| |||||||||||||||||||
Secretoglobins are relatively small, secreted, disulphide-bridged dimeric proteins with encoding genes sharing substantial sequence similarity. Their family subunits may be grouped into five subfamilies, A-E. Uteroglobin (subfamily A), which is identical to Clara cell protein (CC10), forms a globular shaped homodimer with a large hydrophobic pocket located between the two dimers. The uteroglobin monomer structure is composed of four alpha 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. However, the true biological function of uteroglobin is poorly understood. In mammals, uteroglobin has immunosuppressive and anti-inflammatory properties through the inhibition of phospholipase A2. The other four main subfamilies of secretoglobins are found in heterodimeric combinations, with B and C subfamilies disulphide-bridged to the E and D subfamilies, respectively. [See review by Laukaitis C.M. & Karn R.C. (2005). Biological Journal of the Linnean Society 84, 493]. These include rat prostatic steroid-binding protein (PBP or prostatein), human mammaglobin (or heteroglobin), lipophilins, major cat allergen Fel dI, the hamster Harderian gland proteins and mouse salivary androgen-binding protein (ABP). Example of such a heterodimer: ABPalpha-like sequences are closely related to cat Fel dI chain 1, whereas ABPbeta-gamma-like sequences are closely related to Fel dI chain 2. Thus, the heterodimeric structure of ABPalpha-beta and ABPalpha-gamma is recapitulated by the sequence-similar Fel dI chains 1 and 2. This conservation of primary and quaternary structure indicates that the genome of the eutherian common ancestor of cats, rodents, and primates contained a similar gene pair.
No pairwise interactions are available for this conserved domain.
Tips:  If you've navigated here from a protein, hovering over a position on the weblogo will display the corresponding protein position for that domain position. The histograms below the weblogo indicate mutations found on the domain. Red is for disease (OMIM) and blue is for SNPs. Functional Features are displayed as orange boxes under the histograms. You can choose which features are displayed in the box below. Range on the Protein: Protein ID Protein Position Domain Position: 
|
|---|
Weblogos are Copyright (c) 2002 Regents of the University of California
| DMDM_info@umbc.edu | 1000 Hilltop Circle, Baltimore, MD 21250 | Department of Biological Sciences | Phone: 410-455-2258 |