Fibulin-1 (IPR017048)

Short name: Fibulin-1

Overlapping homologous superfamilies


Family relationships



Fibulins are a family of ECM glycoproteins characterized by a fibulin-type C-terminal domain preceded by tandem calcium-binding epidermal growth factor (EGF)-like modules. They are involved in protein-protein interaction with the components of basement membrane and extracellular matrix proteins. There are five fibulins, which can be classified into two subgroups. Fibulin-1 and -2 constitute one subgroup. These fibulins are larger than the others due to the presence of a higher number of EGF modules and an extra domain with three anaphylatoxin modules [PMID: 17324935]. Members of the second subgroup, fibulin-3, -4, and -5, are similarly small in size and highly homologous to one another in modular structure. They consist of a modified cbEGF domain at the N terminus followed by five tandem cbEGF modules and the fibulin-type C-terminal region.

This entry represents the fibulin-1 proteins, which are incorporated into fibronectin-containing matrix fibres and may play a role in cell adhesion and migration [PMID: 9106159].

GO terms

Biological Process

GO:0030198 extracellular matrix organization

Molecular Function

GO:0016504 peptidase activator activity

Cellular Component

No terms assigned in this category.

Contributing signatures

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