PRG2

PRG2 is the predominant constituent of the crystalline core of the eosinophil granule. High levels of the proform of this protein are also present in placenta and pregnancy serum, where it exists as a complex with several other proteins including pregnancy-associated plasma protein A (PAPPA), angiotensinogen (AGT), and C3dg. This protein may be involved in antiparasitic defense mechanisms as a cytotoxin and helminthotoxin, and in immune hypersensitivity reactions.

Proteoglycan 2, Pro Eosinophil Major Basic Protein

Cytotoxin and helminthotoxin. Also induces non-cytolytic histamine release from human basophils. Involved in antiparasitic defense mechanisms and immune hypersensitivity reactions. The proform acts as a proteinase inhibitor, reducing the activity of PAPPA.

Defense response to bacteriumIEA:UniProtKB-KW
Defense response to nematodeIEA:Ensembl
Immune responseIEA:InterPro
Negative regulation of interleukin-10 productionIEA:Ensembl
Negative regulation of macrophage cytokine productionIEA:Ensembl
Positive regulation of interleukin-4 productionIEA:Ensembl

Bone marrow proteoglycan
Secreted
The proform is secreted.
Eosinophil granule major basic protein
Cytoplasmic vesicle, secretory vesicle
The proform is secreted. The mature protein is found in the matrix of the eosinophil's large specific granule (crystalloid core).

Nitrated.