Description | Uteroglobin (blastokinin or Clara cell protein CC10) is a mammalian steroid-inducible secreted protein originally isolated from the uterus of rabbits during early pregnancy [ ]. The mucosal epithelia of several organs that communicate with the external environment express uteroglobin. Its tissue-specific expression is regulated by steroid hormones, and is augmented in the uterus by non-steroidal prolactin. Uteroglobin may be a multi-functional protein with anti-inflammatory/immunomodulatory properties, acting to inhibit phospholipase A2 activity [, ], and binding to (and possibly sequestering) several hydrophobic ligands such as progesterone, retinols, polychlorinated biphenyls, phospholipids and prostaglandins [ , ]. In addition, uteroglobin has anti-chemotactic, anti-allergic, anti-tumourigenic and embryo growth-stimulatory properties. Uteroglobin may have a homeostatic role against oxidative damage, inflammation, autoimmunity and cancer [, , , ]. However, the true biological function of uteroglobin is poorly understood. Uteroglobin consists of a disulphide-linked homodimer with a large hydrophobic pocket located between the two dimers []. Each monomer being composed of four helices that do not form a canonical four helix-bundle motif but rather a boomerang-shaped structure in which helices H1, H3, and H4 are able to bind a homodimeric partner []. The hydrophobic pocket binds steroids, particularly progesterone, with high specificity. It is a member of the secretoglobin superfamily.This entry represents uteroglobin proteins from several mammalian species [ ]. | Name | Uteroglobin |
Short Name | Uteroglobin | Type | Family |