Secretoglobin Family 2A, Member 2 (SCGB2A2)

SCGB2A2 is member of the superfamily of secretoglobins, a group of small dimeric secreted and sometimes glycosylated proteins. Expressed mainly in mucosa, secretoglobins seems to be involved in cell signalling, immune response, chemotaxis, and could also serve as transporters for steroid hormones in humans. MGB1 encodes a deduced 93-amino acid protein with a 19-amino acid hydrophobic peptide signal sequence and a predicted molecular mass of 10.5-kD. The protein shares 42% sequence identity with the rat prostatein protein (rPSC3). It also shares high homology with rabbit and human uteroglobin (UGB) genes, including the conservation of cysteines known to play a role in disulfide bond formation between uteroglobin subunits and a conserved tyrosine required for progesterone binding to the uteroglobin dimer.