking underlying beta-glucans (PMID: 25135932). Therapeutically, they are targeted by mannan-binding agents such as pradimicins and are the focus of monoclonal antibody and vaccine development (PMID: 17174487). Additionally, the detection of circulating mannoproteins, such as galactomannan and mannan, serves as a vital diagnostic biomarker for invasive fungal diseases like aspergillosis and candidiasis (PMID: 15561820).

Other names

MannanFungal mannanCell wall glycoproteinGPI-anchored cell wall proteinCWPMannose-containing glycoproteinFungal cell wall mannoproteins

Mannan-binding agents like pradimicins recognize and bind to the mannose residues of mannoproteins in a calcium-dependent manner, leading to the disruption of the fungal cell membrane and cell wall, ultimately causing cell death (PMID: 17174487). Monoclonal antibodies target specific mannoproteins to block adhesion to host tissues or to opsonize the fungal cells for phagocytosis (PMID: 22460961).