PRG2, Official Symbol PRG2provided by HGNC Official Full Name proteoglycan 2, pro eosinophil major basic proteinprovided by HGNC Primary source HGNC:HGNC:9362 See related Ensembl:ENSG00000186652 MIM:605601; AllianceGenome:HGNC:9362 Gene type protein coding RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as MBP; BMPG; MBP1; proMBP Summary The protein encoded by this gene 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. The encoded protein contains a peptide that displays potent antimicrobial activity against Gram-positive bacteria, Gram-negative bacteria, and fungi. It is directly implicated in epithelial cell damage, exfoliation, and bronchospasm in allergic diseases. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2014] Annotation information Note: MBP is an alias on both PRG2 (Gene ID: 5553, "major basic protein") and MBL2 (Gene ID: 4153, "mannose-binding protein C"). MBP is also the official symbol on GeneID: 4155 (myelin basic protein). [01 Jun 2018] Expression Restricted expression toward placenta (RPKM 1164.9) See more Orthologs mouse all