EGF-like domain (IPR000742)

Short name: EGF-like_dom

Overlapping homologous superfamilies


Domain relationships


A sequence of about thirty to forty amino-acid residues long found in the sequence of epidermal growth factor (EGF) has been shown [PMID: 2288911, PMID: 6334307, PMID: 6607417, PMID: 3282918] to be present, in a more or less conserved form, in a large number of other, mostly animal proteins. EGF is a polypeptide of about 50 amino acids with three internal disulfide bridges. It first binds with high affinity to specific cell-surface receptors and then induces their dimerization, which is essential for activating the tyrosine kinase in the receptor cytoplasmic domain, initiating a signal transduction that results in DNA synthesis and cell proliferation.

A common feature of all EGF-like domains is that they are found in the extracellular domain of membrane-bound proteins or in proteins known to be secreted (exception: prostaglandin G/H synthase). The EGF-like domain includes six cysteine residues which have been shown to be involved in disulfide bonds. The structure of several EGF-like domains has been solved. The fold consists of two-stranded beta-sheet followed by a loop to a C-terminal short two-stranded sheet.

Contributing signatures

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