Tomoregulin 1 (TR1)

EGF-like domain is an evolutionary conserved protein domain, of about thirty to forty amino-acid residues long, which was found in a large number of mostly animal proteins.Eib and Martens (1996) cloned a novel Xenopus gene, 7365, that is enriched in neuroendocrine tissues. The predicted protein contains a signal peptide, a transmembrane domain, 2 follistatin modules, and an EGF-like domain, a cysteine-rich region first identified in epidermal growth factor. Eib et al. (1998) stated that the unique EGF-like domain and transmembrane and cytoplasmic regions of the human homolog are nearly identical to those found in the mouse and frog homologs.Eib et al. (1998) used somatic cell hybrids and fluorescence in situ hybridization to map the TMEFF1 gene to human chromosome 9q31.