Uteroglobin (IPR000329)

Short name: Uteroglobin

Overlapping homologous superfamilies


Family relationships


Uteroglobin (blastokinin or Clara cell protein CC10) is a mammalian steroid-inducible secreted protein originally isolated from the uterus of rabbits during early pregnancy [PMID: 2378892]. 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 [PMID: 3319534,PMID: 11193767], and binding to (and possibly sequestering) several hydrophobic ligands such as progesterone, retinols, polychlorinated biphenyls, phospholipids and prostaglandins [PMID: 11193782,PMID: 11193750]. 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 [PMID: 17916741, PMID: 17928103, PMID: 11193760, PMID: 7770456]. 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 [PMID: 3656405]. 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 [PMID: 11193783]. 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 [PMID: 17163411].

GO terms

Biological Process

GO:0007165 signal transduction

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.